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Date: Thu, 17 Mar 2011 14:11:39 +0000
From: Preeti Khurana <Preeti.Khurana@...vus.com>
To: "paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
CC: "mel@....ul.ie" <mel@....ul.ie>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: rcu_sched_state detected stall on CPU issue
> > > Any thoughts or recent patches that might help?
> >
> > We fixed a kswapd infinite loop issue when memory is fragmented at
> 2.6.38.
> > Could you please try following commits? (all are mm/vmscan.c change)
> >
> > commit dc83edd941f412e938841b4989be24aa288a1aa6
> > commit 355b09c47a0cbb73b3e65a57c03f157f2e7ddb0b
> > commit 4d40502ea580c35414a1466d86f96484910ebaec
> > commit 0abdee2bd4118366c62349a304f81537be69af33
> > commit 1741c87757448cedd03224f01586504f9256415d
> > commit 9950474883e027e6e728cbcff25f7f2bf0c96530
>
> Thank you, Kosaki!
I will try patching with the commits & test the same, though patches don't cleanly fit because they are on top of the changes which are not there in 2.6.35 ( have come in 2.6.37), so it's a lttle challenge.
Meanwhile, I am trying out the changes specified in thread https://lkml.org/lkml/2011/1/6/131 because I think that also might issue.
>
> > And, your attached file and your quoted mail don't have /proc/zoneinfo
> > information. then I have no way to confirn his environment is heavy
> > fragmented or not. If possible, could you please get /proc/zoneinfo
> > info?
>
> Preeti, could you please send this info and try out the above patches?
Output of /proc/zoneinfo at the time of stall :
Node 0, zone Normal
pages free 7484
min 4982
low 6227
high 7473
scanned 0
spanned 12582912
present 12410880
nr_free_pages 7422
nr_inactive_anon 42096
nr_active_anon 882918
nr_inactive_file 5635172
nr_active_file 5635111
nr_unevictable 0
nr_mlock 0
nr_anon_pages 924987
nr_mapped 1208
nr_file_pages 11270146
nr_dirty 49494
nr_writeback 0
nr_slab_reclaimable 169648
nr_slab_unreclaimable 4202
nr_page_table_pages 2271
nr_kernel_stack 295
nr_unstable 0
nr_bounce 0
nr_vmscan_write 291
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 27
numa_hit 225959693
numa_miss 20838462
numa_foreign 69636123
numa_interleave 27282
numa_local 225959685
numa_other 20838470
protection: (0, 0, 0, 0)
pagesets
cpu: 0
count: 172
high: 186
batch: 31
vm stats threshold: 100
cpu: 1
count: 165
high: 186
batch: 31
vm stats threshold: 100
cpu: 2
count: 60
high: 186
batch: 31
vm stats threshold: 100
cpu: 3
count: 0
high: 186
batch: 31
vm stats threshold: 100
cpu: 4
count: 63
high: 186
batch: 31
vm stats threshold: 100
cpu: 5
count: 94
high: 186
batch: 31
vm stats threshold: 100
cpu: 6
count: 63
high: 186
batch: 31
vm stats threshold: 100
cpu: 7
count: 0
high: 186
batch: 31
vm stats threshold: 100
cpu: 8
count: 55
high: 186
batch: 31
vm stats threshold: 100
cpu: 9
count: 0
high: 186
batch: 31
vm stats threshold: 100
cpu: 10
count: 41
high: 186
batch: 31
vm stats threshold: 100
cpu: 11
count: 112
high: 186
batch: 31
vm stats threshold: 100
cpu: 12
count: 75
high: 186
batch: 31
vm stats threshold: 100
cpu: 13
count: 18
high: 186
batch: 31
vm stats threshold: 100
cpu: 14
count: 171
high: 186
batch: 31
vm stats threshold: 100
cpu: 15
count: 0
high: 186
batch: 31
vm stats threshold: 100
all_unreclaimable: 0
prev_priority: 12
start_pfn: 12845056
inactive_ratio: 21
Node 1, zone DMA
pages free 3979
min 1
low 1
high 1
scanned 0
spanned 4095
present 3943
nr_free_pages 3979
nr_inactive_anon 0
nr_active_anon 0
nr_inactive_file 0
nr_active_file 0
nr_unevictable 0
nr_mlock 0
nr_anon_pages 0
nr_mapped 0
nr_file_pages 0
nr_dirty 0
nr_writeback 0
nr_slab_reclaimable 0
nr_slab_unreclaimable 0
nr_page_table_pages 0
nr_kernel_stack 0
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 0
numa_hit 0
numa_miss 0
numa_foreign 0
numa_interleave 0
numa_local 0
numa_other 0
protection: (0, 2987, 48437, 48437)
pagesets
cpu: 0
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 1
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 2
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 3
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 4
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 5
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 6
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 7
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 8
