Re: [Bug 5494] New: OOM killer kills process on kernel boot up and system performance is very low

[Badari Pulavarty <pbadari@gmail.com>]

On Tue, 2005-10-25 at 10:45 -0700, Andrew Morton wrote:
> bugme-daemon@kernel-bugs.osdl.org wrote:
> >
> >  http://bugzilla.kernel.org/show_bug.cgi?id=5494
> > 
> >             Summary: OOM killer kills process on kernel boot up and system
> >                      performance is very low
> >      Kernel Version: 2.6.14-rc4
> 
> You have an enormous memory leak.
> 
> 
> Active:1452 inactive:929 dirty:3 writeback:717 unstable:0 free:7065 slab:2779 mapped:1356 pagetables:464
> DMA free:6160kB min:68kB low:84kB high:100kB active:0kB inactive:2348kB present:16384kB pages_scanned:1o
> lowmem_reserve[]: 0 880 1519
> Normal free:21604kB min:3756kB low:4692kB high:5632kB active:276kB inactive:188kB present:901120kB pages
> lowmem_reserve[]: 0 0 5119
> HighMem free:496kB min:512kB low:640kB high:768kB active:5532kB inactive:1052kB present:655296kB pages_s
> lowmem_reserve[]: 0 0 0
> DMA: 2*4kB 3*8kB 1*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 1*4096kB = 6160kB
> Normal: 1*4kB 20*8kB 36*16kB 10*32kB 3*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 4*4096kB = 21604kB
> HighMem: 0*4kB 0*8kB 1*16kB 1*32kB 1*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 496kB
> Swap cache: add 51244, delete 50404, find 25442/32337, race 0+13
> 
> And it's leaking highmem too, so it has to be user memory: pagecache or
> anoymous RAM.
> 
> I'm not too sure what to do really - something odd is happening because if
> this was happening generally then everyone in the world would be reporting
> it.
> 
> I'd suggest you try switching compiler versions, try disabling unneeded
> features in .config, see if you can identify any one which causes the leak.
> Ideally, use `git bisect' to identify when the problem started occurring. 
> 
> All very strange.
> 
> btw, what is this:
> 
> Starting readahead:  [  OK  ]

"readahead" is a init script in RedHat distro which does

    /usr/sbin/readahead `cat /etc/readahead.files` &

I guess it reads the files into pagecache.

(readahead(2)  -  Read  in advance one or more pages of a file
       within a page cache)


Thanks,
Badari

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