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Re: oom-killer executes



What does your current free memory look like on the system? It sounds like your simply resource starved - Dustin

On 07/12/2010 12:14 AM, Paolo Galtieri wrote:
Over the last few days I have noticed that the out of memory killer task
keeps getting executed on my RHEL 5.4 system

Jul 11 18:31:00 truckin kernel: Mem-info:
Jul 11 18:31:00 truckin kernel: Node 0 DMA per-cpu:
Jul 11 18:31:00 truckin kernel: cpu 0 hot: high 0, batch 1 used:0
Jul 11 18:31:00 truckin kernel: cpu 0 cold: high 0, batch 1 used:0
Jul 11 18:31:00 truckin kernel: cpu 1 hot: high 0, batch 1 used:0
Jul 11 18:31:00 truckin kernel: cpu 1 cold: high 0, batch 1 used:0
Jul 11 18:31:00 truckin kernel: Node 0 DMA32 per-cpu:
Jul 11 18:31:00 truckin kernel: cpu 0 hot: high 186, batch 31 used:180
Jul 11 18:31:00 truckin kernel: cpu 0 cold: high 62, batch 15 used:38
Jul 11 18:31:00 truckin kernel: cpu 1 hot: high 186, batch 31 used:168
Jul 11 18:31:00 truckin kernel: cpu 1 cold: high 62, batch 15 used:15
Jul 11 18:31:00 truckin kernel: Node 0 Normal per-cpu: empty
Jul 11 18:31:00 truckin kernel: Node 0 HighMem per-cpu: empty
Jul 11 18:31:00 truckin kernel: Free pages:        7652kB (0kB HighMem)
Jul 11 18:31:00 truckin kernel: Active:133974 inactive:353502 dirty:2
writeback:0 unstable:0 free:1913 slab:9969 mapped-file:538
mapped-anon:487532 pagetables:7514
Jul 11 18:31:00 truckin kernel: Node 0 DMA free:1976kB min:28kB low:32kB
high:40kB active:0kB inactive:0kB present:10520kB pages_scanned:0
all_unreclaimable? yes
Jul 11 18:31:00 truckin kernel: lowmem_reserve[]: 0 2002 2002 2002
Jul 11 18:31:00 truckin kernel: Node 0 DMA32 free:5676kB min:5708kB
low:7132kB high:8560kB active:535896kB inactive:1414008kB present:2050848kB
pages_scanned:5262216 all_unreclaimable? yes
Jul 11 18:31:00 truckin kernel: lowmem_reserve[]: 0 0 0 0
Jul 11 18:31:00 truckin kernel: Node 0 Normal free:0kB min:0kB low:0kB
high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0
all_unreclaimable? no
Jul 11 18:31:00 truckin kernel: lowmem_reserve[]: 0 0 0 0
Jul 11 18:31:00 truckin kernel: Node 0 HighMem free:0kB min:128kB low:128kB
high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0
all_unreclaimable? no
Jul 11 18:31:00 truckin kernel: lowmem_reserve[]: 0 0 0 0
Jul 11 18:31:00 truckin kernel: Node 0 DMA: 4*4kB 7*8kB 3*16kB 4*32kB 5*64kB
1*128kB 1*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 1976kB
Jul 11 18:31:00 truckin kernel: Node 0 DMA32: 1151*4kB 0*8kB 1*16kB 1*32kB
0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 5676kB
Jul 11 18:31:00 truckin kernel: Node 0 Normal: empty
Jul 11 18:31:00 truckin kernel: Node 0 HighMem: empty
Jul 11 18:31:00 truckin kernel: 1284 pagecache pages
Jul 11 18:31:00 truckin kernel: Swap cache: add 1166071, delete 1165884,
find 72770/87468, race 0+69
Jul 11 18:31:00 truckin kernel: Free swap  = 0kB
Jul 11 18:31:00 truckin kernel: Total swap = 2031608kB
Jul 11 18:31:00 truckin kernel: Free swap:            0kB
Jul 11 18:31:00 truckin kernel: 523914 pages of RAM
Jul 11 18:31:00 truckin kernel: 9408 reserved pages
Jul 11 18:31:00 truckin kernel: 15073 pages shared
Jul 11 18:31:00 truckin kernel: 187 pages swap cached
Jul 11 18:31:00 truckin kernel: Out of memory: Killed process 29111, UID
500, (gnome-panel).
Jul 11 18:31:38 truckin gconfd (pgaltieri-29082): Resolved address
"xml:readwrite:/home/pgaltieri/.gconf" to a writable configuration source at
position 0
Jul 11 18:39:14 truckin kernel: Xorg invoked oom-killer: gfp_mask=0xd0,
order=0, oomkilladj=0
Jul 11 18:39:14 truckin kernel:
Jul 11 18:39:14 truckin kernel: Call Trace:
Jul 11 18:39:14 truckin kernel:  [<ffffffff800c7161>]
out_of_memory+0x8e/0x2f3
Jul 11 18:39:14 truckin kernel:  [<ffffffff8000f4b1>]
__alloc_pages+0x27f/0x308
Jul 11 18:39:14 truckin kernel:  [<ffffffff8002e105>] __wake_up+0x38/0x4f
Jul 11 18:39:14 truckin kernel:  [<ffffffff8003c4b1>]
__get_free_pages+0xe/0x71
Jul 11 18:39:14 truckin kernel:  [<ffffffff8001eb0b>] __pollwait+0x58/0xe2
Jul 11 18:39:14 truckin kernel:  [<ffffffff80030236>] unix_poll+0x18/0x99
Jul 11 18:39:14 truckin kernel:  [<ffffffff80011880>] do_select+0x287/0x462
Jul 11 18:39:14 truckin kernel:  [<ffffffff8001eab3>] __pollwait+0x0/0xe2
Jul 11 18:39:14 truckin kernel:  [<ffffffff8008cfa1>]
default_wake_function+0x0/0xe
Jul 11 18:39:28 truckin last message repeated 9 times
Jul 11 18:39:28 truckin kernel:  [<ffffffff800e91de>]
core_sys_select+0x1bc/0x265
Jul 11 18:39:28 truckin kernel:  [<ffffffff8000ce26>]
do_sync_read+0xc7/0x104
Jul 11 18:39:28 truckin kernel:  [<ffffffff800e06f4>]
do_readv_writev+0x26e/0x291
Jul 11 18:39:28 truckin kernel:  [<ffffffff80043aad>]
sys_rt_sigreturn+0x323/0x356
Jul 11 18:39:28 truckin kernel:  [<ffffffff80016854>] sys_select+0xc1/0x17c
Jul 11 18:39:28 truckin kernel:  [<ffffffff8005d28d>] tracesys+0xd5/0xe0
Jul 11 18:39:28 truckin kernel:

