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Date: Wed, 25 Nov 2009 18:13:32 -0500
From: Dan Merillat <dan.merillat@...il.com>
To: KOSAKI Motohiro <kosaki.motohiro@...il.com>
Cc: linux-kernel@...r.kernel.org, Rik van Riel <riel@...hat.com>,
Norbert Preining <preining@...ic.at>,
Tomasz Chmielewski <mangoo@...g.org>,
Sven-Haegar Koch <haegar@...net.de>,
Dave Chinner <david@...morbit.com>
Subject: Re: Linux 2.6.31 - very swap-happy with plenty of free RAM
On Thu, Nov 19, 2009 at 9:36 AM, KOSAKI Motohiro
<kosaki.motohiro@...il.com> wrote:
> Hi Dan,
>
> Umm, very strange.
> I made two debug patch. can you please apply it and post following
> command output?
>
> % cat /proc/meminfo
> % cat /proc/vmstat
> % cat /proc/zoneinfo
> # cat /proc/filecache | sort -nr -k3 |head -30
As I said I can't give you the filecache info, but here's two datasets
The amount of cache is due to 1.5gb of mmaped vmware guest backing files.
First, 400mb ram "free" but still swapping out - usable with a few
pauses as apps swap back in.
meminfo
MemTotal: 3929040 kB
MemFree: 417748 kB
Buffers: 98348 kB
Cached: 2243696 kB
SwapCached: 149480 kB
Active: 1687316 kB
Inactive: 1527104 kB
Active(anon): 1042292 kB
Inactive(anon): 477736 kB
Active(file): 645024 kB
Inactive(file): 1049368 kB
Unevictable: 20 kB
Mlocked: 20 kB
SwapTotal: 3903480 kB
SwapFree: 3249496 kB
Dirty: 224 kB
Writeback: 0 kB
AnonPages: 759152 kB
Mapped: 398180 kB
Slab: 101844 kB
SReclaimable: 60864 kB
SUnreclaim: 40980 kB
PageTables: 38656 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 5868000 kB
Committed_AS: 3989292 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 302588 kB
VmallocChunk: 34359432695 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 40832 kB
DirectMap2M: 4020224 kB
vmstat
nr_free_pages 104437
nr_inactive_anon 119434
nr_active_anon 260573
nr_inactive_file 262342
nr_active_file 161256
nr_unevictable 5
nr_mlock 5
nr_anon_pages 189788
nr_mapped 99545
nr_file_pages 622881
nr_dirty 56
nr_writeback 0
nr_slab_reclaimable 15216
nr_slab_unreclaimable 10245
nr_page_table_pages 9664
nr_unstable 0
nr_bounce 0
nr_vmscan_write 13542637
nr_writeback_temp 0
numa_hit 378246197
numa_miss 0
numa_foreign 0
numa_interleave 8130
numa_local 378246197
numa_other 0
pgpgin 134039596
pgpgout 83142977
pswpin 168794
pswpout 282875
pgalloc_dma 28902
pgalloc_dma32 244979577
pgalloc_normal 135020061
pgalloc_movable 0
pgfree 380133342
pgactivate 2301807
pgdeactivate 1966072
pgfault 123713739
pgmajfault 168717
pgrefill_dma 447
pgrefill_dma32 818890
pgrefill_normal 263325
pgrefill_movable 0
pgsteal_dma 62
pgsteal_dma32 41972665
pgsteal_normal 8076187
pgsteal_movable 0
pgscan_kswapd_dma 192
pgscan_kswapd_dma32 100342332
pgscan_kswapd_normal 19655823
pgscan_kswapd_movable 0
pgscan_direct_dma 0
pgscan_direct_dma32 9364278
pgscan_direct_normal 2242788
pgscan_direct_movable 0
zone_reclaim_failed 0
pginodesteal 6375
slabs_scanned 1234816
kswapd_steal 47729503
kswapd_inodesteal 242151
pageoutrun 409691
allocstall 26919
pgrotated 283193
htlb_buddy_alloc_success 0
htlb_buddy_alloc_fail 0
unevictable_pgs_culled 9875
unevictable_pgs_scanned 0
unevictable_pgs_rescued 40104
unevictable_pgs_mlocked 42144
unevictable_pgs_munlocked 41486
unevictable_pgs_cleared 0
unevictable_pgs_stranded 0
unevictable_pgs_mlockfreed 0
zoneinfo
Node 0, zone DMA
pages free 3887
min 7
low 8
high 10
scanned 0
spanned 4096
present 3839
nr_free_pages 3887
nr_inactive_anon 15
nr_active_anon 0
nr_inactive_file 18
nr_active_file 56
nr_unevictable 0
nr_mlock 0
nr_anon_pages 7
nr_mapped 2
nr_file_pages 82
nr_dirty 0
nr_writeback 0
nr_slab_reclaimable 5
nr_slab_unreclaimable 2
nr_page_table_pages 0
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_writeback_temp 0
