2.5.65-mm4

2.5.65-mm4

[Andrew Morton]

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.65/2.5.65-mm4/

. Anyone who was having problems with knfsd exports should find them fixed
  here.  It was a 32-bit dev_t problem.

. Several ext3 speedups here.  They reduce the overhead of a write() to
  ext3 by about 45%.

. Large locking changes to ext3.  lock_kernel() has been completely
  removed from ext3 and pushed down into the JBD layer, around those bits
  which actually need it.

  Lock contention is greatly reduced, but this change means that the
  front-line locking for ext3 is now two semaphores.  The context switch rate
  under load has gone through the roof.  So there is more work to be done
  here yet.

. Managed to reduce the number of patches from 127 down to 74 by various
  means.  The major outstanding things here at present are the anticipatory
  scheduler, object-based-rmap and ext3 locking work.




Changes since 2.5.65-mm3:

 linus.patch

 Latest from -bk.

-posix-timers-fixes.patch
-tcp-wakeups.patch
-remap-file-pages-2.5.63-a1.patch
-hugh-remap-fix.patch
-fremap-limit-offsets.patch
-filemap_populate-speedup.patch
-file-offset-in-pte-x86_64.patch
-file-offset-in-pte-ppc64.patch
-update_atime-ng.patch
-one-sec-times.patch
-lseek-ext2_readdir.patch
-inode_setattr-lock_kernel-removal.patch
-ide_probe-init_irq-fix.patch
-raid1-fix.patch
-nmi-watchdog-fix.patch
-vm_enough_memory-speedup.patch
-nanosleep-accuracy-fix-2.patch
-dev_t-1-kill-cdev.patch
-dev_t-2-remove-MAX_CHRDEV.patch
-dev_t-3-major_h-cleanup.patch
-cpufreq-xtime-locking.patch
-cs46xx-fixes.patch
-tty-put_user-checks.patch
-fail-setup_irq-for-unconfigured-IRQs.patch
-raw-fix-address_space-rewriting.patch
-raw-cleanups-and-fixlets.patch
-timer-simplification.patch
-timer-lockup-fix-simplification.patch
-slab-large-obj-tuning.patch
-floppy-oops-fix.patch
-ext3_writepage-use-after-free-fix.patch
-list-barriers-on-smp-only.patch
-sync_filesystems-docco-lock.patch
-awe_wave-linkage-error-fix.patch
-syscalls-return-long.patch
-syscalls-return-long-2.patch

 Merged

-kgdb-cleanup.patch

 Folded into kgdb.patch

-proc-sys-debug.patch

 Lost interest in this.
 
-as-debug-BUG-fix.patch
-as-eject-BUG-fix.patch
-as-jumbo-fix.patch
-as-request_fn-in-timer.patch
-as-remove-request-fix.patch
-as-np-1.patch
-as-use-kblockd.patch
-as-cleanup-2.patch
-as-as_remove_request-simplification.patch
-as-dont-go-BUG-again.patch
-as-handle-non-block-requests.patch

 Folded into as-iosched.patch

-cfq-fix.patch

 Folded into cfq-2.patch

-objrmap-nonlinear-fixes.patch

 Folded into objrmap-2.5.62-5.patch

-anobjrmap-1-rmap_h.patch
-anobjrmap-2-mapping.patch
-anobjrmap-3-unchained.patch
-anobjrmap-4-anonmm.patch
-anobjrmap-5-rechained.patch
-anobjrmap-6-arches.patch
-anobjrmap-ttfb-no-BUG.patch

 Dropped.  Is currently a bit marginal and overlaps other patches.

-brlock-1b.patch
-brlock-removal-2.patch
-brlock-removal-3.patch
-brlock-removal-4.patch
-brlock-removal-5.patch

 Dropped.  A bit too invasive on the networking layer for this stage in the
 development cycle.

-dev_t-remove-B_FREE.patch

 The files it patches got moved around.  I need to fix this up.

-smalldevfs.patch

 This kept on getting broken by devfs changes and is outdated anyway.

-notsclock-option.patch

 Obsoleted by x86-clock-override-option.patch

+sg-dev_t-fix.patch
+nfsd-32-bit-dev_t-fixes.patch

 Fixes for 32-bit dev_t.

+x86-clock-override-option.patch

 Boot-time setting of the gettimeofday() source for ia32.

+VM_DONTEXPAND-fix.patch

 Fix VM_DONTEXPAND for drivers/media/video/video-buf.c

+i2c-fix.patch

 Fix an i2c oops

+ext3_mark_inode_dirty-speedup.patch
+ext3_mark_inode_dirty-less-calls.patch
+ext3-handle-cache.patch

 ext3 speedups

+ext3-no-bkl.patch

 Push lock_kernel() down from ext3 into JBD.

+journal_dirty_metadata-speedup.patch
+journal_get_write_access-speedup.patch

 JBD speedups

+cdevname-irq-safety-fix.patch
+register_chrdev_region-leak-fix.patch

 fs/char_dev.c fixes.




All 74 patches:

linus.patch
  Latest from Linus

mm.patch
  add -mmN to EXTRAVERSION

kgdb.patch

config_spinline.patch
  uninline spinlocks for profiling accuracy.

