Christopher Chan <cchan@xxxxxxxxxxxx> wrote:
>
> Mr. Morton,
>
> I'm ccing you due to the oom-killer stuff.
>
gee thanks ;)
> Previously with 2.6.7 I had to use this values in sysctl to be able to
> continue to access the box:
>
> net.ipv4.tcp_max_syn_backlog = 2048
> net.ipv4.route.gc_thresh = 65536
> net.ipv4.route.max_size = 1048576
Why?
> 2.6.9 without this values gave me similar problems with 2.6.7 without
> the above values.
What problems?
> Sample log lines below:
>
> There are multiple oom-killer lines (different pid for smtpd process)
> and the network related messages repeated until the box was rebooted
> about 45 mins later.
>
> Nov 1 03:15:58 spf5-3 kernel: oom-killer: gfp_mask=0x1d2
> Nov 1 03:15:58 spf5-3 kernel: DMA per-cpu:
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 hot: low 2, high 6, batch 1
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 cold: low 0, high 2, batch 1
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 hot: low 2, high 6, batch 1
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 cold: low 0, high 2, batch 1
> Nov 1 03:15:58 spf5-3 kernel: Normal per-cpu:
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 hot: low 32, high 96, batch 16
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 cold: low 0, high 32, batch 16
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 hot: low 32, high 96, batch 16
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 cold: low 0, high 32, batch 16
> Nov 1 03:15:58 spf5-3 kernel: HighMem per-cpu:
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 hot: low 16, high 48, batch 8
> Nov 1 03:15:58 spf5-3 kernel: cpu 0 cold: low 0, high 16, batch 8
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 hot: low 16, high 48, batch 8
> Nov 1 03:15:58 spf5-3 kernel: cpu 1 cold: low 0, high 16, batch 8
> Nov 1 03:15:58 spf5-3 kernel:
> Nov 1 03:15:58 spf5-3 kernel: Free pages: 1264kB (128kB HighMem)
> Nov 1 03:15:58 spf5-3 kernel: Active:204122 inactive:68 dirty:0
> writeback:0 unstable:0 free:316 slab:27673 mapped:204956 pagetables:22623
You ran out of memory. All your memory is in use by userspace processes.
> Nov 1 03:15:58 spf5-3 kernel: DMA free:16kB min:16kB low:32kB high:48kB
> active:10544kB inactive:0kB present:16384kB
> Nov 1 03:15:59 spf5-3 kernel: protections[]: 0 0 0
> Nov 1 03:15:59 spf5-3 kernel: Normal free:1120kB min:936kB low:1872kB
> high:2808kB active:693760kB inactive:556kB present:901120kB
> Nov 1 03:15:59 spf5-3 kernel: protections[]: 0 0 0
> Nov 1 03:15:59 spf5-3 kernel: HighMem free:128kB min:128kB low:256kB
> high:384kB active:112132kB inactive:152kB present:131072kB
> Nov 1 03:15:59 spf5-3 kernel: protections[]: 0 0 0
> Nov 1 03:15:59 spf5-3 kernel: DMA: 0*4kB 0*8kB 1*16kB 0*32kB 0*64kB
> 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 16kB
> Nov 1 03:15:59 spf5-3 kernel: Normal: 104*4kB 4*8kB 0*16kB 1*32kB
> 0*64kB 0*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 1248kB
> Nov 1 03:15:59 spf5-3 kernel: HighMem: 0*4kB 0*8kB 0*16kB 2*32kB 1*64kB
> 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 128kB
> Nov 1 03:15:59 spf5-3 kernel: Swap cache: add 0, delete 0, find 0/0,
> race 0+0
Try mounting some swapspace.
> Nov 1 03:16:00 spf5-3 kernel: Out of Memory: Killed process 21861 (smtpd).
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (flags & MSG_PEEK)
> failed at net/ipv4/tcp.c (1284)
> Nov 1 03:16:00 spf5-3 kernel: recvmsg bug: copied 1E619F78 seq 1E61A378
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (flags & MSG_PEEK)
> failed at net/ipv4/tcp.c (1284)
> Nov 1 03:16:00 spf5-3 kernel: recvmsg bug: copied 1E619F78 seq 1E61A378
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (tp->copied_seq ==
> tp->rcv_nxt || (flags & (MSG_PEEK | MSG_TRUNC))) failed at
> net/ipv4/tcp.c (1348)
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (flags & MSG_PEEK)
> failed at net/ipv4/tcp.c (1284)
> Nov 1 03:16:00 spf5-3 kernel: recvmsg bug: copied 1E619F78 seq 1E61A378
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (tp->copied_seq ==
> tp->rcv_nxt || (flags & (MSG_PEEK | MSG_TRUNC))) failed at
> net/ipv4/tcp.c (1348)
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (flags & MSG_PEEK)
> failed at net/ipv4/tcp.c (1284)
> Nov 1 03:16:00 spf5-3 kernel: recvmsg bug: copied 1E619F78 seq 1E61A378
> Nov 1 03:16:00 spf5-3 kernel: KERNEL: assertion (tp->copied_seq ==
> tp->rcv_nxt || (flags & (MSG_PEEK | MSG_TRUNC))) failed at
> net/ipv4/tcp.c (1348)
This is a networking bug.
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