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Message-ID: <98318c510e39cf83beaa07a4dbf33f18209eb358.camel@infinera.com> Date: Tue, 23 Jan 2024 11:08:28 +0000 From: Joakim Tjernlund <Joakim.Tjernlund@...inera.com> To: "mhocko@...e.com" <mhocko@...e.com> CC: "david@...hat.com" <david@...hat.com>, "quic_pkondeti@...cinc.com" <quic_pkondeti@...cinc.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "hannes@...xchg.org" <hannes@...xchg.org>, "mgorman@...hsingularity.net" <mgorman@...hsingularity.net>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, "vbabka@...e.cz" <vbabka@...e.cz>, "quic_charante@...cinc.com" <quic_charante@...cinc.com>, "stable@...r.kernel.org" <stable@...r.kernel.org>, "quic_cgoldswo@...cinc.com" <quic_cgoldswo@...cinc.com> Subject: Re: [RESEND PATCH V2] mm: page_alloc: unreserve highatomic page blocks before oom On Tue, 2024-01-23 at 11:05 +0100, Michal Hocko wrote: > On Mon 22-01-24 23:14:59, Joakim Tjernlund wrote: > > On Mon, 2024-01-22 at 15:04 -0800, Greg KH wrote: > [...] > > > For mm patches like this, that are not explicitly tagged by the > > > maintainers to be included in the stable tree, we need their ack to be > > > able to apply them based on their requests. So can you get that for > > > this change and provide tested patches, we will be glad to queue them > > > up. > > > > I asked the author and he acknowledged it could be backported. Charan, please chim in. > > The patch itself is safe to backport but it would be great to here what > kind of problem you are trying to deal with. The issue fixed by this > patch is more on a corner case side than something that many users > should see. Could you share oom report you are seeing? Yes, here it is: Mar 9 12:52:39 xr kern.warn kernel: [ 1065.896824] xr-swm-install- invoked oom-killer: gfp_mask=0x1100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.907321] CPU: 0 PID: 2428 Comm: xr-swm-install- Not tainted 5.15.129-xr-linux #1 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.914974] Hardware name: infinera,xr (DT) Mar 9 12:52:40 xr kern.warn kernel: [ 1065.919158] Call trace: Mar 9 12:52:40 xr kern.warn kernel: [ 1065.921600] dump_backtrace+0x0/0x148 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.925310] show_stack+0x14/0x1c Mar 9 12:52:40 xr kern.warn kernel: [ 1065.928628] dump_stack_lvl+0x64/0x7c Mar 9 12:52:40 xr kern.warn kernel: [ 1065.932314] dump_stack+0x14/0x2c Mar 9 12:52:40 xr kern.warn kernel: [ 1065.935633] dump_header+0x64/0x1fc Mar 9 12:52:40 xr kern.warn kernel: [ 1065.939123] oom_kill_process+0xc0/0x28c Mar 9 12:52:40 xr kern.warn kernel: [ 1065.943063] out_of_memory+0x2c8/0x2e0 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.946811] __alloc_pages_slowpath.constprop.0+0x4f4/0x5b0 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.952388] __alloc_pages+0xcc/0xdc Mar 9 12:52:40 xr kern.warn kernel: [ 1065.955962] __page_cache_alloc+0x18/0x20 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.959993] pagecache_get_page+0x14c/0x1bc Mar 9 12:52:40 xr kern.warn kernel: [ 1065.964174] filemap_fault+0x1f4/0x390 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.967920] __do_fault+0x48/0x78 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.971253] __handle_mm_fault+0x35c/0x7c0 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.975351] handle_mm_fault+0x2c/0xc4 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.979101] do_page_fault+0x224/0x350 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.982857] do_translation_fault+0x3c/0x58 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.987038] do_mem_abort+0x40/0xa4 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.990526] el0_ia+0x74/0xc8 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.993498] el0t_32_sync_handler+0xa8/0xe8 Mar 9 12:52:40 xr kern.warn kernel: [ 1065.997679] el0t_32_sync+0x15c/0x160 Mar 9 12:52:40 xr kern.warn kernel: [ 1066.001379] Mem-Info: Mar 9 12:52:40 xr kern.warn kernel: [ 1066.003665] active_anon:18 inactive_anon:2435 isolated_anon:0 Mar 9 12:52:40 xr kern.warn kernel: [ 1066.003665] active_file:1 inactive_file:0 