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From:   Pankaj Suryawanshi <pankaj.suryawanshi@einfochips.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: Page-allocation-failure
Thread-Topic: Page-allocation-failure
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Date:   Fri, 29 Mar 2019 05:42:11 +0000
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________________________________________
From: Pankaj Suryawanshi
Sent: 28 March 2019 13:17
To: linux-kernel@vger.kernel.org; linux-mm@kvack.org
Subject: Re: Page-allocation-failure


________________________________________
From: Pankaj Suryawanshi
Sent: 28 March 2019 13:12
To: linux-kernel@vger.kernel.org; linux-mm@kvack.org
Subject: Page-allocation-failure

Hello ,

I am facing issue related to page allocation failure.

If anyone is familiar with this issue, let me know what is the issue?
How to solved/debug it.

Failure logs -:

---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
---
[   45.073877] kswapd0: page allocation failure: order:0, mode:0x1080020(GF=
P_ATOMIC), nodemask=3D(null)
[   45.073897] CPU: 1 PID: 716 Comm: kswapd0 Tainted: P           O    4.14=
.65 #3
[   45.073899] Hardware name: Android (Flattened Device Tree)
[   45.073901] Backtrace:
[   45.073915] [<8020dbec>] (dump_backtrace) from [<8020ded0>] (show_stack+=
0x18/0x1c)
[   45.073920]  r6:600f0093 r5:8141bd5c r4:00000000 r3:3abdc664
[   45.073928] [<8020deb8>] (show_stack) from [<80ba5e30>] (dump_stack+0x94=
/0xa8)
[   45.073936] [<80ba5d9c>] (dump_stack) from [<80350610>] (warn_alloc+0xe0=
/0x194)
[   45.073940]  r6:80e090cc r5:00000000 r4:81216588 r3:3abdc664
[   45.073946] [<80350534>] (warn_alloc) from [<803514e0>] (__alloc_pages_n=
odemask+0xd70/0x124c)
[   45.073949]  r3:00000000 r2:80e090cc
[   45.073952]  r6:00000001 r5:00000000 r4:8121696c
[   45.073959] [<80350770>] (__alloc_pages_nodemask) from [<803a6c20>] (all=
ocate_slab+0x364/0x3e4)
[   45.073964]  r10:00000080 r9:00000000 r8:01081220 r7:ffffffff r6:0000000=
0 r5:01080020
[   45.073966]  r4:bd00d180
[   45.073971] [<803a68bc>] (allocate_slab) from [<803a8c98>] (___slab_allo=
c.constprop.6+0x420/0x4b8)
[   45.073977]  r10:00000000 r9:00000000 r8:bd00d180 r7:01080020 r6:8121658=
8 r5:be586360
[   45.073978]  r4:00000000
[   45.073984] [<803a8878>] (___slab_alloc.constprop.6) from [<803a8d54>] (=
__slab_alloc.constprop.5+0x24/0x2c)
[   45.073989]  r10:0004e299 r9:bd00d180 r8:01080020 r7:8147b954 r6:bd6e5a6=
8 r5:00000000
[   45.073991]  r4:600f0093
[   45.073996] [<803a8d30>] (__slab_alloc.constprop.5) from [<803a9058>] (k=
mem_cache_alloc+0x16c/0x2d0)
[   45.073999]  r4:bd00d180 r3:be586360
---------------------------------------------------------------------------=
---------------------------------------------------------------------------=
-----


[   44.966861] Mem-Info:
[   44.966872] active_anon:106078 inactive_anon:142 isolated_anon:0
[   44.966872]  active_file:39117 inactive_file:34254 isolated_file:101
[   44.966872]  unevictable:597 dirty:157 writeback:0 unstable:0
[   44.966872]  slab_reclaimable:4967 slab_unreclaimable:9288
[   44.966872]  mapped:60971 shmem:185 pagetables:5905 bounce:0
[   44.966872]  free:2363 free_pcp:334 free_cma:0
[   44.966879] Node 0 active_anon:424312kB inactive_anon:568kB active_file:=
156468kB inactive_file:137016kB unevictable:2388kB isolated(anon):0kB isola=
ted(file):404kB mapped:243884kB dirty:628kB writeback:0kB shmem:740kB write=
back_tmp:0kB unstable:0kB all_unreclaimable? no
[   44.966889] DMA free:9348kB min:3772kB low:15684kB high:16624kB active_a=
non:420592kB inactive_anon:284kB active_file:155116kB inactive_file:135724k=
B unevictable:1592kB writepending:628kB present:928768kB managed:892508kB m=
locked:1592kB kernel_stack:9304kB pagetables:23440kB bounce:0kB free_pcp:13=
36kB local_pcp:672kB free_cma:0kB
[   44.966890] lowmem_reserve[]: 0 0 8 8
[   44.966903] HighMem free:104kB min:128kB low:236kB high:244kB active_ano=
n:2632kB inactive_anon:284kB active_file:1912kB inactive_file:1732kB unevic=
table:796kB writepending:0kB present:1056768kB managed:8192kB mlocked:796kB=
 kernel_stack:0kB pagetables:180kB bounce:0kB free_pcp:0kB local_pcp:0kB fr=
ee_cma:0kB
[   44.966904] lowmem_reserve[]: 0 0 0 0
[   44.966909] DMA: 148*4kB (UMH) 52*8kB (UMH) 30*16kB (UMH) 19*32kB (MH) 7=
*64kB (MH) 4*128kB (H) 5*256kB (H) 0*512kB 0*1024kB 1*2048kB (H) 1*4096kB (=
H) 0*8192kB 0*16384kB =3D 10480kB
[   44.966936] HighMem: 2*4kB (UM) 2*8kB (UM) 1*16kB (U) 0*32kB 1*64kB (U) =
0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB 0*16384kB =3D 1=
04kB
[   44.966958] 74134 total pagecache pages
[   44.966961] 0 pages in swap cache
[   44.966963] Swap cache stats: add 0, delete 0, find 0/0
[   44.966965] Free swap  =3D 0kB
[   44.966966] Total swap =3D 0kB
[   44.966967] 496384 pages RAM
[   44.966969] 264192 pages HighMem/MovableOnly
[   44.966972] 271209 pages reserved
[   44.966975] 262144 pages cma reserved

/proc/sys/vm/min_free_kbytes =3D 3774
Can increasing this value will solved this issue ?

Regards,
Pankaj
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