ppc64-reloc_hide.patch

ppc64-pci-patch.patch
  Subject: pci patch

ppc64-aio-32bit-emulation.patch
  32/64bit emulation for aio

ppc64-scruffiness.patch
  Fix some PPC64 compile warnings

sym-do-160.patch
  make the SYM driver do 160 MB/sec

config-PAGE_OFFSET.patch
  Configurable kenrel/user memory split

ptrace-flush.patch
  cache flushing in the ptrace code

buffer-debug.patch
  buffer.c debugging

warn-null-wakeup.patch

ext3-truncate-ordered-pages.patch
  ext3: explicitly free truncated pages

reiserfs_file_write-5.patch

rcu-stats.patch
  RCU statistics reporting

ext3-journalled-data-assertion-fix.patch
  Remove incorrect assertion from ext3

nfs-speedup.patch

nfs-oom-fix.patch
  nfs oom fix

sk-allocation.patch
  Subject: Re: nfs oom

nfs-more-oom-fix.patch

rpciod-atomic-allocations.patch
  Make rcpiod use atomic allocations

linux-isp.patch

isp-update-1.patch

kblockd.patch
  Create `kblockd' workqueue

as-iosched.patch
  anticipatory I/O scheduler

as-np-reads-1.patch
  AS: read-vs-read fixes

as-np-reads-2.patch
  AS: more read-vs-read fixes

as-predict-data-direction.patch
  as: predict direction of next IO

as-remove-frontmerge.patch
  AS: remove frontmerge tunable

as-misc-cleanups.patch
  AS: misc cleanups

cfq-2.patch
  CFQ scheduler, #2

unplug-use-kblockd.patch
  Use kblockd for running request queues

fremap-all-mappings.patch
  Make all executable mappings be nonlinear

objrmap-2.5.62-5.patch
  object-based rmap

sched-2.5.64-D3.patch
  sched-2.5.64-D3, more interactivity changes

scheduler-tunables.patch
  scheduler tunables

show_task-free-stack-fix.patch
  show_task() fix and cleanup

yellowfin-set_bit-fix.patch
  yellowfin driver set_bit fix

htree-nfs-fix.patch
  Fix ext3 htree / NFS compatibility problems

task_prio-fix.patch
  simple task_prio() fix

slab_store_user-large-objects.patch
  slab debug: perform redzoning against larger objects

pcmcia-2.patch

pcmcia-3b.patch

pcmcia-3.patch

pcmcia-4.patch

pcmcia-5.patch

pcmcia-6.patch

pcmcia-7b.patch

pcmcia-7.patch

pcmcia-8.patch

pcmcia-9.patch

pcmcia-10.patch

htree-nfs-fix-2.patch
  htree nfs fix

ext2-no-lock_super.patch
  concurrent block allocation for ext2

ext2-ialloc-no-lock_super.patch
  concurrent inode allocation for ext2

linear-oops-fix-1.patch
  md/linear oops fix

dev_t-32-bit.patch
  [for playing only] change type of dev_t

dev_t-drm-warnings.patch
  dev_t: fix drm printk warnings

sg-dev_t-fix.patch
  32-bit dev_t fix for sg

nfsd-32-bit-dev_t-fixes.patch
  nfsd fixes for 32-bit dev_t

oops-dump-preceding-code.patch
  i386 oops output: dump preceding code

x86-clock-override-option.patch
  x86 clock override boot option

conntrack-use-after-free-fix.patch
  fix use-after-free in ip_conntrack

VM_DONTEXPAND-fix.patch
  honour VM_DONTEXPAND in vma merging

i2c-fix.patch
  Subject: [PATCH] Fix kobject_get oopses triggered by i2c in 2.5.65-bk

ext3_mark_inode_dirty-speedup.patch
  ext3_mark_inode_dirty() speedup

ext3_mark_inode_dirty-less-calls.patch
  ext3_commit_write speedup

ext3-handle-cache.patch
  ext3: create a slab cache for transaction handles

ext3-no-bkl.patch

journal_dirty_metadata-speedup.patch

journal_get_write_access-speedup.patch

cdevname-irq-safety-fix.patch
  make cdevname() callable from interrupts

register_chrdev_region-leak-fix.patch
  register_chrdev_region() leak and race fix



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Re: 2.5.65-mm4

[Alexander Hoogerhuis]

Andrew Morton <akpm@digeo.com> writes:

> 
> [SNIP]
> 

Ouch:

  gcc -Wp,-MD,drivers/char/.genrtc.o.d -D__KERNEL__ -Iinclude -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 -march=pentium4 -Iinclude/asm-i386/mach-default -nostdinc -iwithprefix include -DMODULE   -DKBUILD_BASENAME=genrtc -DKBUILD_MODNAME=genrtc -c -o drivers/char/.tmp_genrtc.o drivers/char/genrtc.c
drivers/char/genrtc.c:100: warning: static declaration for `gen_rtc_interrupt' follows non-static
drivers/char/genrtc.c: In function `gen_rtc_timer':
drivers/char/genrtc.c:135: warning: comparison of distinct pointer types lacks a cast
drivers/char/genrtc.c: In function `gen_rtc_open':
drivers/char/genrtc.c:358: warning: `MOD_INC_USE_COUNT' is deprecated (declared at include/linux/module.h:431)
drivers/char/genrtc.c: In function `gen_rtc_release':
drivers/char/genrtc.c:377: warning: `MOD_DEC_USE_COUNT' is deprecated (declared at include/linux/module.h:443)
drivers/char/genrtc.c: In function `gen_rtc_proc_output':
drivers/char/genrtc.c:453: void value not ignored as it ought to be
drivers/char/genrtc.c:498: `RTC_BATT_BAD' undeclared (first use in this function)
drivers/char/genrtc.c:498: (Each undeclared identifier is reported only once
drivers/char/genrtc.c:498: for each function it appears in.)
make[2]: *** [drivers/char/genrtc.o] Error 1
make[1]: *** [drivers/char] Error 2
make: *** [drivers] Error 2

mvh,
A
-- 
Alexander Hoogerhuis                               | alexh@ihatent.com
CCNP - CCDP - MCNE - CCSE                          | +47 908 21 485
"You have zero privacy anyway. Get over it."  --Scott McNealy
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Re: 2.5.65-mm4

[Martin J. Bligh]

Seems to hang SDET ... I use ext2 for root & benchmarking, but ext3
for my home dir, so there's a *tiny* bit of ext3 going on I guess.

the sdet script seems to be hung ...

larry:~# strace -p 5342
wait4(31314, 

larry:~# ps -ef | grep 31314
root     31314  5342  0 08:45 pts/0    00:00:00 sync

strace -p 31314 yields nothing.

That's probably not very helpful, is it ...
Let me know what else I can grab ...

M.


