Re: Important news regarding the two different patches
From: M. Vefa Bicakci
Date: Mon Sep 06 2010 - 21:35:10 EST
On 06/09/10 02:43 PM, Rafael J. Wysocki wrote:
> On Monday, September 06, 2010, M. Vefa Bicakci wrote:
>> [snip]
>>
>> Patch 1:
>> http://lkml.org/lkml/2010/9/5/86
>>
>> Patch 2:
>> http://kerneltrap.org/mailarchive/linux-kernel/2010/9/4/4615426
>>
>> The first of these was prepared by Minchan Kim, and it fixes
>> the issue; i.e. no hangs during hibernation with a full tmpfs.
>
> We've already agreed that this patch should be applied.
>
>> However, the second patch, prepared by Rafael Wysocki, does *not*
>> fix the problem. I still experience hangs with a full tmpfs upon
>> hibernation.
>
> So we still manage to trigger OOM with this approach.
>
>> As always, I am willing to test newer patches and help in debugging
>> this issue.
>
> What happens if you apply them both at the same time?
Hello,
When I apply both of the patches, then I don't get any hangs with
hibernation. However, I do get another problem, which I am not sure
is related or not. I should note that I haven't experienced this
with only the vmscan.c patch, but maybe I haven't repeated my test
enough times.
One test consists of an automated run of 7 hibernate/thaw cycles.
Here's what I got in dmesg in two of the iterations in one test.
Sorry for the long e-mail and the long lines.
=== 8< ===
[ 166.512085] PM: Hibernation mode set to 'reboot'
[ 166.516503] PM: Marking nosave pages: 000000000009f000 - 0000000000100000
[ 166.517654] PM: Basic memory bitmaps created
[ 166.518781] PM: Syncing filesystems ... done.
[ 166.546308] Freezing user space processes ... (elapsed 0.01 seconds) done.
[ 166.559596] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[ 166.571649] PM: Preallocating image memory...
[ 185.712457] iwl3945: page allocation failure. order:0, mode:0xd0
[ 185.714564] Pid: 1225, comm: iwl3945 Not tainted 2.6.35.4-test-mm5v2-vmscan+snapshot-dirty #7
[ 185.715741] Call Trace:
[ 185.716853] [<c019aa67>] ? __alloc_pages_nodemask+0x577/0x630
[ 185.718126] [<f8a562c5>] ? iwl3945_rx_allocate+0x75/0x240 [iwl3945]
[ 185.719379] [<c03f0516>] ? schedule+0x356/0x730
[ 185.720556] [<f8a56d50>] ? iwl3945_rx_replenish+0x20/0x50 [iwl3945]
[ 185.721914] [<f8a56dbc>] ? iwl3945_bg_rx_replenish+0x3c/0x50 [iwl3945]
[ 185.723929] [<c014b167>] ? worker_thread+0x117/0x1f0
[ 185.725745] [<f8a56d80>] ? iwl3945_bg_rx_replenish+0x0/0x50 [iwl3945]
[ 185.727097] [<c014ebd0>] ? autoremove_wake_function+0x0/0x40
[ 185.728468] [<c014b050>] ? worker_thread+0x0/0x1f0
[ 185.730235] [<c014e854>] ? kthread+0x74/0x80
[ 185.731601] [<c014e7e0>] ? kthread+0x0/0x80
[ 185.732919] [<c0103cb6>] ? kernel_thread_helper+0x6/0x10
[ 185.734851] Mem-Info:
[ 185.736144] DMA per-cpu:
[ 185.737439] CPU 0: hi: 0, btch: 1 usd: 0
[ 185.738635] CPU 1: hi: 0, btch: 1 usd: 0
[ 185.740296] Normal per-cpu:
[ 185.741560] CPU 0: hi: 186, btch: 31 usd: 173
[ 185.742752] CPU 1: hi: 186, btch: 31 usd: 49
[ 185.744092] HighMem per-cpu:
[ 185.745897] CPU 0: hi: 186, btch: 31 usd: 159
[ 185.747239] CPU 1: hi: 186, btch: 31 usd: 170
[ 185.748547] active_anon:136410 inactive_anon:34149 isolated_anon:0
[ 185.748549] active_file:689 inactive_file:344 isolated_file:0
