https://bugzilla.kernel.org/show_bug.cgi?id=73831
--- Comment #6 from Sunil <skmuttlu@xxxxxxxxx> ---
Hi,
Let me start with little bit background, however just a brief. Intermittently,
however more frequently some of the random write test cases with block size
split were failing due to fio hung issue. I have been observing this since last
few days, but couldnât repro it frequently. FIO hung issue was bit annoying to
me where test would fail due to fio hung state.
why fio was hung (in deadlock state)? FIO would look for contiguous memory
allocation, however I donât have logs anywhere to say that what size of pages
have been requested. This could be the potential reason being extreme memory
fragmentation and/or XFS memory pressure issue led FIO into deadlock state.
Some specific test cases (FIO workloads) Âinduces extremely fragmented
filesystem by involving tailored FIO workloads, and read/write on the same
would induce high memory pressure as well. One of these reason might have cause
memory extreme fragmentation and failed SLAB memory allocation. Â
My tests would run the test with defined runtime (runtime=1200) and kill the if
jobs exceeding 1200s runtime. I have been observing frequently since couple
of months on xfs filesystem, where FIO was not honoring Âdefined runtime bâcss
of hung/deadlock state, and/or sometime killing (pkill -9) dishonored FIO
procs in this state resulting defunct process (/corrupted state).
Here is the substantial proof for the same, where memory allocation was hung...
<snip>
[Mon Oct 10 21:08:53 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:54 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:55 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:55 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:55 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:56 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
[Mon Oct 10 21:08:56 2016] XFS: possible memory allocation deadlock in
kmem_alloc (mode:0x250)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
ATF sends âpkill -9â to dishonored FIO procs, in this case deadlock procs which
led proc into defunct stateâ
<snip>
r3a4-28:~ # ps -aef | grep 9163ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
rootÂÂÂÂÂ 9163ÂÂÂÂ 1Â 0 15:57 ?ÂÂÂÂÂÂÂ 00:00:05 /usr/local/staf/bin/STAFProcÂÂÂÂ
rootÂÂÂÂ 18111Â 9163 47 20:48 ?ÂÂÂÂÂÂÂ 00:21:17 [fio] <defunct>ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
rootÂÂÂÂ 18125Â 9163 47 20:48 ?ÂÂÂÂÂÂÂ 00:21:12 [fio] <defunct>ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
rootÂÂÂÂ 18171Â 9163 47 20:48 ?ÂÂÂÂÂÂÂ 00:21:15 [fio] <defunct>ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
rootÂÂÂÂ 18186Â 9163 47 20:48 ?ÂÂÂÂÂÂÂ 00:21:11 [fio] <defunct>ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
FIO process traces.
<snip>
2016-10-10T20:14:39.134180-07:00 r3a4-28 kernel: [15561.432108] fio: page
allocation failure: order:1, mode:0x200020ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.134202-07:00 r3a4-28 kernel: [15561.432114] CPU: 2 PID:
16735 Comm: fio Tainted: GÂÂÂÂÂÂÂÂÂÂÂÂÂ X 3.12.28-4-default #1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.134203-07:00 r3a4-28 kernel: [15561.432115] Hardware name:
Supermicro X9SRW-F/X9SRW-F, BIOS 3.2 01/15/2015ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.134203-07:00 r3a4-28 kernel: [15561.432117]Â
ffff88047fc438c0 ffffffff8150b1db 0000000000200020 ffffffff8113af90ÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.134204-07:00 r3a4-28 kernel: [15561.432121]Â
ffffffff8107793e 0000000000000000 ffff88047ff99b00 000000027ff98000ÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.134205-07:00 r3a4-28 kernel: [15561.432123]Â
ffff88047ffbdf68 0000000000000046 0000000000000000 0000000000000000ÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164051-07:00 r3a4-28 kernel: [15561.432126] Call Trace:ÂÂÂÂÂ
2016-10-10T20:14:39.164066-07:00 r3a4-28 kernel: [15561.432139]Â
[<ffffffff8100467d>] dump_trace+0x7d/0x2d0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164068-07:00 r3a4-28 kernel: [15561.432143]Â
[<ffffffff81004964>] show_stack_log_lvl+0x94/0x170ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164069-07:00 r3a4-28 kernel: [15561.432147]Â