--On Sunday, March 23, 2003 02:06:46 -0800 Andrew Morton <akpm@digeo.com> wrote:

> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.65/2.5.65-mm4/
> 
> . Anyone who was having problems with knfsd exports should find them fixed
>   here.  It was a 32-bit dev_t problem.
> 
> . Several ext3 speedups here.  They reduce the overhead of a write() to
>   ext3 by about 45%.
> 
> . Large locking changes to ext3.  lock_kernel() has been completely
>   removed from ext3 and pushed down into the JBD layer, around those bits
>   which actually need it.
> 
>   Lock contention is greatly reduced, but this change means that the
>   front-line locking for ext3 is now two semaphores.  The context switch rate
>   under load has gone through the roof.  So there is more work to be done
>   here yet.
> 
> . Managed to reduce the number of patches from 127 down to 74 by various
>   means.  The major outstanding things here at present are the anticipatory
>   scheduler, object-based-rmap and ext3 locking work.
> 
> 
> 
> 
> Changes since 2.5.65-mm3:
> 
>  linus.patch
> 
>  Latest from -bk.
> 
> -posix-timers-fixes.patch
> -tcp-wakeups.patch
> -remap-file-pages-2.5.63-a1.patch
> -hugh-remap-fix.patch
> -fremap-limit-offsets.patch
> -filemap_populate-speedup.patch
> -file-offset-in-pte-x86_64.patch
> -file-offset-in-pte-ppc64.patch
> -update_atime-ng.patch
> -one-sec-times.patch
> -lseek-ext2_readdir.patch
> -inode_setattr-lock_kernel-removal.patch
> -ide_probe-init_irq-fix.patch
> -raid1-fix.patch
> -nmi-watchdog-fix.patch
> -vm_enough_memory-speedup.patch
> -nanosleep-accuracy-fix-2.patch
> -dev_t-1-kill-cdev.patch
> -dev_t-2-remove-MAX_CHRDEV.patch
> -dev_t-3-major_h-cleanup.patch
> -cpufreq-xtime-locking.patch
> -cs46xx-fixes.patch
> -tty-put_user-checks.patch
> -fail-setup_irq-for-unconfigured-IRQs.patch
> -raw-fix-address_space-rewriting.patch
> -raw-cleanups-and-fixlets.patch
> -timer-simplification.patch
> -timer-lockup-fix-simplification.patch
> -slab-large-obj-tuning.patch
> -floppy-oops-fix.patch
> -ext3_writepage-use-after-free-fix.patch
> -list-barriers-on-smp-only.patch
> -sync_filesystems-docco-lock.patch
> -awe_wave-linkage-error-fix.patch
> -syscalls-return-long.patch
> -syscalls-return-long-2.patch
> 
>  Merged
> 
> -kgdb-cleanup.patch
> 
>  Folded into kgdb.patch
> 
> -proc-sys-debug.patch
> 
>  Lost interest in this.
>  
> -as-debug-BUG-fix.patch
> -as-eject-BUG-fix.patch
> -as-jumbo-fix.patch
> -as-request_fn-in-timer.patch
> -as-remove-request-fix.patch
> -as-np-1.patch
> -as-use-kblockd.patch
> -as-cleanup-2.patch
> -as-as_remove_request-simplification.patch
> -as-dont-go-BUG-again.patch
> -as-handle-non-block-requests.patch
> 
>  Folded into as-iosched.patch
> 
> -cfq-fix.patch
> 
>  Folded into cfq-2.patch
> 
> -objrmap-nonlinear-fixes.patch
> 
>  Folded into objrmap-2.5.62-5.patch
> 
> -anobjrmap-1-rmap_h.patch
> -anobjrmap-2-mapping.patch
> -anobjrmap-3-unchained.patch
> -anobjrmap-4-anonmm.patch
> -anobjrmap-5-rechained.patch
> -anobjrmap-6-arches.patch
> -anobjrmap-ttfb-no-BUG.patch
> 
>  Dropped.  Is currently a bit marginal and overlaps other patches.
> 
> -brlock-1b.patch
> -brlock-removal-2.patch
> -brlock-removal-3.patch
> -brlock-removal-4.patch
> -brlock-removal-5.patch
> 
>  Dropped.  A bit too invasive on the networking layer for this stage in the
>  development cycle.
> 
> -dev_t-remove-B_FREE.patch
> 
>  The files it patches got moved around.  I need to fix this up.
> 
> -smalldevfs.patch
> 
>  This kept on getting broken by devfs changes and is outdated anyway.
> 
> -notsclock-option.patch
> 
>  Obsoleted by x86-clock-override-option.patch
> 
> +sg-dev_t-fix.patch
> +nfsd-32-bit-dev_t-fixes.patch
> 
>  Fixes for 32-bit dev_t.
> 
> +x86-clock-override-option.patch
> 
>  Boot-time setting of the gettimeofday() source for ia32.
> 
> +VM_DONTEXPAND-fix.patch
> 
>  Fix VM_DONTEXPAND for drivers/media/video/video-buf.c
> 
> +i2c-fix.patch
> 
>  Fix an i2c oops
> 
> +ext3_mark_inode_dirty-speedup.patch
> +ext3_mark_inode_dirty-less-calls.patch
> +ext3-handle-cache.patch
> 
>  ext3 speedups
> 
> +ext3-no-bkl.patch
> 
>  Push lock_kernel() down from ext3 into JBD.
> 
> +journal_dirty_metadata-speedup.patch
