Re: [PATCH] fix spurious OOM kills

[Martin MOKREJŠ]

Thomas Gleixner wrote:
> On Sat, 2004-11-20 at 00:30 +0100, Martin MOKREJŠ wrote:
>
> > OK, I can say kernel 2.6.7, 2.6.8.1, 2.6.9-rc1 kill just the RNAsubopt
> > application in my test.
> >
> > 2.6.9-rc2 kills RNAsubopt and also two xterms, one running vmstat,
> > the other is parent of RNAsubopt program I used to eat memory with.
> >
> > 2.6.9 has killed just those 2 xterms, as a sideeffect the RNAsubopt
> > got killed as parent shell got killed.
> >
> > 2.6.10-rc1 killed all three.
> >
> > I conclude the major problem got introduced between
> > 2.6.9-rc1 and 2.6.9-rc2.
>
>
> Can you please try 2.6.10-rc2-mm2 + the patch I posted yesterday night ?
> It will still kill RNAsubopt, but it should not longer touch the xterm,
> which runs vmstat.

No, it doesn't help at all! See attached file.

oom-killer: gfp_mask=0xd2
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu:
cpu 0 hot: low 14, high 42, batch 7
cpu 0 cold: low 0, high 14, batch 7

Free pages:        3916kB (112kB HighMem)
Active:131900 inactive:121851 dirty:0 writeback:0 unstable:0 free:979 slab:1918 mapped:253638 pagetables:794
DMA free:68kB min:68kB low:84kB high:100kB active:5388kB inactive:5432kB present:16384kB pages_scanned:12292 all_unreclaimable? yes
protections[]: 0 0 0
Normal free:3736kB min:3756kB low:4692kB high:5632kB active:457320kB inactive:416944kB present:901120kB pages_scanned:906311 all_unreclaimable? yes
protections[]: 0 0 0
HighMem free:112kB min:128kB low:160kB high:192kB active:64892kB inactive:65028kB present:131044kB pages_scanned:134185 all_unreclaimable? yes
protections[]: 0 0 0
DMA: 1*4kB 0*8kB 0*16kB 0*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 68kB
Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 1*128kB 0*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3736kB
HighMem: 0*4kB 0*8kB 1*16kB 1*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 112kB
Swap cache: add 293354, delete 293354, find 65/84, race 0+0
Out of Memory: Killed process 6612 (RNAsubopt).
Out of Memory: Killed process 6603 (bash).
oom-killer: gfp_mask=0x1d2
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu:
cpu 0 hot: low 14, high 42, batch 7
cpu 0 cold: low 0, high 14, batch 7

Free pages:        3916kB (112kB HighMem)
Active:131832 inactive:121892 dirty:0 writeback:38 unstable:0 free:979 slab:1918 mapped:253573 pagetables:790
DMA free:68kB min:68kB low:84kB high:100kB active:5388kB inactive:5432kB present:16384kB pages_scanned:12292 all_unreclaimable? yes
protections[]: 0 0 0
Normal free:3736kB min:3756kB low:4692kB high:5632kB active:457080kB inactive:417076kB present:901120kB pages_scanned:906479 all_unreclaimable? yes
protections[]: 0 0 0
HighMem free:112kB min:128kB low:160kB high:192kB active:64860kB inactive:65060kB present:131044kB pages_scanned:134217 all_unreclaimable? yes
protections[]: 0 0 0
DMA: 1*4kB 0*8kB 0*16kB 0*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 68kB
Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 1*128kB 0*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3736kB
HighMem: 0*4kB 0*8kB 1*16kB 1*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 112kB
Swap cache: add 293419, delete 293381, find 65/84, race 0+0
Out of Memory: Killed process 6598 (FvwmPager).
Out of Memory: Killed process 6599 (xterm).
Out of Memory: Killed process 6606 (xterm).
Out of Memory: Killed process 6564 (fvwm2).
mtrr: no MTRR for d8000000,2000000 found
[drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held
[drm:drm_unlock] *ERROR* Process 6536 using kernel context 0