isolated_file:0 Mar 9 12:52:40 xr kern.warn kernel: [ 1066.003665] unevictable:267 dirty:0 writeback:0 Mar 9 12:52:40 xr kern.warn kernel: [ 1066.003665] slab_reclaimable:384 slab_unreclaimable:2223 Mar 9 12:52:40 xr kern.warn kernel: [ 1066.003665] mapped:1 shmem:0 pagetables:309 bounce:0 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.003665] kernel_misc_reclaimable:0 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.003665] free:1054 free_pcp:24 free_cma:0 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.037938] Node 0 active_anon:72kB inactive_anon:9740kB active_file:4kB inactive_file:0kB unevictable:1068kB isolated(anon):0kB isolated(file):0kB mapped:4kB dirty:0kB writeback:0kB shmem:0kB writeback_tmp:0kB kernel_stack:9 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.061723] Normal free:4216kB min:128kB low:160kB high:192kB reserved_highatomic:4096KB active_anon:72kB inactive_anon:9740kB active_file:4kB inactive_file:0kB unevictable:1068kB writepending:0kB present:36864kB managed:2944 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.087595] lowmem_reserve[]: 0 0 Mar 9 12:52:41 xr kern.warn kernel: [ 1066.090918] Normal: 206*4kB (MEH) 198*8kB (UMEH) 79*16kB (UMEH) 13*32kB (H) 2*64kB (H) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4216kB Mar 9 12:52:41 xr kern.warn kernel: [ 1066.104104] 269 total pagecache pages Mar 9 12:52:41 xr kern.warn kernel: [ 1066.107768] 9216 pages RAM Mar 9 12:52:41 xr kern.warn kernel: [ 1066.110469] 0 pages HighMem/MovableOnly Mar 9 12:52:41 xr kern.warn kernel: [ 1066.114305] 1855 pages reserved Mar 9 12:52:41 xr kern.info kernel: [ 1066.117448] Tasks state (memory values in pages): Mar 9 12:52:41 xr kern.info kernel: [ 1066.122150] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name Mar 9 12:52:41 xr kern.info kernel: [ 1066.130764] [ 77] 0 77 380 24 24576 0 0 mdev Mar 9 12:52:41 xr kern.info kernel: [ 1066.138857] [ 224] 0 224 364 9 24576 0 0 syslogd Mar 9 12:52:41 xr kern.info kernel: [ 1066.147208] [ 227] 0 227 364 9 28672 0 0 klogd Mar 9 12:52:41 xr kern.info kernel: [ 1066.155385] [ 242] 0 242 301 10 28672 0 0 dropbear Mar 9 12:52:41 xr kern.info kernel: [ 1066.163824] [ 248] 0 248 337 38 24576 0 0 dhcpcd Mar 9 12:52:41 xr kern.info kernel: [ 1066.172090] [ 259] 0 259 899 34 32768 0 0 watchdog Mar 9 12:52:41 xr kern.info kernel: [ 1066.180528] [ 261] 0 261 741 33 32768 0 0 rpmsg_broker Mar 9 12:52:41 xr kern.info kernel: [ 1066.189311] [ 263] 0 263 75466 965 622592 0 0 waactrl-main Mar 9 12:52:41 xr kern.info kernel: [ 1066.198095] [ 320] 0 320 1127 90 32768 0 0 xr-fm-agent Mar 9 12:52:41 xr kern.info kernel: [ 1066.206794] [ 324] 0 324 797 40 24576 0 0 factory_reset Mar 9 12:52:41 xr kern.info kernel: [ 1066.215668] [ 328] 0 328 1674 242 40960 0 0 xr-cm-agent Mar 9 12:52:41 xr kern.info kernel: [ 1066.224628] [ 331] 0 331 707 31 32768 0 0 mmcu-agent Mar 9 12:52:41 xr kern.info kernel: [ 1066.233245] [ 334] 0 334 4054 427 49152 0 0 xr-swm-agent Mar 9 12:52:41 xr kern.info kernel: [ 1066.242031] [ 338] 0 338 1129 94 32768 0 0 xr-pm-agent Mar 9 12:52:41 xr kern.info kernel: [ 1066.250729] [ 364] 0 364 734 34 32768 0 0 process_supervi Mar 9 12:52:41 xr kern.info kernel: [ 1066.259774] [ 399] 0 399 1327 215 32768 0 0 swupdate Mar 9 12:52:41 xr kern.info kernel: [ 1066.268212] [ 413] 0 413 370 13 28672 0 0 sh Mar 9 12:52:41 xr kern.info kernel: [ 1066.276131] [ 2072] 0 2072 306 13 28672 0 0 dropbear Mar 9 12:52:42 xr kern.info kernel: [ 1066.284569] [ 2081] 0 2081 366 11 24576 0 0 sh Mar 9 12:52:42 xr kern.info kernel: [ 1066.292492] [ 2427] 0 2427 876 93 28672 0 0 xr-swm-install- Mar 9 12:52:42 xr kern.info kernel: [ 1066.301536] [ 2468] 0 2468 546 25 28672 0 0 ip Mar 9 12:52:42 xr kern.info kernel: [ 1066.309453] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),task=waactrl-main,pid=263,uid=0 Mar 9 12:52:42 xr kern.err kernel: [ 1066.318197] Out of memory: Killed process 263 (waactrl-main) total-vm:301864kB, anon-rss:3860kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:608kB oom_score_adj:0
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