> +journal_get_write_access-speedup.patch
> 
>  JBD speedups
> 
> +cdevname-irq-safety-fix.patch
> +register_chrdev_region-leak-fix.patch
> 
>  fs/char_dev.c fixes.
> 
> 
> 
> 
> All 74 patches:
> 
> linus.patch
>   Latest from Linus
> 
> mm.patch
>   add -mmN to EXTRAVERSION
> 
> kgdb.patch
> 
> config_spinline.patch
>   uninline spinlocks for profiling accuracy.
> 
> ppc64-reloc_hide.patch
> 
> ppc64-pci-patch.patch
>   Subject: pci patch
> 
> ppc64-aio-32bit-emulation.patch
>   32/64bit emulation for aio
> 
> ppc64-scruffiness.patch
>   Fix some PPC64 compile warnings
> 
> sym-do-160.patch
>   make the SYM driver do 160 MB/sec
> 
> config-PAGE_OFFSET.patch
>   Configurable kenrel/user memory split
> 
> ptrace-flush.patch
>   cache flushing in the ptrace code
> 
> buffer-debug.patch
>   buffer.c debugging
> 
> warn-null-wakeup.patch
> 
> ext3-truncate-ordered-pages.patch
>   ext3: explicitly free truncated pages
> 
> reiserfs_file_write-5.patch
> 
> rcu-stats.patch
>   RCU statistics reporting
> 
> ext3-journalled-data-assertion-fix.patch
>   Remove incorrect assertion from ext3
> 
> nfs-speedup.patch
> 
> nfs-oom-fix.patch
>   nfs oom fix
> 
> sk-allocation.patch
>   Subject: Re: nfs oom
> 
> nfs-more-oom-fix.patch
> 
> rpciod-atomic-allocations.patch
>   Make rcpiod use atomic allocations
> 
> linux-isp.patch
> 
> isp-update-1.patch
> 
> kblockd.patch
>   Create `kblockd' workqueue
> 
> as-iosched.patch
>   anticipatory I/O scheduler
> 
> as-np-reads-1.patch
>   AS: read-vs-read fixes
> 
> as-np-reads-2.patch
>   AS: more read-vs-read fixes
> 
> as-predict-data-direction.patch
>   as: predict direction of next IO
> 
> as-remove-frontmerge.patch
>   AS: remove frontmerge tunable
> 
> as-misc-cleanups.patch
>   AS: misc cleanups
> 
> cfq-2.patch
>   CFQ scheduler, #2
> 
> unplug-use-kblockd.patch
>   Use kblockd for running request queues
> 
> fremap-all-mappings.patch
>   Make all executable mappings be nonlinear
> 
> objrmap-2.5.62-5.patch
>   object-based rmap
> 
> sched-2.5.64-D3.patch
>   sched-2.5.64-D3, more interactivity changes
> 
> scheduler-tunables.patch
>   scheduler tunables
> 
> show_task-free-stack-fix.patch
>   show_task() fix and cleanup
> 
> yellowfin-set_bit-fix.patch
>   yellowfin driver set_bit fix
> 
> htree-nfs-fix.patch
>   Fix ext3 htree / NFS compatibility problems
> 
> task_prio-fix.patch
>   simple task_prio() fix
> 
> slab_store_user-large-objects.patch
>   slab debug: perform redzoning against larger objects
> 
> pcmcia-2.patch
> 
> pcmcia-3b.patch
> 
> pcmcia-3.patch
> 
> pcmcia-4.patch
> 
> pcmcia-5.patch
> 
> pcmcia-6.patch
> 
> pcmcia-7b.patch
> 
> pcmcia-7.patch
> 
> pcmcia-8.patch
> 
> pcmcia-9.patch
> 
> pcmcia-10.patch
> 
> htree-nfs-fix-2.patch
>   htree nfs fix
> 
> ext2-no-lock_super.patch
>   concurrent block allocation for ext2
> 
> ext2-ialloc-no-lock_super.patch
>   concurrent inode allocation for ext2
> 
> linear-oops-fix-1.patch
>   md/linear oops fix
> 
> dev_t-32-bit.patch
>   [for playing only] change type of dev_t
> 
> dev_t-drm-warnings.patch
>   dev_t: fix drm printk warnings
> 
> sg-dev_t-fix.patch
>   32-bit dev_t fix for sg
> 
> nfsd-32-bit-dev_t-fixes.patch
>   nfsd fixes for 32-bit dev_t
> 
> oops-dump-preceding-code.patch
>   i386 oops output: dump preceding code
> 
> x86-clock-override-option.patch
>   x86 clock override boot option
> 
> conntrack-use-after-free-fix.patch
>   fix use-after-free in ip_conntrack
> 
> VM_DONTEXPAND-fix.patch
>   honour VM_DONTEXPAND in vma merging
> 
> i2c-fix.patch
>   Subject: [PATCH] Fix kobject_get oopses triggered by i2c in 2.5.65-bk
> 
> ext3_mark_inode_dirty-speedup.patch
>   ext3_mark_inode_dirty() speedup
> 
> ext3_mark_inode_dirty-less-calls.patch
>   ext3_commit_write speedup
> 
> ext3-handle-cache.patch
>   ext3: create a slab cache for transaction handles
> 
> ext3-no-bkl.patch
> 
> journal_dirty_metadata-speedup.patch
> 
> journal_get_write_access-speedup.patch
> 
> cdevname-irq-safety-fix.patch
>   make cdevname() callable from interrupts
> 
> register_chrdev_region-leak-fix.patch
>   register_chrdev_region() leak and race fix
> 
> 
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"aart@kvack.org">aart@kvack.org</a>
> 
> 


