From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: 2.5.33-mm3 dbench hang and 2.5.33 page allocation failures From: Steven Cole In-Reply-To: <3D77B28F.488933FB@zip.com.au> References: <1031250156.2799.86.camel@spc9.esa.lanl.gov> <1031253714.1990.116.camel@spc9.esa.lanl.gov> <3D77B28F.488933FB@zip.com.au> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: 06 Sep 2002 08:14:55 -0600 Message-Id: <1031321695.1984.132.camel@spc9.esa.lanl.gov> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org List-ID: On Thu, 2002-09-05 at 13:37, Andrew Morton wrote: > > grr. I run dbench all night, so any insight you can get into this > would be appreciated. (I've had a few hangs, but they're due > to bust disk drivers, aic7xxx not handling IO errors correctly, etc) Double grr. I just ran 2.5.33-mm4 and got the hang at dbench 8. And in my haste, I forgot to enable sysrq after boot. > > > BTW, the note in Documentation/sysrq.txt about not needing to enable > > /proc/sys/kernel/sysrq anymore appears to be incorrect. I had to set > > this to 1 as it was set to 0 on boot. > > grep your initscripts. Some distros turn it off by hand. [root@spc5 steven]# find /etc -name "*" | xargs grep sysrq /etc/sysctl.conf:kernel.sysrq = 0 This is from RH 7.3. Fixed. Thanks. For what it's worth, I ran the output from sysrq-p (2.5.33-mm3 yesterday) through ksymoops, and here is the result. I typed those numbers in manually. I'll try to get time to set up a serial console today. Steven [steven@spc5 linux-2.5.33-mm3]$ ksymoops -K -L -O -v vmlinux -m System.map ] CPU:1 EFLASHS: 00000202 Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EAX: eaf09f88 EBX: 00000000 ECX: 00000020 edx: 00000400 ESI: eaf09f88 EDI: 000065c2 EBP: eaf09fd0 DS: 0068 es: 0068 CR0: 8005003b CR2: 40262000 CR3: 1e5b5000 CR4: 00000690 Call Trace: [] [] [] [] [] [] [] Warning (Oops_read): Code line not seen, dumping what data is available >>EIP; c015a388 <.text.lock.fs_writeback+47/cf> <===== Trace; c013bb1a Trace; c013b73b <__pdflush+12b/1d0> Trace; c013b7e0 Trace; c013b7eb Trace; c013baa0 Trace; 0000000c01072284 Trace; c0107289 1 warning issued. Results may not be reliable. -- 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/