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 9
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 10
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 11
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 12
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 13
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 14
count: 0
high: 0
batch: 1
vm stats threshold: 10
cpu: 15
count: 0
high: 0
batch: 1
vm stats threshold: 10
all_unreclaimable: 1
prev_priority: 12
start_pfn: 1
inactive_ratio: 1
Node 1, zone DMA32
pages free 45968
min 307
low 383
high 460
scanned 0
spanned 1044480
present 764849
nr_free_pages 45968
nr_inactive_anon 9708
nr_active_anon 38161
nr_inactive_file 291211
nr_active_file 291169
nr_unevictable 0
nr_mlock 0
nr_anon_pages 47869
nr_mapped 50
nr_file_pages 582385
nr_dirty 1897
nr_writeback 0
nr_slab_reclaimable 81872
nr_slab_unreclaimable 115
nr_page_table_pages 98
nr_kernel_stack 2
nr_unstable 0
nr_bounce 0
nr_vmscan_write 116
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 0
numa_hit 6109982
numa_miss 9113118
numa_foreign 0
numa_interleave 0
numa_local 6109665
numa_other 9113435
protection: (0, 0, 45450, 45450)
pagesets
cpu: 0
count: 65
high: 186
batch: 31
vm stats threshold: 60
cpu: 1
count: 181
high: 186
batch: 31
vm stats threshold: 60
cpu: 2
count: 46
high: 186
batch: 31
vm stats threshold: 60
cpu: 3
count: 27
high: 186
batch: 31
vm stats threshold: 60
cpu: 4
count: 78
high: 186
batch: 31
vm stats threshold: 60
cpu: 5
count: 33
high: 186
batch: 31
vm stats threshold: 60
cpu: 6
count: 0
high: 186
batch: 31
vm stats threshold: 60
cpu: 7
count: 57
high: 186
batch: 31
vm stats threshold: 60
cpu: 8
count: 90
high: 186
batch: 31
vm stats threshold: 60
cpu: 9
count: 166
high: 186
batch: 31
vm stats threshold: 60
cpu: 10
count: 65
high: 186
batch: 31
vm stats threshold: 60
cpu: 11
count: 25
high: 186
batch: 31
vm stats threshold: 60
cpu: 12
count: 29
high: 186
batch: 31
vm stats threshold: 60
cpu: 13
count: 29
high: 186
batch: 31
vm stats threshold: 60
cpu: 14
count: 0
high: 186
batch: 31
vm stats threshold: 60
cpu: 15
count: 77
high: 186
batch: 31
vm stats threshold: 60
all_unreclaimable: 0
prev_priority: 12
start_pfn: 4096
inactive_ratio: 4
Node 1, zone Normal
pages free 6028
min 4670
low 5837
high 7005
scanned 0
spanned 11796480
present 11635200
nr_free_pages 6028
nr_inactive_anon 27762
nr_active_anon 554870
nr_inactive_file 5417543
nr_active_file 5416505
nr_unevictable 0
nr_mlock 0
nr_anon_pages 582591
nr_mapped 2512
nr_file_pages 10834147
nr_dirty 24700
nr_writeback 0
nr_slab_reclaimable 169345
nr_slab_unreclaimable 1736
nr_page_table_pages 1640
nr_kernel_stack 32
nr_unstable 0
nr_bounce 0
nr_vmscan_write 143
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 45
numa_hit 154438673
numa_miss 60523005
numa_foreign 20838462
numa_interleave 27227
numa_local 154411416
numa_other 60550262
protection: (0, 0, 0, 0)
pagesets
cpu: 0
count: 149
high: 186
batch: 31
vm stats threshold: 100
cpu: 1
count: 154
high: 186
batch: 31
vm stats threshold: 100
cpu: 2
count: 43
high: 186
batch: 31
vm stats threshold: 100
cpu: 3
count: 175
high: 186
batch: 31
vm stats threshold: 100
cpu: 4
count: 46
high: 186
batch: 31
vm stats threshold: 100
cpu: 5
count: 57
high: 186
batch: 31
vm stats threshold: 100
cpu: 6
count: 0
high: 186
batch: 31
vm stats threshold: 100
cpu: 7
count: 104
high: 186
batch: 31
vm stats threshold: 100
cpu: 8
count: 92
high: 186
batch: 31
vm stats threshold: 100
cpu: 9
count: 21
high: 186
batch: 31
vm stats threshold: 100
cpu: 10
count: 147
high: 186
batch: 31
vm stats threshold: 100
cpu: 11
count: 168
high: 186
batch: 31
vm stats threshold: 100
cpu: 12
count: 0
high: 186
batch: 31
vm stats threshold: 100
count: 92
high: 186
batch: 31
vm stats threshold: 100
cpu: 9
count: 21
high: 186
batch: 31
vm stats threshold: 100
cpu: 10
count: 147
high: 186
batch: 31
vm stats threshold: 100
cpu: 11
count: 168
high: 186
batch: 31
vm stats threshold: 100
cpu: 12
count: 0
high: 186
batch: 31
vm stats threshold: 100
cpu: 13
count: 46
high: 186
batch: 31
vm stats threshold: 100
cpu: 14
count: 146
high: 186
batch: 31
vm stats threshold: 100
cpu: 15
count: 180
high: 186
batch: 31
vm stats threshold: 100
all_unreclaimable: 0
prev_priority: 12
start_pfn: 1048576
inactive_ratio: 20
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