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Re: 2.5.65-mm4

[Martin J. Bligh]

Hmmmm .... well scp'ing something to the fs 15 minutes later kicked it 
back into life ... and I just kicked it with 5 full SDET runs, with no
problems.

Mmmm. sunspots. or a SCSI error. or something.

M.


--On Sunday, March 23, 2003 10:16:37 -0800 "Martin J. Bligh" <mbligh@aracnet.com> wrote:

> Seems to hang SDET ... I use ext2 for root & benchmarking, but ext3
> for my home dir, so there's a *tiny* bit of ext3 going on I guess.
> 
> the sdet script seems to be hung ...
> 
> larry:~# strace -p 5342
> wait4(31314, 
> 
> larry:~# ps -ef | grep 31314
> root     31314  5342  0 08:45 pts/0    00:00:00 sync
> 
> strace -p 31314 yields nothing.
> 
> That's probably not very helpful, is it ...
> Let me know what else I can grab ...
> 
> M.
> 
> 
> --On Sunday, March 23, 2003 02:06:46 -0800 Andrew Morton <akpm@digeo.com> wrote:
> 
>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.65/2.5.65-mm4/
>> 
>> . Anyone who was having problems with knfsd exports should find them fixed
>>   here.  It was a 32-bit dev_t problem.
>> 
>> . Several ext3 speedups here.  They reduce the overhead of a write() to
>>   ext3 by about 45%.
>> 
>> . Large locking changes to ext3.  lock_kernel() has been completely
>>   removed from ext3 and pushed down into the JBD layer, around those bits
>>   which actually need it.
>> 
>>   Lock contention is greatly reduced, but this change means that the
>>   front-line locking for ext3 is now two semaphores.  The context switch rate
>>   under load has gone through the roof.  So there is more work to be done
>>   here yet.
>> 
>> . Managed to reduce the number of patches from 127 down to 74 by various
>>   means.  The major outstanding things here at present are the anticipatory
>>   scheduler, object-based-rmap and ext3 locking work.
>> 
>> 
>> 
>> 
>> Changes since 2.5.65-mm3:
>> 
>>  linus.patch
>> 
>>  Latest from -bk.
>> 
>> -posix-timers-fixes.patch
>> -tcp-wakeups.patch
>> -remap-file-pages-2.5.63-a1.patch
>> -hugh-remap-fix.patch
>> -fremap-limit-offsets.patch
>> -filemap_populate-speedup.patch
>> -file-offset-in-pte-x86_64.patch
>> -file-offset-in-pte-ppc64.patch
>> -update_atime-ng.patch
>> -one-sec-times.patch
>> -lseek-ext2_readdir.patch
>> -inode_setattr-lock_kernel-removal.patch
>> -ide_probe-init_irq-fix.patch
>> -raid1-fix.patch
>> -nmi-watchdog-fix.patch
>> -vm_enough_memory-speedup.patch
>> -nanosleep-accuracy-fix-2.patch
>> -dev_t-1-kill-cdev.patch
>> -dev_t-2-remove-MAX_CHRDEV.patch
>> -dev_t-3-major_h-cleanup.patch
>> -cpufreq-xtime-locking.patch
>> -cs46xx-fixes.patch
>> -tty-put_user-checks.patch
>> -fail-setup_irq-for-unconfigured-IRQs.patch
>> -raw-fix-address_space-rewriting.patch
>> -raw-cleanups-and-fixlets.patch
>> -timer-simplification.patch
>> -timer-lockup-fix-simplification.patch
>> -slab-large-obj-tuning.patch
>> -floppy-oops-fix.patch
>> -ext3_writepage-use-after-free-fix.patch
>> -list-barriers-on-smp-only.patch
>> -sync_filesystems-docco-lock.patch
>> -awe_wave-linkage-error-fix.patch
>> -syscalls-return-long.patch
>> -syscalls-return-long-2.patch
>> 
>>  Merged
>> 
>> -kgdb-cleanup.patch
>> 
>>  Folded into kgdb.patch
>> 
>> -proc-sys-debug.patch
>> 
>>  Lost interest in this.
>>  
>> -as-debug-BUG-fix.patch
>> -as-eject-BUG-fix.patch
>> -as-jumbo-fix.patch
>> -as-request_fn-in-timer.patch
>> -as-remove-request-fix.patch
>> -as-np-1.patch
>> -as-use-kblockd.patch
>> -as-cleanup-2.patch
>> -as-as_remove_request-simplification.patch
>> -as-dont-go-BUG-again.patch
>> -as-handle-non-block-requests.patch
>> 
>>  Folded into as-iosched.patch
>> 
>> -cfq-fix.patch
>> 
>>  Folded into cfq-2.patch
>> 
>> -objrmap-nonlinear-fixes.patch
>> 
>>  Folded into objrmap-2.5.62-5.patch
>> 
>> -anobjrmap-1-rmap_h.patch
>> -anobjrmap-2-mapping.patch
>> -anobjrmap-3-unchained.patch
>> -anobjrmap-4-anonmm.patch
>> -anobjrmap-5-rechained.patch
>> -anobjrmap-6-arches.patch
>> -anobjrmap-ttfb-no-BUG.patch
>> 
>>  Dropped.  Is currently a bit marginal and overlaps other patches.
>> 
>> -brlock-1b.patch
>> -brlock-removal-2.patch
>> -brlock-removal-3.patch
>> -brlock-removal-4.patch
>> -brlock-removal-5.patch
>> 
>>  Dropped.  A bit too invasive on the networking layer for this stage in the
>>  development cycle.
>> 
>> -dev_t-remove-B_FREE.patch
>> 
>>  The files it patches got moved around.  I need to fix this up.
>> 
>> -smalldevfs.patch
>> 
>>  This kept on getting broken by devfs changes and is outdated anyway.
>> 
>> -notsclock-option.patch
>> 
>>  Obsoleted by x86-clock-override-option.patch
>> 
>> +sg-dev_t-fix.patch
>> +nfsd-32-bit-dev_t-fixes.patch
>> 
>>  Fixes for 32-bit dev_t.
>> 
>> +x86-clock-override-option.patch
>> 
>>  Boot-time setting of the gettimeofday() source for ia32.
>> 
>> +VM_DONTEXPAND-fix.patch
>> 