[ 185.748550] unevictable:0 dirty:0 writeback:392 unstable:0
[ 185.748551] free:1928 slab_reclaimable:933 slab_unreclaimable:1680
[ 185.748552] mapped:952 shmem:168120 pagetables:304 bounce:0
[ 185.755444] DMA free:3516kB min:64kB low:80kB high:96kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15804kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:8kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 185.759708] lowmem_reserve[]: 0 865 3022 3022
[ 185.761135] Normal free:3444kB min:3728kB low:4660kB high:5592kB active_anon:0kB inactive_anon:0kB active_file:52kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:885944kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:0kB slab_reclaimable:3732kB slab_unreclaimable:6712kB kernel_stack:1480kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:96 all_unreclaimable? no
[ 185.765935] lowmem_reserve[]: 0 0 17259 17259
[ 185.767626] HighMem free:628kB min:512kB low:2836kB high:5160kB active_anon:545256kB inactive_anon:136444kB active_file:2704kB inactive_file:1376kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2209236kB mlocked:0kB dirty:0kB writeback:1416kB mapped:3804kB shmem:671948kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:1216kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:32 all_unreclaimable? no
[ 185.773232] lowmem_reserve[]: 0 0 0 0
[ 185.775142] DMA: 1*4kB 1*8kB 1*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3516kB
[ 185.777152] Normal: 1*4kB 0*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3444kB
[ 185.779420] HighMem: 151*4kB 14*8kB 6*16kB 2*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 876kB
[ 185.781487] 170219 total pagecache pages
[ 185.783662] 1273 pages in swap cache
[ 185.785764] Swap cache stats: add 295103, delete 293899, find 177724/191474
[ 185.787782] Free swap = 8072684kB
[ 185.789940] Total swap = 8385376kB
[ 185.802225] 783968 pages RAM
[ 185.804258] 556658 pages HighMem
[ 185.806241] 7853 pages reserved
[ 185.808263] 14784 pages shared
[ 185.810237] 764178 pages non-shared
[ 185.812216] iwl3945 0000:05:00.0: Failed to allocate SKB buffer with GFP_KERNEL. Only 5 free buffers remaining.
[ 185.871861] iwl3945: page allocation failure. order:0, mode:0xd0
[ 185.873847] Pid: 1225, comm: iwl3945 Not tainted 2.6.35.4-test-mm5v2-vmscan+snapshot-dirty #7
[ 185.876345] Call Trace:
[ 185.878416] [<c019aa67>] ? __alloc_pages_nodemask+0x577/0x630
[ 185.880493] [<f8a562c5>] ? iwl3945_rx_allocate+0x75/0x240 [iwl3945]
[ 185.882558] [<f8a56d50>] ? iwl3945_rx_replenish+0x20/0x50 [iwl3945]
[ 185.884651] [<f8a56dbc>] ? iwl3945_bg_rx_replenish+0x3c/0x50 [iwl3945]
[ 185.886753] [<c014b167>] ? worker_thread+0x117/0x1f0
[ 185.888831] [<f8a56d80>] ? iwl3945_bg_rx_replenish+0x0/0x50 [iwl3945]
[ 185.890856] [<c014ebd0>] ? autoremove_wake_function+0x0/0x40
[ 185.892984] [<c014b050>] ? worker_thread+0x0/0x1f0
[ 185.895116] [<c014e854>] ? kthread+0x74/0x80
[ 185.897249] [<c014e7e0>] ? kthread+0x0/0x80
[ 185.899367] [<c0103cb6>] ? kernel_thread_helper+0x6/0x10
[ 185.901465] Mem-Info:
[ 185.903580] DMA per-cpu:
[ 185.905697] CPU 0: hi: 0, btch: 1 usd: 0
[ 185.907801] CPU 1: hi: 0, btch: 1 usd: 0
[ 185.909915] Normal per-cpu:
[ 185.912014] CPU 0: hi: 186, btch: 31 usd: 184
