 | | | Odd kernel messages | Odd kernel messages 2007-02-26 - By Lawrence Houston
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On Sun, 25 Feb 2007, Victor Orgos wrote:
> I've got a webserver box and I noticed the following on the console the
> other day. The box has 512MB of ram and about a 1gb of swap. Nothing has
> misbehaved to my knowledge so the messages are odd.
>
> Everything is up2date except the kernel 2.4.21-27.0.4.EL which I am
> planning to upgrade soon. Regarding memory, top says:
>
> Mem: 513324k av, 504804k used, 8520k free, 0k shrd, 137276k buff
> 339404k actv, 73288k in_d, 9584k in_c
> Swap: 1020024k av, 1380k used, 1018644k
> free 186544k cached
>
> which looks ok to me. Anyway, here are the kernel messages. It repeats
> over a number of minutes and it has not happened again since. Also the
> SysRq function is disabled.
>
>
> Feb 21 10:13:21 www1 kernel: Mem-info:
> Feb 21 10:13:21 www1 kernel: Zone:DMA freepages: 3128 min: 1055 low: 1087
high: 1119
> Feb 21 10:13:21 www1 kernel: Zone:Normal freepages: 27324 min: 510 low:
2237 high: 3228
> Feb 21 10:13:21 www1 kernel: Zone:HighMem freepages: 0 min: 0 low:
0 high: 0
> Feb 21 10:13:21 www1 kernel: Free pages: 30452 ( 0 HighMem)
> Feb 21 10:13:21 www1 kernel: ( Active: 52945/8809, inactive_laundry: 2667,
inactive_clean: 0, free: 30452 )
> Feb 21 10:13:21 www1 kernel: aa:9 ac:141 id:0 il:5 ic:0 fr:3128
> Feb 21 10:13:21 www1 kernel: aa:29794 ac:23001 id:8809 il:2662 ic:0 fr:27324
> Feb 21 10:13:21 www1 kernel: aa:0 ac:0 id:0 il:0 ic:0 fr:0
> Feb 21 10:13:21 www1 kernel: 234*4kB 201*8kB 139*16kB 72*32kB 17*64kB 2*128kB
0*256kB 0*512kB 0*1024kB 0*2048kB 1*4096kB = 12512kB)
> Feb 21 10:13:21 www1 kernel: 70*4kB 7*8kB 1460*16kB 2115*32kB 242*64kB 5
*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 109296kB)
> Feb 21 10:13:21 www1 kernel: Swap cache: add 71784, delete 71594, find26486
/57799, race 0+0
> Feb 21 10:13:21 www1 kernel: 31557 pages of slabcache
> Feb 21 10:13:21 www1 kernel: 166 pages of kernel stacks
> Feb 21 10:13:21 www1 kernel: 553 lowmem pagetables, 0 highmem pagetables
> Feb 21 10:13:21 www1 kernel: Free swap: 1018740kB
> Feb 21 10:13:22 www1 kernel: 131056 pages of RAM
> Feb 21 10:13:22 www1 kernel: 0 pages of HIGHMEM
> Feb 21 10:13:22 www1 kernel: 2725 reserved pages
> Feb 21 10:13:22 www1 kernel: 81790 pages shared
> Feb 21 10:13:22 www1 kernel: 190 pages swap cached
For close to 6 Hours our RHEL4 Host was generating similar SYSLOG Entries:
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
Feb 25 22:52:43 XXXXXX kernel: oom-killer: gfp_mask=0xd1
Feb 25 22:52:43 XXXXXX kernel: Mem-info:
Feb 25 22:52:43 XXXXXX kernel: DMA per-cpu:
Feb 25 22:52:43 XXXXXX kernel: cpu 0 hot: low 2, high 6, batch 1
Feb 25 22:52:43 XXXXXX kernel: cpu 0 cold: low 0, high 2, batch 1
Feb 25 22:52:43 XXXXXX kernel: Normal per-cpu:
Feb 25 22:52:43 XXXXXX kernel: cpu 0 hot: low 32, high 96, batch 16
Feb 25 22:52:43 XXXXXX kernel: cpu 0 cold: low 0, high 32, batch 16
Feb 25 22:52:43 XXXXXX kernel: HighMem per-cpu:
Feb 25 22:52:43 XXXXXX kernel: cpu 0 hot: low 32, high 96, batch 16
Feb 25 22:52:43 XXXXXX kernel: cpu 0 cold: low 0, high 32, batch 16