>>  Fix VM_DONTEXPAND for drivers/media/video/video-buf.c
>> 
>> +i2c-fix.patch
>> 
>>  Fix an i2c oops
>> 
>> +ext3_mark_inode_dirty-speedup.patch
>> +ext3_mark_inode_dirty-less-calls.patch
>> +ext3-handle-cache.patch
>> 
>>  ext3 speedups
>> 
>> +ext3-no-bkl.patch
>> 
>>  Push lock_kernel() down from ext3 into JBD.
>> 
>> +journal_dirty_metadata-speedup.patch
>> +journal_get_write_access-speedup.patch
>> 
>>  JBD speedups
>> 
>> +cdevname-irq-safety-fix.patch
>> +register_chrdev_region-leak-fix.patch
>> 
>>  fs/char_dev.c fixes.
>> 
>> 
>> 
>> 
>> All 74 patches:
>> 
>> linus.patch
>>   Latest from Linus
>> 
>> mm.patch
>>   add -mmN to EXTRAVERSION
>> 
>> kgdb.patch
>> 
>> config_spinline.patch
>>   uninline spinlocks for profiling accuracy.
>> 
>> ppc64-reloc_hide.patch
>> 
>> ppc64-pci-patch.patch
>>   Subject: pci patch
>> 
>> ppc64-aio-32bit-emulation.patch
>>   32/64bit emulation for aio
>> 
>> ppc64-scruffiness.patch
>>   Fix some PPC64 compile warnings
>> 
>> sym-do-160.patch
>>   make the SYM driver do 160 MB/sec
>> 
>> config-PAGE_OFFSET.patch
>>   Configurable kenrel/user memory split
>> 
>> ptrace-flush.patch
>>   cache flushing in the ptrace code
>> 
>> buffer-debug.patch
>>   buffer.c debugging
>> 
>> warn-null-wakeup.patch
>> 
>> ext3-truncate-ordered-pages.patch
>>   ext3: explicitly free truncated pages
>> 
>> reiserfs_file_write-5.patch
>> 
>> rcu-stats.patch
>>   RCU statistics reporting
>> 
>> ext3-journalled-data-assertion-fix.patch
>>   Remove incorrect assertion from ext3
>> 
>> nfs-speedup.patch
>> 
>> nfs-oom-fix.patch
>>   nfs oom fix
>> 
>> sk-allocation.patch
>>   Subject: Re: nfs oom
>> 
>> nfs-more-oom-fix.patch
>> 
>> rpciod-atomic-allocations.patch
>>   Make rcpiod use atomic allocations
>> 
>> linux-isp.patch
>> 
>> isp-update-1.patch
>> 
>> kblockd.patch
>>   Create `kblockd' workqueue
>> 
>> as-iosched.patch
>>   anticipatory I/O scheduler
>> 
>> as-np-reads-1.patch
>>   AS: read-vs-read fixes
>> 
>> as-np-reads-2.patch
>>   AS: more read-vs-read fixes
>> 
>> as-predict-data-direction.patch
>>   as: predict direction of next IO
>> 
>> as-remove-frontmerge.patch
>>   AS: remove frontmerge tunable
>> 
>> as-misc-cleanups.patch
>>   AS: misc cleanups
>> 
>> cfq-2.patch
>>   CFQ scheduler, #2
>> 
>> unplug-use-kblockd.patch
>>   Use kblockd for running request queues
>> 
>> fremap-all-mappings.patch
>>   Make all executable mappings be nonlinear
>> 
>> objrmap-2.5.62-5.patch
>>   object-based rmap
>> 
>> sched-2.5.64-D3.patch
>>   sched-2.5.64-D3, more interactivity changes
>> 
>> scheduler-tunables.patch
>>   scheduler tunables
>> 
>> show_task-free-stack-fix.patch
>>   show_task() fix and cleanup
>> 
>> yellowfin-set_bit-fix.patch
>>   yellowfin driver set_bit fix
>> 
>> htree-nfs-fix.patch
>>   Fix ext3 htree / NFS compatibility problems
>> 
>> task_prio-fix.patch
>>   simple task_prio() fix
>> 
>> slab_store_user-large-objects.patch
>>   slab debug: perform redzoning against larger objects
>> 
>> pcmcia-2.patch
>> 
>> pcmcia-3b.patch
>> 
>> pcmcia-3.patch
>> 
>> pcmcia-4.patch
>> 
>> pcmcia-5.patch
>> 
>> pcmcia-6.patch
>> 
>> pcmcia-7b.patch
>> 
>> pcmcia-7.patch
>> 
>> pcmcia-8.patch
>> 
>> pcmcia-9.patch
>> 
>> pcmcia-10.patch
>> 
>> htree-nfs-fix-2.patch
>>   htree nfs fix
>> 
>> ext2-no-lock_super.patch
>>   concurrent block allocation for ext2
>> 
>> ext2-ialloc-no-lock_super.patch
>>   concurrent inode allocation for ext2
>> 
>> linear-oops-fix-1.patch
>>   md/linear oops fix
>> 
>> dev_t-32-bit.patch
>>   [for playing only] change type of dev_t
>> 
>> dev_t-drm-warnings.patch
>>   dev_t: fix drm printk warnings
>> 
>> sg-dev_t-fix.patch
>>   32-bit dev_t fix for sg
>> 
>> nfsd-32-bit-dev_t-fixes.patch
>>   nfsd fixes for 32-bit dev_t
>> 
>> oops-dump-preceding-code.patch
>>   i386 oops output: dump preceding code
>> 
>> x86-clock-override-option.patch
>>   x86 clock override boot option
>> 
>> conntrack-use-after-free-fix.patch
>>   fix use-after-free in ip_conntrack
>> 
>> VM_DONTEXPAND-fix.patch
>>   honour VM_DONTEXPAND in vma merging
>> 
>> i2c-fix.patch
>>   Subject: [PATCH] Fix kobject_get oopses triggered by i2c in 2.5.65-bk
>> 
>> ext3_mark_inode_dirty-speedup.patch
>>   ext3_mark_inode_dirty() speedup
>> 
>> ext3_mark_inode_dirty-less-calls.patch
>>   ext3_commit_write speedup
>> 
>> ext3-handle-cache.patch
>>   ext3: create a slab cache for transaction handles
>> 
>> ext3-no-bkl.patch
>> 
>> journal_dirty_metadata-speedup.patch
>> 
>> journal_get_write_access-speedup.patch
>> 
>> cdevname-irq-safety-fix.patch
>>   make cdevname() callable from interrupts
>> 
>> register_chrdev_region-leak-fix.patch
>>   register_chrdev_region() leak and race fix
>> 
>> 
>> 
>> --
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>> 
> 
> 
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Re: 2.5.65-mm4