[ 185.914144] CPU 1: hi: 186, btch: 31 usd: 71
[ 185.916228] HighMem per-cpu:
[ 185.918285] CPU 0: hi: 186, btch: 31 usd: 164
[ 185.920370] CPU 1: hi: 186, btch: 31 usd: 156
[ 185.922390] active_anon:134202 inactive_anon:33609 isolated_anon:0
[ 185.922391] active_file:689 inactive_file:344 isolated_file:0
[ 185.922393] unevictable:0 dirty:0 writeback:409 unstable:0
[ 185.922394] free:1897 slab_reclaimable:933 slab_unreclaimable:1678
[ 185.922395] mapped:952 shmem:165367 pagetables:304 bounce:0
[ 185.931250] DMA free:3516kB min:64kB low:80kB high:96kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15804kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:8kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 185.936496] lowmem_reserve[]: 0 865 3022 3022
[ 185.938184] Normal free:3568kB min:3728kB low:4660kB high:5592kB active_anon:0kB inactive_anon:0kB active_file:52kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:885944kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:0kB slab_reclaimable:3732kB slab_unreclaimable:6772kB kernel_stack:1480kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 185.943403] lowmem_reserve[]: 0 0 17259 17259
[ 185.945089] HighMem free:1000kB min:512kB low:2836kB high:5160kB active_anon:536552kB inactive_anon:134300kB active_file:2704kB inactive_file:1376kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2209236kB mlocked:0kB dirty:0kB writeback:1620kB mapped:3804kB shmem:660876kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:1216kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 185.950324] lowmem_reserve[]: 0 0 0 0
[ 185.952105] DMA: 1*4kB 1*8kB 1*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3516kB
[ 185.953979] Normal: 20*4kB 4*8kB 2*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3568kB
[ 185.955929] HighMem: 176*4kB 23*8kB 3*16kB 2*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1000kB
[ 185.957877] 167673 total pagecache pages
[ 185.959787] 1391 pages in swap cache
[ 185.961686] Swap cache stats: add 297661, delete 296270, find 177724/191474
[ 185.963640] Free swap = 8062924kB
[ 185.965591] Total swap = 8385376kB
[ 185.975363] 783968 pages RAM
[ 185.977245] 556658 pages HighMem
[ 185.979082] 7853 pages reserved
[ 185.980889] 14760 pages shared
[ 185.982676] 764093 pages non-shared
[ 185.984478] iwl3945 0000:05:00.0: Failed to allocate SKB buffer with GFP_KERNEL. Only 4 free buffers remaining.
...
...
[ 245.712056] usb usb3: __pm_runtime_suspend() from workqueue!
[ 245.712088] usb usb3: __pm_runtime_suspend() returns 0!
[ 245.712093] usb usb5: __pm_runtime_suspend() from workqueue!
[ 245.712114] usb usb5: __pm_runtime_suspend() returns 0!
[ 245.712119] usb usb1: __pm_runtime_suspend() from workqueue!
[ 245.712165] usb usb1: __pm_runtime_suspend() returns 0!
[ 265.583404] PM: Hibernation mode set to 'reboot'
[ 265.584286] PM: Marking nosave pages: 000000000009f000 - 0000000000100000
[ 265.584291] PM: Basic memory bitmaps created
[ 265.584292] PM: Syncing filesystems ... done.
[ 265.630328] Freezing user space processes ... (elapsed 0.01 seconds) done.
[ 265.644327] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[ 265.657301] PM: Preallocating image memory...