[<ffffffff81005d91>] show_stack+0x21/0x50ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164070-07:00 r3a4-28 kernel: [15561.432152]Â
[<ffffffff8150b1db>] dump_stack+0x41/0x51ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164071-07:00 r3a4-28 kernel: [15561.432158]Â
[<ffffffff8113af90>] warn_alloc_failed+0xf0/0x160ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164072-07:00 r3a4-28 kernel: [15561.432163]Â
[<ffffffff8150763a>] __alloc_pages_slowpath+0x72f/0x796ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164197-07:00 r3a4-28 kernel: [15561.432166]Â
[<ffffffff8113ee7a>] __alloc_pages_nodemask+0x1ea/0x210ÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164202-07:00 r3a4-28 kernel: [15561.432172]Â
[<ffffffff81183f48>] kmem_getpages+0x58/0x1a0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164203-07:00 r3a4-28 kernel: [15561.432176]Â
[<ffffffff811859df>] fallback_alloc+0x20f/0x250ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164204-07:00 r3a4-28 kernel: [15561.432180]Â
[<ffffffff8118641c>] kmem_cache_alloc+0x11c/0x440ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164205-07:00 r3a4-28 kernel: [15561.432185]Â
[<ffffffff814120f4>] sk_prot_alloc+0x34/0x180ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164206-07:00 r3a4-28 kernel: [15561.432189]Â
[<ffffffff814126db>] sk_clone_lock+0x1b/0x2e0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164207-07:00 r3a4-28 kernel: [15561.432194]Â
[<ffffffff81465561>] inet_csk_clone_lock+0x11/0x140ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164344-07:00 r3a4-28 kernel: [15561.432199]Â
[<ffffffff8147d45e>] tcp_create_openreq_child+0x1e/0x430ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164348-07:00 r3a4-28 kernel: [15561.432202]Â
[<ffffffff81479708>] tcp_v4_syn_recv_sock+0x38/0x250ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164350-07:00 r3a4-28 kernel: [15561.432206]Â
[<ffffffff8147e0c9>] tcp_check_req+0x3b9/0x530ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164351-07:00 r3a4-28 kernel: [15561.432212]Â
[<ffffffff8147b21c>] tcp_v4_do_rcv+0x1dc/0x300ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164352-07:00 r3a4-28 kernel: [15561.432217]Â
[<ffffffff8147d3ef>] tcp_v4_rcv+0x75f/0x780ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164353-07:00 r3a4-28 kernel: [15561.432221]Â
[<ffffffff8145a05e>] ip_local_deliver_finish+0x9e/0x200ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164356-07:00 r3a4-28 kernel: [15561.432226]Â
[<ffffffff81425d07>] __netif_receive_skb_core+0x627/0x800ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164357-07:00 r3a4-28 kernel: [15561.432230]Â
[<ffffffff81425f5f>] netif_receive_skb+0x1f/0x90ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164358-07:00 r3a4-28 kernel: [15561.432234]Â
[<ffffffff814268e8>] napi_gro_receive+0x68/0x90ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164359-07:00 r3a4-28 kernel: [15561.432244]Â
[<ffffffffa049e4be>] igb_clean_rx_irq+0x3be/0x8a0 [igb]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164361-07:00 r3a4-28 kernel: [15561.432261]Â
[<ffffffffa049ec82>] igb_poll+0x2e2/0x760 [igb]ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164361-07:00 r3a4-28 kernel: [15561.432270]Â
[<ffffffff814262a0>] net_rx_action+0x140/0x240ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164362-07:00 r3a4-28 kernel: [15561.432275]Â
[<ffffffff8105a215>] __do_softirq+0xe5/0x230ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164495-07:00 r3a4-28 kernel: [15561.432280]Â
[<ffffffff8151ac9c>] call_softirq+0x1c/0x30ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164500-07:00 r3a4-28 kernel: [15561.432283]Â
[<ffffffff810045c5>] do_softirq+0x55/0x90ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164501-07:00 r3a4-28 kernel: [15561.432286]Â
[<ffffffff8105a4b5>] irq_exit+0x95/0xa0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164502-07:00 r3a4-28 kernel: [15561.432290]Â
[<ffffffff8151b47e>] do_IRQ+0x4e/0xb0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164503-07:00 r3a4-28 kernel: [15561.432295]Â
[<ffffffff8151162d>] common_interrupt+0x6d/0x6dÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164504-07:00 r3a4-28 kernel: [15561.432308]Â
[<0000000000431b38>] 0x431b37ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164505-07:00 r3a4-28 kernel: [15561.432309] SLAB: Unable to