[Martin J. Bligh]

> . Several ext3 speedups here.  They reduce the overhead of a write() to
>   ext3 by about 45%.
> 
> . Large locking changes to ext3.  lock_kernel() has been completely
>   removed from ext3 and pushed down into the JBD layer, around those bits
>   which actually need it.
> 
>   Lock contention is greatly reduced, but this change means that the
>   front-line locking for ext3 is now two semaphores.  The context switch
> rate   under load has gone through the roof.  So there is more work to be
> done   here yet.

Well, it shook things up a bit, but doesn't seem to have much effect for
the workload I was looking at, at least:

DISCLAIMER: SPEC(tm) and the benchmark name SDET(tm) are registered
trademarks of the Standard Performance Evaluation Corporation. This 
benchmarking was performed for research purposes only, and the run results
are non-compliant and not-comparable with any published results.

Results are shown as percentages of the first set displayed

SDET 1  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         2.0%
               2.5.65-mm4        98.9%         1.8%
          2.5.65-mm4-ext3        90.4%         4.1%

SDET 2  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         2.3%
               2.5.65-mm4        98.3%         3.6%
          2.5.65-mm4-ext3        93.4%         3.1%

SDET 4  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         1.3%
               2.5.65-mm4        97.8%         0.3%
          2.5.65-mm4-ext3        45.5%         7.1%

SDET 8  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         1.0%
               2.5.65-mm4        98.7%         1.5%
          2.5.65-mm4-ext3        13.7%         3.3%

SDET 16  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         1.0%
               2.5.65-mm4        55.2%        57.2%
          2.5.65-mm4-ext3         8.4%         2.5%

SDET 32  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         0.5%
               2.5.65-mm4        98.2%         0.6%
          2.5.65-mm4-ext3         8.5%         3.7%

SDET 64  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         0.4%
               2.5.65-mm4        97.7%         0.4%
          2.5.65-mm4-ext3         7.9%         2.2%

SDET 128  (see disclaimer)
                           Throughput    Std. Dev
               2.5.65-mm3       100.0%         0.6%
               2.5.65-mm4        98.0%         0.4%
          2.5.65-mm4-ext3         8.3%         1.2%

profile from SDET 64:

82303 __down
42835 schedule
31323 __wake_up
26435 .text.lock.sched
15924 .text.lock.transaction
6470 do_get_write_access
5106 zap_pte_range
4693 copy_page_range
4522 journal_add_journal_head
4491 __blk_queue_bounce
4179 page_remove_rmap
3859 find_get_page
3687 journal_get_write_access
2949 journal_dirty_metadata
2769 cpu_idle
2691 d_lookup
2495 start_this_handle
2220 __copy_to_user_ll
2199 do_anonymous_page
2168 __find_get_block
2069 page_add_rmap
2063 __find_get_block_slow
1842 .text.lock.attr
1650 do_wp_page
1603 ext3_get_inode_loc
1600 release_pages
1405 journal_stop
1237 find_next_usable_block
1233 do_no_page
1224 current_kernel_time
1203 __brelse
1143 ext3_do_update_inode
1083 kmem_cache_free
1030 kmap_atomic

diffprofile with a spinlined version 
(still on ext3, should just show who took the locks).

     20618    48.1% schedule
      6211    96.0% do_get_write_access
      4485   609.4% journal_start
      3559   253.3% journal_stop
      1554   582.0% inode_change_ok
       605  1680.6% sem_exit
       589    13.0% journal_add_journal_head
       421   825.5% proc_pid_readlink
       301    13.9% __find_get_block
       246  1366.7% sys_ioctl
       186    15.0% find_next_usable_block
       139   195.8% inode_setattr
       122    13.2% atomic_dec_and_lock
...
      -101    -9.3% kmem_cache_free
      -103   -34.0% journal_forget
      -106   -20.7% __make_request
      -117  -100.0% .text.lock.root
      -118    -5.7% page_add_rmap
      -123   -15.2% free_hot_cold_page
      -126    -7.6% do_wp_page
      -127    -3.0% page_remove_rmap
      -130   -17.2% buffered_rmqueue
      -133    -5.3% start_this_handle
      -149   -24.8% scsi_queue_next_request
      -181  -100.0% .text.lock.dec_and_lock
      -209   -10.1% __find_get_block_slow
      -210    -5.7% journal_get_write_access
      -269   -12.1% __copy_to_user_ll
      -318  -100.0% .text.lock.ioctl
      -383    -8.5% __blk_queue_bounce
      -438  -100.0% .text.lock.base
      -736  -100.0% .text.lock.sem
      -903  -100.0% .text.lock.journal
     -1008    -3.2% __wake_up
     -1842  -100.0% .text.lock.attr
     -3472    -4.2% __down
    -14325    -0.6% default_idle
    -15908   -99.9% .text.lock.transaction
    -26435  -100.0% .text.lock.sched
    -30643    -1.2% total

I'll need to put something else together for the semaphores, unless
you already know who's taking them ...

Just for reference, this is the profile from the -mjb1 run with ext3 I did:

22660 .text.lock.inode
2888 .text.lock.namei
2570 .text.lock.sched
2424 .text.lock.attr
860 ext3_prepare_write
498 unmap_all_pages
468 .text.lock.dir
464 ext3_commit_write
448 page_remove_rmap
427 copy_page_range
411 .text.lock.sem
356 schedule
349 __down
302 page_add_rmap
252 find_get_page
252 .text.lock.base
246 d_lookup
225 .text.lock.ioctl
209 __copy_to_user_ll
199 inode_change_ok
196 journal_add_journal_head
187 __wake_up
176 start_this_handle
176 __blk_queue_bounce
175 ext3_setattr
170 do_anonymous_page
156 do_wp_page
145 ext3_dirty_inode
127 __find_get_block
122 ext3_get_block_handle
118 find_next_usable_block
118 do_get_write_access
117 do_no_page
111 ext3_get_inode_loc
107 kmap_atomic
106 do_page_fault
104 __block_prepare_write
101 pte_alloc_one

M.