[ 277.545121] iwl3945: page allocation failure. order:0, mode:0xd0
[ 277.547985] Pid: 1144, comm: iwl3945 Not tainted 2.6.35.4-test-mm5v2-vmscan+snapshot-dirty #7
[ 277.547988] Call Trace:
[ 277.548001] [<c019aa67>] ? __alloc_pages_nodemask+0x577/0x630
[ 277.548015] [<f897d2c5>] ? iwl3945_rx_allocate+0x75/0x240 [iwl3945]
[ 277.548019] [<c03f0516>] ? schedule+0x356/0x730
[ 277.548024] [<f897dd50>] ? iwl3945_rx_replenish+0x20/0x50 [iwl3945]
[ 277.548029] [<f897ddbc>] ? iwl3945_bg_rx_replenish+0x3c/0x50 [iwl3945]
[ 277.548033] [<c014b167>] ? worker_thread+0x117/0x1f0
[ 277.548038] [<f897dd80>] ? iwl3945_bg_rx_replenish+0x0/0x50 [iwl3945]
[ 277.548042] [<c014ebd0>] ? autoremove_wake_function+0x0/0x40
[ 277.548045] [<c014b050>] ? worker_thread+0x0/0x1f0
[ 277.548048] [<c014e854>] ? kthread+0x74/0x80
[ 277.548050] [<c014e7e0>] ? kthread+0x0/0x80
[ 277.548054] [<c0103cb6>] ? kernel_thread_helper+0x6/0x10
[ 277.548056] Mem-Info:
[ 277.548059] DMA per-cpu:
[ 277.548061] CPU 0: hi: 0, btch: 1 usd: 0
[ 277.548063] CPU 1: hi: 0, btch: 1 usd: 0
[ 277.548065] Normal per-cpu:
[ 277.548067] CPU 0: hi: 186, btch: 31 usd: 158
[ 277.548069] CPU 1: hi: 186, btch: 31 usd: 81
[ 277.548070] HighMem per-cpu:
[ 277.548072] CPU 0: hi: 186, btch: 31 usd: 194
[ 277.548074] CPU 1: hi: 186, btch: 31 usd: 185
[ 277.548079] active_anon:132061 inactive_anon:33051 isolated_anon:0
[ 277.548080] active_file:890 inactive_file:320 isolated_file:0
[ 277.548081] unevictable:0 dirty:0 writeback:282 unstable:0
[ 277.548082] free:1884 slab_reclaimable:880 slab_unreclaimable:1633
[ 277.548084] mapped:991 shmem:164563 pagetables:306 bounce:0
[ 277.548090] DMA free:3520kB min:64kB low:80kB high:96kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15804kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:8kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 277.548094] lowmem_reserve[]: 0 865 3022 3022
[ 277.548102] Normal free:3608kB min:3728kB low:4660kB high:5592kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:76kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:885944kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:0kB slab_reclaimable:3520kB slab_unreclaimable:6524kB kernel_stack:1480kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:122 all_unreclaimable? no
[ 277.548106] lowmem_reserve[]: 0 0 17259 17259
[ 277.548114] HighMem free:408kB min:512kB low:2836kB high:5160kB active_anon:528244kB inactive_anon:132204kB active_file:3560kB inactive_file:1204kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2209236kB mlocked:0kB dirty:0kB writeback:1128kB mapped:3960kB shmem:658252kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:1224kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:4384 all_unreclaimable? no
[ 277.548118] lowmem_reserve[]: 0 0 0 0
[ 277.548121] DMA: 0*4kB 0*8kB 0*16kB 0*32kB 1*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3520kB
[ 277.548129] Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3608kB
[ 277.548136] HighMem: 100*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 408kB
[ 277.548143] 166232 total pagecache pages
[ 277.548145] 460 pages in swap cache
[ 277.548147] Swap cache stats: add 947081, delete 946621, find 437341/491917
[ 277.548148] Free swap = 2665828kB
[ 277.548150] Total swap = 2996084kB
[ 277.560847] 783968 pages RAM
[ 277.560849] 556658 pages HighMem
[ 277.560851] 7853 pages reserved
[ 277.560852] 14928 pages shared
[ 277.560854] 764721 pages non-shared
[ 277.560860] iwl3945 0000:05:00.0: Failed to allocate SKB buffer with GFP_KERNEL. Only 8 free buffers remaining.