There are lots of similar backtraces in /var/log/messages.  My system:

[root truckin ~]# cat /proc/cpuinfo
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 15
model        : 4
model name    :               Intel(R) Pentium(R) D CPU 3.20GHz
stepping    : 4
cpu MHz        : 3192.161
cache size    : 1024 KB
fpu        : yes
fpu_exception    : yes
cpuid level    : 3
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall lm
constant_tsc pni monitor ds_cpl est cid cx16 xtpr
bogomips    : 6384.32
clflush size    : 64
cache_alignment    : 128
address sizes    : 36 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 15
model        : 4
model name    :               Intel(R) Pentium(R) D CPU 3.20GHz
stepping    : 4
cpu MHz        : 3192.161
cache size    : 1024 KB
physical id    : 0
siblings    : 2
core id        : 1
cpu cores    : 2
apicid        : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 5
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall lm
constant_tsc pni monitor ds_cpl est cid cx16 xtpr
bogomips    : 6384.23
clflush size    : 64
cache_alignment    : 128
address sizes    : 36 bits physical, 48 bits virtual
power management:

[root truckin ~]# cat /proc/meminfo
MemTotal:      2058024 kB
MemFree:        546028 kB
Buffers:         26840 kB
Cached:        1322780 kB
SwapCached:      20704 kB
Active:         332964 kB
Inactive:      1087384 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2058024 kB
LowFree:        546028 kB
SwapTotal:     2031608 kB
SwapFree:      1947144 kB
Dirty:            3292 kB
Writeback:           0 kB
AnonPages:       64512 kB
Mapped:          17488 kB
Slab:            59896 kB
PageTables:       9112 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   3060620 kB
Committed_AS:   420348 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    264208 kB
VmallocChunk: 34359473583 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

During the time that I've noticed this I have been trying to download one of
the iso images for RHEL6.0 Beta.  I've tried using firefox to download the
image as well as wget.  I will start the download and come back sometime
later and discover that I've been logged out.  I have also observed that
running firefox 3.6.4 (firefox-3.6.4-8) will sometimes cause my X session to
freeze up requiring me to login from another system and kill the X server in
order to use it again.  This is a problem that I have only recently
observed.

Another thing I have noticed is that quite often while doing the download
the destination file will stop getting updated.  The time stamp of the file
will not change and the file size will not update even though when I run
wireshark it shows the connection to ftp.redhat.com is still live and
packets are being received and the sequence number in the packets are
changing which implies data is arriving but not going to the file.

I have been trying to download the RHEL 6 Beta iso images since last
Thursday onto my RHEL 5.4 system and have not succeeded yet.

Has anyone else seen this issue while trying to download a large file?

Any help in trying to determine the cause and if possible a solution to the
problem is greatly appreciated.

Thanks,
Paolo



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