numa_hit 21161
numa_miss 0
numa_foreign 0
numa_interleave 0
numa_local 21161
numa_other 0
protection: (0, 3126, 3883, 3883)
pagesets
cpu: 0
count: 0
high: 0
batch: 1
vm stats threshold: 4
cpu: 1
count: 0
high: 0
batch: 1
vm stats threshold: 4
all_unreclaimable: 0
prev_priority: 12
start_pfn: 0
inactive_ratio: 1
recent_rotated_anon: 0
recent_scanned_anon: 2
recent_rotated_file: 3
recent_scanned_file: 12
Node 0, zone DMA32
pages free 100087
min 1602
low 2002
high 2403
scanned 0
spanned 1044480
present 800280
nr_free_pages 100087
nr_inactive_anon 62741
nr_active_anon 217794
nr_inactive_file 226981
nr_active_file 136874
nr_unevictable 5
nr_mlock 5
nr_anon_pages 130228
nr_mapped 83692
nr_file_pages 519311
nr_dirty 39
nr_writeback 0
nr_slab_reclaimable 10649
nr_slab_unreclaimable 5709
nr_page_table_pages 4812
nr_unstable 0
nr_bounce 0
nr_vmscan_write 10954292
nr_writeback_temp 0
numa_hit 243347959
numa_miss 0
numa_foreign 0
numa_interleave 0
numa_local 243347959
numa_other 0
protection: (0, 0, 757, 757)
pagesets
cpu: 0
count: 134
high: 186
batch: 31
vm stats threshold: 24
cpu: 1
count: 11
high: 186
batch: 31
vm stats threshold: 24
all_unreclaimable: 0
prev_priority: 12
start_pfn: 4096
inactive_ratio: 5
recent_rotated_anon: 33921
recent_scanned_anon: 77920
recent_rotated_file: 459
recent_scanned_file: 80092
Node 0, zone Normal
pages free 463
min 388
low 485
high 582
scanned 0
spanned 196608
present 193920
nr_free_pages 463
nr_inactive_anon 56678
nr_active_anon 42779
nr_inactive_file 35343
nr_active_file 24326
nr_unevictable 0
nr_mlock 0
nr_anon_pages 59553
nr_mapped 15851
nr_file_pages 103488
nr_dirty 17
nr_writeback 0
nr_slab_reclaimable 4562
nr_slab_unreclaimable 4534
nr_page_table_pages 4852
nr_unstable 0
nr_bounce 0
nr_vmscan_write 2588345
nr_writeback_temp 0
numa_hit 134877151
numa_miss 0
numa_foreign 0
numa_interleave 8130
numa_local 134877151
numa_other 0
protection: (0, 0, 0, 0)
pagesets
cpu: 0
count: 149
high: 186
batch: 31
vm stats threshold: 16
cpu: 1
count: 77
high: 186
batch: 31
vm stats threshold: 16
all_unreclaimable: 0
prev_priority: 12
start_pfn: 1048576
inactive_ratio: 1
recent_rotated_anon: 6122
recent_scanned_anon: 14889
recent_rotated_file: 491
recent_scanned_file: 9600
Second one was during a thrash storm (I think, it may not have dumped
until the end of it)
Note the kernel claims it has over 500mb free RAM that's not being
used while we swap
meminfo
MemTotal: 3929040 kB
MemFree: 544676 kB
Buffers: 123256 kB
Cached: 2097536 kB
SwapCached: 184016 kB
Active: 1703160 kB
Inactive: 1376904 kB
Active(anon): 990688 kB
Inactive(anon): 400420 kB
Active(file): 712472 kB
Inactive(file): 976484 kB
Unevictable: 20 kB
Mlocked: 20 kB
SwapTotal: 3903480 kB
SwapFree: 3023160 kB
Dirty: 6844 kB
Writeback: 112 kB
AnonPages: 740368 kB
Mapped: 455792 kB
Slab: 109176 kB
SReclaimable: 63088 kB
SUnreclaim: 46088 kB
PageTables: 39540 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 5868000 kB
Committed_AS: 4134332 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 302588 kB
VmallocChunk: 34359432695 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 40832 kB
DirectMap2M: 4020224 kB
vmstat
nr_free_pages 136138
nr_inactive_anon 100105
nr_active_anon 247672
nr_inactive_file 244146
nr_active_file 178118
nr_unevictable 5
nr_mlock 5
nr_anon_pages 185092
nr_mapped 113948
nr_file_pages 601227
nr_dirty 1711
nr_writeback 28
nr_slab_reclaimable 15772
nr_slab_unreclaimable 11522
nr_page_table_pages 9885
nr_unstable 0
nr_bounce 0
nr_vmscan_write 14020410
nr_writeback_temp 0
numa_hit 438013705
numa_miss 0
numa_foreign 0
numa_interleave 8130
numa_local 438013705
numa_other 0
pgpgin 137757163
pgpgout 89200634
pswpin 410261