[ 277.560897] iwl3945: page allocation failure. order:0, mode:0xd0
[ 277.560901] Pid: 1144, comm: iwl3945 Not tainted 2.6.35.4-test-mm5v2-vmscan+snapshot-dirty #7
[ 277.560903] Call Trace:
[ 277.560912] [<c019aa67>] ? __alloc_pages_nodemask+0x577/0x630
[ 277.560925] [<f897d2c5>] ? iwl3945_rx_allocate+0x75/0x240 [iwl3945]
[ 277.560930] [<c014b815>] ? __queue_work+0x25/0x40
[ 277.560933] [<c014b908>] ? queue_work_on+0x38/0x60
[ 277.560937] [<f897dd50>] ? iwl3945_rx_replenish+0x20/0x50 [iwl3945]
[ 277.560942] [<f897ddbc>] ? iwl3945_bg_rx_replenish+0x3c/0x50 [iwl3945]
[ 277.560945] [<c014b167>] ? worker_thread+0x117/0x1f0
[ 277.560949] [<f897dd80>] ? iwl3945_bg_rx_replenish+0x0/0x50 [iwl3945]
[ 277.560953] [<c014ebd0>] ? autoremove_wake_function+0x0/0x40
[ 277.560956] [<c014b050>] ? worker_thread+0x0/0x1f0
[ 277.560959] [<c014e854>] ? kthread+0x74/0x80
[ 277.560962] [<c014e7e0>] ? kthread+0x0/0x80
[ 277.560966] [<c0103cb6>] ? kernel_thread_helper+0x6/0x10
[ 277.560968] Mem-Info:
[ 277.560970] DMA per-cpu:
[ 277.560972] CPU 0: hi: 0, btch: 1 usd: 0
[ 277.560975] CPU 1: hi: 0, btch: 1 usd: 0
[ 277.560976] Normal per-cpu:
[ 277.560978] CPU 0: hi: 186, btch: 31 usd: 159
[ 277.560980] CPU 1: hi: 186, btch: 31 usd: 81
[ 277.560982] HighMem per-cpu:
[ 277.560984] CPU 0: hi: 186, btch: 31 usd: 194
[ 277.560986] CPU 1: hi: 186, btch: 31 usd: 185
[ 277.560991] active_anon:132061 inactive_anon:33051 isolated_anon:0
[ 277.560992] active_file:890 inactive_file:320 isolated_file:0
[ 277.560994] unevictable:0 dirty:0 writeback:168 unstable:0
[ 277.560995] free:1884 slab_reclaimable:880 slab_unreclaimable:1633
[ 277.560996] mapped:991 shmem:164563 pagetables:306 bounce:0
[ 277.561003] DMA free:3520kB min:64kB low:80kB high:96kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15804kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:8kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[ 277.561007] lowmem_reserve[]: 0 865 3022 3022
[ 277.561014] Normal free:3608kB min:3728kB low:4660kB high:5592kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:76kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:885944kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:0kB slab_reclaimable:3520kB slab_unreclaimable:6524kB kernel_stack:1480kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:122 all_unreclaimable? no
[ 277.561019] lowmem_reserve[]: 0 0 17259 17259
[ 277.561027] HighMem free:408kB min:512kB low:2836kB high:5160kB active_anon:528244kB inactive_anon:132204kB active_file:3560kB inactive_file:1204kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2209236kB mlocked:0kB dirty:0kB writeback:672kB mapped:3960kB shmem:658252kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:1224kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:4384 all_unreclaimable? no
[ 277.561031] lowmem_reserve[]: 0 0 0 0
[ 277.561034] DMA: 0*4kB 0*8kB 0*16kB 0*32kB 1*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3520kB
[ 277.561042] Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3608kB
[ 277.561049] HighMem: 100*4kB 1*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 408kB
[ 277.561057] 166232 total pagecache pages
[ 277.561059] 460 pages in swap cache
[ 277.561061] Swap cache stats: add 947081, delete 946621, find 437341/491917
[ 277.561063] Free swap = 2665828kB
[ 277.561065] Total swap = 2996084kB
[ 277.573331] 783968 pages RAM
[ 277.573333] 556658 pages HighMem
[ 277.573334] 7853 pages reserved
[ 277.573335] 14928 pages shared
[ 277.573336] 764720 pages non-shared
[ 277.573341] iwl3945 0000:05:00.0: Failed to allocate SKB buffer with GFP_KERNEL. Only 8 free buffers remaining.
=== >8 ===
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