allocate memory on node 0 (gfp=0x20)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164509-07:00 r3a4-28 kernel: [15561.432310]ÂÂ cache: TCP,
object size: 1728, order: 1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164510-07:00 r3a4-28 kernel: [15561.432313]ÂÂ node 0:
slabs: 5/5, objs: 20/20, free: 0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164511-07:00 r3a4-28 kernel: [15561.432624] fio: page
allocation failure: order:1, mode:0x200020ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164512-07:00 r3a4-28 kernel: [15561.432626] CPU: 2 PID:
16735 Comm: fio Tainted: GÂÂÂÂÂÂÂÂÂÂÂÂÂ X 3.12.28-4-default #1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164513-07:00 r3a4-28 kernel: [15561.432627] Hardware name:
Supermicro X9SRW-F/X9SRW-F, BIOS 3.2 01/15/2015ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164514-07:00 r3a4-28 kernel: [15561.432628]Â
ffff88047fc438c0 ffffffff8150b1db 0000000000200020 ffffffff8113af90ÂÂ
2016-10-10T20:14:39.164505-07:00 r3a4-28 kernel: [15561.432309] SLAB: Unable to
allocate memory on node 0 (gfp=0x20)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164509-07:00 r3a4-28 kernel: [15561.432310]ÂÂ cache: TCP,
object size: 1728, order: 1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164510-07:00 r3a4-28 kernel: [15561.432313]ÂÂ node 0:
slabs: 5/5, objs: 20/20, free: 0ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164511-07:00 r3a4-28 kernel: [15561.432624] fio: page
allocation failure: order:1, mode:0x200020ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164512-07:00 r3a4-28 kernel: [15561.432626] CPU: 2 PID:
16735 Comm: fio Tainted: GÂÂÂÂÂÂÂÂÂÂÂÂÂ X 3.12.28-4-default #1ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164513-07:00 r3a4-28 kernel: [15561.432627] Hardware name:
Supermicro X9SRW-F/X9SRW-F, BIOS 3.2 01/15/2015ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164514-07:00 r3a4-28 kernel: [15561.432628]Â
ffff88047fc438c0 ffffffff8150b1db 0000000000200020 ffffffff8113af90ÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164669-07:00 r3a4-28 kernel: [15561.432631]Â
0000000000000000 0000000000000000 ffff88047ff99b00 0000000200000000ÂÂÂÂÂÂÂÂÂÂÂÂÂ
2016-10-10T20:14:39.164673-07:00 r3a4-28 kernel: [15561.432633]Â
0000000000000002 0000000000000000 00ff880400000000 0000000000000000ÂÂÂÂÂ
I was thinking that following procedure would resolve the issue, however it
did not help to prevent the issue:
ÂÂÂ I observed this with more than 60% free memory as well(+ buffer/cache)
1. Clearing aches: Drop the caches "echo 3 > /proc/sys/vm/drop_caches" Âor
âecho 1 > /proc/sys/vm/drop_cachesâ, executing this for every 2 minutes
2. âecho 1 > /proc/sys/vm/compact_memory", (with CONFIG_COMPACTION=y)
 3. Reduce huge page size to 128K
Aforementioned procedure did not help to mitigate/prevent the issue
ÂHere is <snip>
Before reboot (even after compact)
r3a4-28:~ #Â cat /proc/buddyinfoÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ ÂÂÂÂÂÂÂÂÂÂÂ
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂâÂÂ
Node 0, zoneÂÂÂÂÂ DMAÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂÂÂÂ 0ÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂÂÂÂ 1ÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂ
ÂÂ 1ÂÂÂÂÂ 1ÂÂÂÂÂ 3ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
 ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂâÂÂ
Node 0, zoneÂÂÂ DMA32Â 26713Â 23984Â 16125ÂÂ 7850ÂÂ 2725ÂÂÂ 916ÂÂÂ 526ÂÂÂ 244ÂÂ
 93 78 4ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
 âÂÂ
Node 0, zoneÂÂ Normal 326417 256905 167300Â 76595Â 21201ÂÂ 4638ÂÂ 1814ÂÂÂ 778ÂÂ
207ÂÂÂ 371ÂÂÂÂÂ 3ÂÂÂÂÂÂÂÂÂ
after reboot:
r3a4-28:~ # cat /proc/buddyinfoÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂâÂÂ
Node 0, zoneÂÂÂÂÂ DMAÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂÂÂÂ 0ÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂÂÂÂ 1ÂÂÂÂÂ 1ÂÂÂÂÂ 0ÂÂ
ÂÂ 1ÂÂÂÂÂ 1ÂÂÂÂÂ 3ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
 âÂÂ
Node 0, zoneÂÂÂ DMA32ÂÂÂ 197ÂÂÂ 117ÂÂÂÂ 39ÂÂÂÂÂ 9ÂÂÂÂÂ 1ÂÂÂÂÂ 2ÂÂÂÂÂ 2ÂÂÂÂÂ 4ÂÂ
ÂÂ 2ÂÂÂÂÂ 2ÂÂÂ 426ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ
 âÂÂ
Node 0, zoneÂÂ NormalÂÂÂÂ 30ÂÂÂ 487ÂÂÂ 133ÂÂÂÂ 51ÂÂÂÂÂ 8ÂÂÂÂÂ 3 ÂÂÂÂ12ÂÂÂÂ 11ÂÂ
ÂÂ 6ÂÂÂÂÂ 4ÂÂ 3347
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