________________________________________ From: Pankaj Suryawanshi Sent: 28 March 2019 13:17 To: linux-kernel@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx Subject: Re: Page-allocation-failure ________________________________________ From: Pankaj Suryawanshi Sent: 28 March 2019 13:12 To: linux-kernel@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx 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(GFP_ATOMIC), nodemask=(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_nodemask+0xd70/0x124c) [ 45.073949] r3:00000000 r2:80e090cc [ 45.073952] r6:00000001 r5:00000000 r4:8121696c [ 45.073959] [<80350770>] (__alloc_pages_nodemask) from [<803a6c20>] (allocate_slab+0x364/0x3e4) [ 45.073964] r10:00000080 r9:00000000 r8:01081220 r7:ffffffff r6:00000000 r5:01080020 [ 45.073966] r4:bd00d180 [ 45.073971] [<803a68bc>] (allocate_slab) from [<803a8c98>] (___slab_alloc.constprop.6+0x420/0x4b8) [ 45.073977] r10:00000000 r9:00000000 r8:bd00d180 r7:01080020 r6:81216588 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:bd6e5a68 r5:00000000 [ 45.073991] r4:600f0093 [ 45.073996] [<803a8d30>] (__slab_alloc.constprop.5) from [<803a9058>] (kmem_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 isolated(file):404kB mapped:243884kB dirty:628kB writeback:0kB shmem:740kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no [ 44.966889] DMA free:9348kB min:3772kB low:15684kB high:16624kB active_anon:420592kB inactive_anon:284kB active_file:155116kB inactive_file:135724kB unevictable:1592kB writepending:628kB present:928768kB managed:892508kB mlocked:1592kB kernel_stack:9304kB pagetables:23440kB bounce:0kB free_pcp:1336kB 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_anon:2632kB inactive_anon:284kB active_file:1912kB inactive_file:1732kB unevictable:796kB writepending:0kB present:1056768kB managed:8192kB mlocked:796kB kernel_stack:0kB pagetables:180kB bounce:0kB free_pcp:0kB local_pcp:0kB free_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 = 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 = 104kB [ 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 = 0kB [ 44.966966] Total swap = 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 = 3774 Can increasing this value will solved this issue ? 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