pswpout 464160
pgalloc_dma 28902
pgalloc_dma32 291710526
pgalloc_normal 149182097
pgalloc_movable 0
pgfree 441058114
pgactivate 3112124
pgdeactivate 2717995
pgfault 185871068
pgmajfault 254976
pgrefill_dma 447
pgrefill_dma32 839061
pgrefill_normal 263472
pgrefill_movable 0
pgsteal_dma 62
pgsteal_dma32 42581791
pgsteal_normal 8623195
pgsteal_movable 0
pgscan_kswapd_dma 192
pgscan_kswapd_dma32 115131371
pgscan_kswapd_normal 24244847
pgscan_kswapd_movable 0
pgscan_direct_dma 0
pgscan_direct_dma32 9390346
pgscan_direct_normal 2249551
pgscan_direct_movable 0
zone_reclaim_failed 0
pginodesteal 6375
slabs_scanned 2123520
kswapd_steal 48883166
kswapd_inodesteal 310652
pageoutrun 426393
allocstall 26962
pgrotated 464504
htlb_buddy_alloc_success 0
htlb_buddy_alloc_fail 0
unevictable_pgs_culled 9875
unevictable_pgs_scanned 0
unevictable_pgs_rescued 40104
unevictable_pgs_mlocked 42211
unevictable_pgs_munlocked 41486
unevictable_pgs_cleared 0
unevictable_pgs_stranded 0
unevictable_pgs_mlockfreed 0
zoneinfo
Node 0, zone DMA
pages free 3888
min 7
low 8
high 10
scanned 0
spanned 4096
present 3839
nr_free_pages 3888
nr_inactive_anon 14
nr_active_anon 0
nr_inactive_file 18
nr_active_file 56
nr_unevictable 0
nr_mlock 0
nr_anon_pages 6
nr_mapped 3
nr_file_pages 82
nr_dirty 0
nr_writeback 0
nr_slab_reclaimable 5
nr_slab_unreclaimable 2
nr_page_table_pages 0
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_writeback_temp 0
numa_hit 21161
numa_miss 0
numa_foreign 0
numa_interleave 0
numa_local 21161
numa_other 0
protection: (0, 3126, 3883, 3883)
pagesets
cpu: 0
count: 0
high: 0
batch: 1
vm stats threshold: 4
cpu: 1
count: 0
high: 0
batch: 1
vm stats threshold: 4
all_unreclaimable: 0
prev_priority: 7
start_pfn: 0
inactive_ratio: 1
recent_rotated_anon: 0
recent_scanned_anon: 2
recent_rotated_file: 3
recent_scanned_file: 12
Node 0, zone DMA32
pages free 117449
min 1602
low 2002
high 2403
scanned 0
spanned 1044480
present 800280
nr_free_pages 117449
nr_inactive_anon 51601
nr_active_anon 208680
nr_inactive_file 210820
nr_active_file 154607
nr_unevictable 5
nr_mlock 5
nr_anon_pages 128789
nr_mapped 98197
nr_file_pages 508828
nr_dirty 1501
nr_writeback 0
nr_slab_reclaimable 11187
nr_slab_unreclaimable 6932
nr_page_table_pages 4798
nr_unstable 0
nr_bounce 0
nr_vmscan_write 11175938
nr_writeback_temp 0
numa_hit 288976607
numa_miss 0
numa_foreign 0
numa_interleave 0
numa_local 288976607
numa_other 0
protection: (0, 0, 757, 757)
pagesets
cpu: 0
count: 182
high: 186
batch: 31
vm stats threshold: 24
cpu: 1
count: 166
high: 186
batch: 31
vm stats threshold: 24
all_unreclaimable: 0
prev_priority: 7
start_pfn: 4096
inactive_ratio: 5
recent_rotated_anon: 34440
recent_scanned_anon: 39630
recent_rotated_file: 416
recent_scanned_file: 59261
Node 0, zone Normal
pages free 14801
min 388
low 485
high 582
scanned 0
spanned 196608
present 193920
nr_free_pages 14801
nr_inactive_anon 48490
nr_active_anon 38992
nr_inactive_file 33308
nr_active_file 23455
nr_unevictable 0
nr_mlock 0
nr_anon_pages 56297
nr_mapped 15748
nr_file_pages 92317
nr_dirty 210
nr_writeback 28
nr_slab_reclaimable 4580
nr_slab_unreclaimable 4588
nr_page_table_pages 5087
nr_unstable 0
nr_bounce 0
nr_vmscan_write 2844472
nr_writeback_temp 0
numa_hit 149016012
numa_miss 0
numa_foreign 0
numa_interleave 8130
numa_local 149016012
numa_other 0
protection: (0, 0, 0, 0)
pagesets
cpu: 0
count: 28
high: 186
batch: 31
vm stats threshold: 16
cpu: 1
count: 61
high: 186
batch: 31
vm stats threshold: 16
all_unreclaimable: 0
prev_priority: 7
start_pfn: 1048576
inactive_ratio: 1
recent_rotated_anon: 8094
recent_scanned_anon: 17955
recent_rotated_file: 229
recent_scanned_file: 14296
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