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Re: 2.5.65-mm4

[Andrew Morton]

"Martin J. Bligh" <mbligh@aracnet.com> wrote:
>
> profile from SDET 64:

SDET is rather irritating because a) nobody has a copy and b) we don't even
know what it does.

> 
> 82303 __down
> 42835 schedule
> 31323 __wake_up
> 26435 .text.lock.sched
> 15924 .text.lock.transaction

But judging by this, it's a rebadged dbench.  The profile is identical.

Note that the lock_kernel() contention has been drastically reduced and we're
now hitting semaphore contention.

Running `dbench 32' on the quad Xeon, this patch took the context switch rate
from 500/sec up to 125,000/sec.

I've asked Alex to put together a patch for spinlock-based locking in the
block allocator (cut-n-paste from ext2).

That will fix up lock_super(), but I suspect the main problem is the
lock_journal() in journal_start().  I haven't thought about that one yet.


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Re: 2.5.65-mm4

[Martin J. Bligh]

>> profile from SDET 64:
> 
> SDET is rather irritating because a) nobody has a copy and b) we don't
> even know what it does.

Yeah, I know. sorry ... I'm trying to get aim7 done instead.

> and b) we don't even know what it does.

Lots of shell scripty stuff, I think.

>> 82303 __down
>> 42835 schedule
>> 31323 __wake_up
>> 26435 .text.lock.sched
>> 15924 .text.lock.transaction
> 
> But judging by this, it's a rebadged dbench.  The profile is identical.

Not sure what dbench does. But I'm probably doing lots of small reads
and writes inside pagecache.
 
> Note that the lock_kernel() contention has been drastically reduced and
> we're now hitting semaphore contention.
> 
> Running `dbench 32' on the quad Xeon, this patch took the context switch
> rate from 500/sec up to 125,000/sec.
> 
> I've asked Alex to put together a patch for spinlock-based locking in the
> block allocator (cut-n-paste from ext2).

OK, sounds like a plan. Made a huge impact for ext2, and might enable
us to actually be able to see the rest of it through the sem cloud.
 
> That will fix up lock_super(), but I suspect the main problem is the
> lock_journal() in journal_start().  I haven't thought about that one yet.

Thanks,

M.

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Re: 2.5.65-mm4

[Ingo Molnar]

On Sun, 23 Mar 2003, Andrew Morton wrote:

> Note that the lock_kernel() contention has been drastically reduced and
> we're now hitting semaphore contention.
> 
> Running `dbench 32' on the quad Xeon, this patch took the context switch
> rate from 500/sec up to 125,000/sec.

note that there is _nothing_ wrong in doing 125,000 context switches per
sec, as long as performance increases over the lock_kernel() variant.

> I've asked Alex to put together a patch for spinlock-based locking in
> the block allocator (cut-n-paste from ext2).

sure, do this if it increases performance. But if it _decreases_
performance then it's plain pointless to do this just to avoid
context-switches. With the 2.4 scheduler i'd agree - avoid
context-switches like the plague. But context-switches are 100% localized
to the same CPU with the O(1) scheduler, they (should) cause (almost) no
scalability problem. The only thing this change will 'fix' is the
context-switch statistics.

plus someone might want to try some simple spin-sleep semaphore
implementation at this point. The context-switch takes roughly 2 usecs on
a typical x86 box, so i'd say spinning for 0.5 or 1.0 usecs could provide
some speedup.

	Ingo

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Re: 2.5.65-mm4

[Andrew Morton]

Ingo Molnar <mingo@elte.hu> wrote:
>
> 
> On Sun, 23 Mar 2003, Andrew Morton wrote:
> 
> > Note that the lock_kernel() contention has been drastically reduced and
> > we're now hitting semaphore contention.
> > 
> > Running `dbench 32' on the quad Xeon, this patch took the context switch
> > rate from 500/sec up to 125,000/sec.
> 
> note that there is _nothing_ wrong in doing 125,000 context switches per
> sec, as long as performance increases over the lock_kernel() variant.

Yes, but we also take a big hit before we even get to schedule(). 

Pingponging the semaphore's waitqueue lock around, doing atomic ops against
the semaphore counter, etc.

In the case of ext2 the codepath which needs to be locked is very small, and
converting it to use a per-blockgroup spinlock was a big win on the 16-way
numas, and perhaps 8-way x440's.  On 4-way xeon and ppc64 the effects were
very small indeed - 1.5% on xeon, zero on ppc64.

In the case of ext3 I am suspecting lock_journal() in JBD, not lock_super()
in the ext3 block allocator.  The hold times in there are much longer, so we
may have a more complex problem.  But until lock_super() is cleared up it is
hard to tell.

> > I've asked Alex to put together a patch for spinlock-based locking in
> > the block allocator (cut-n-paste from ext2).
> 
> sure, do this if it increases performance. But if it _decreases_
> performance then it's plain pointless to do this just to avoid
> context-switches. With the 2.4 scheduler i'd agree - avoid
> context-switches like the plague. But context-switches are 100% localized
> to the same CPU with the O(1) scheduler, they (should) cause (almost) no
> scalability problem. The only thing this change will 'fix' is the
> context-switch statistics.

The funny thing is that when this is happening we tend to clock up a lot of
idle time.  But Martin tends to not share vmstat traces with us (hint) so I
don't know if it was happening this time.


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Re: 2.5.65-mm4

[William Lee Irwin III]

On Sun, Mar 23, 2003 at 11:17:16PM -0800, Andrew Morton wrote:
> In the case of ext2 the codepath which needs to be locked is very small, and
> converting it to use a per-blockgroup spinlock was a big win on the 16-way
> numas, and perhaps 8-way x440's.  On 4-way xeon and ppc64 the effects were
> very small indeed - 1.5% on xeon, zero on ppc64.

And also very large on 32x NUMA-Q.


-- wli
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