Feb 25 22:52:43 XXXXXX kernel:
Feb 25 22:52:43 XXXXXX kernel: Free pages: 1984kB (896kB HighMem)
Feb 25 22:52:43 XXXXXX kernel: Active:92848 inactive:340371 dirty:106793
writeback:102344 unstable:0 free:496 slab:79929 mapped:62611 pagetables:810
Feb 25 22:52:43 XXXXXX kernel: DMA free:16kB min:16kB low:32kB high:48kB active
:0kB inactive:5096kB present:16384kB pages_scanned:5181 all_unreclaimable? yes
Feb 25 22:52:43 XXXXXX kernel: protections[]: 0 0 0
Feb 25 22:52:43 XXXXXX kernel: Normal free:1072kB min:936kB low:1872kB high
:2808kB active:114900kB inactive:444940kB present:901120kB pages_scanned:33 all
_unreclaimable? no
Feb 25 22:52:43 XXXXXX kernel: protections[]: 0 0 0
Feb 25 22:52:43 XXXXXX kernel: HighMem free:896kB min:512kB low:1024kB high
:1536kB active:256492kB inactive:911448kB present:1178152kB pages_scanned:0 all
_unreclaimable? no
Feb 25 22:52:43 XXXXXX kernel: protections[]: 0 0 0
Feb 25 22:52:43 XXXXXX kernel: DMA: 2*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0
*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 16kB
Feb 25 22:52:43 XXXXXX kernel: Normal: 48*4kB 34*8kB 4*16kB 1*32kB 2*64kB 1
*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1072kB
Feb 25 22:52:43 XXXXXX kernel: HighMem: 96*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0
*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 896kB
Feb 25 22:52:43 XXXXXX kernel: Swap cache: add 17813, delete 17320, find 4282
/5460, race 0+0
Feb 25 22:52:43 XXXXXX kernel: 0 bounce buffer pages
Feb 25 22:52:43 XXXXXX kernel: Free swap: 2010708kB
Feb 25 22:52:43 XXXXXX kernel: 523914 pages of RAM
Feb 25 22:52:43 XXXXXX kernel: 294538 pages of HIGHMEM
Feb 25 22:52:43 XXXXXX kernel: 5369 reserved pages
Feb 25 22:52:43 XXXXXX kernel: 421747 pages shared
Feb 25 22:52:43 XXXXXX kernel: 493 pages swap cached
Feb 25 22:52:43 XXXXXX kernel: Out of Memory: Killed process 26636 (setiathome
-5.15).
Feb 25 22:52:43 XXXXXX kernel: Out of Memory: Killed process 26635 (setiathome
-5.15).
Feb 25 22:52:43 XXXXXX kernel: Out of Memory: Killed process 26637 (setiathome
-5.15).
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
The System is a Dell Precision 370 where the non-Red Hat Softwares include
the nVidia Video Driver provided by DELL and BOINC/SETI@(protected) (V5.15 KWSN
for SSE2 Client). System Load from the SETI@(protected) Client was compounded by
a large USB 2.0 Drive to USB 1.1 Drive Transfer being performed in the
Background. This extra load was also causing SENDMAIL to generate System
Messages such as the following one:
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
Feb 25 19:32:41 XXXXXX sendmail[11620]: rejecting connections on daemon MTA:
load average: 12
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
The SYSLOG Entries terminated when the very last USB to USB Transfer
completed, although that very last USB to USB Transfer was begun well
before the SYSLOG Entries started appearing (after other USB to USB
Transfers had already been started and completed).
Lawrence Houston -- (houston@(protected))
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