5.7.0 page allocation failure: order:0, mode:0x400d0

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Hi,

I'm seeing a new problem with kernel 5.7.0 I haven't previously seen.
I am testing both swap on /dev/zram and swap on a partition. Two
swaps. The workload is compiling webkitgtk with defaults, which is
slightly overcommitted for the resources. I'm actually expecting oom.
But that's not what happens. After about 2 hours the whole thing just
splats.

Bug report here with dmesg and meminfo attached. Partial below.
https://bugzilla.kernel.org/show_bug.cgi?id=208085


MemTotal:        8052740 kB
SwapTotal:      14908572 kB
$ swapon
NAME       TYPE       SIZE USED PRIO
/dev/sda5  partition 10.4G 4.4M   -2
/dev/zram0 partition  3.9G 241M    3
$

There are multiple splats, this is one of them.

[ 5225.501756] gnome-shell: page allocation failure: order:0,
mode:0x400d0(__GFP_IO|__GFP_FS|__GFP_COMP|__GFP_RECLAIMABLE),
nodemask=(null),cpuset=/,mems_allowed=0
[ 5225.501763] CPU: 2 PID: 1155 Comm: gnome-shell Not tainted
5.7.0-1.fc33.x86_64 #1
[ 5225.501764] Hardware name: Apple Inc.
MacBookPro8,2/Mac-94245A3940C91C80, BIOS
MBP81.88Z.0050.B00.1804101331 04/10/18
[ 5225.501765] Call Trace:
[ 5225.501774]  dump_stack+0x64/0x88
[ 5225.501777]  warn_alloc.cold+0x75/0xd9
[ 5225.501781]  __alloc_pages_slowpath.constprop.0+0xcfa/0xd30
[ 5225.501785]  ? alloc_slab_page+0x195/0x310
[ 5225.501786]  __alloc_pages_nodemask+0x2df/0x320
[ 5225.501787]  alloc_slab_page+0x195/0x310
[ 5225.501789]  allocate_slab+0x3c5/0x440
[ 5225.501791]  ___slab_alloc+0x40c/0x5f0
[ 5225.501793]  ? xas_nomem+0x28/0x70
[ 5225.501795]  ? xas_alloc+0x9b/0xc0
[ 5225.501797]  ? xas_nomem+0x28/0x70
[ 5225.501798]  __slab_alloc+0x1c/0x30
[ 5225.501800]  kmem_cache_alloc+0x20e/0x220
[ 5225.501802]  xas_nomem+0x28/0x70
[ 5225.501803]  add_to_swap_cache+0x321/0x400
[ 5225.501806]  __read_swap_cache_async+0x105/0x240
[ 5225.501808]  swap_cluster_readahead+0x22c/0x2e0
[ 5225.501811]  shmem_swapin+0x8e/0xc0
[ 5225.501812]  ? kmem_cache_free+0x174/0x190
[ 5225.501814]  ? xas_store+0x33a/0x5e0
[ 5225.501817]  shmem_swapin_page+0x196/0x740
[ 5225.501819]  shmem_getpage_gfp+0x3a2/0xa60
[ 5225.501822]  shmem_read_mapping_page_gfp+0x32/0x60
[ 5225.501868]  shmem_get_pages+0x155/0x5e0 [i915]
[ 5225.501874]  ? __queue_work+0x1e3/0x410
[ 5225.501897]  ? add_hole+0x115/0x170 [drm]
[ 5225.501927]  ? fence_notify+0x86/0x104 [i915]
[ 5225.501954]  ? __i915_sw_fence_complete+0x10f/0x1c0 [i915]
[ 5225.501987]  __i915_gem_object_get_pages+0x68/0xa0 [i915]
[ 5225.502022]  i915_vma_pin+0x3fe/0x6c0 [i915]
[ 5225.502056]  eb_add_vma+0x10b/0x2c0 [i915]
[ 5225.502089]  i915_gem_do_execbuffer+0x704/0x3430 [i915]
[ 5225.502094]  ? blk_account_io_start+0xda/0x140
[ 5225.502096]  ? bio_attempt_back_merge+0x83/0xe0
[ 5225.502098]  ? blk_attempt_plug_merge+0x10c/0x110
[ 5225.502102]  ? bfq_update_fin_time_enqueue+0x13d/0x1a0
[ 5225.502106]  ? idling_needed_for_service_guarantees+0x3f/0x70
[ 5225.502108]  ? bfq_better_to_idle+0x73/0x90
[ 5225.502110]  ? bfq_dispatch_request+0x6ce/0x1070
[ 5225.502113]  ? bfq_add_bfqq_busy+0xa1/0x162
[ 5225.502117]  ? __blk_mq_run_hw_queue+0x49/0x110
[ 5225.502121]  ? __alloc_pages_slowpath.constprop.0+0x15b/0xd30
[ 5225.502124]  ? generic_end_io_acct+0x91/0xf0
[ 5225.502127]  ? sched_clock+0x5/0x10
[ 5225.502131]  ? sched_clock_cpu+0xc/0xa0
[ 5225.502134]  ? _cond_resched+0x16/0x40
[ 5225.502136]  ? __kmalloc_node+0x204/0x300
[ 5225.502168]  ? i915_gem_execbuffer2_ioctl+0x93/0x3e0 [i915]
[ 5225.502201]  i915_gem_execbuffer2_ioctl+0x1ea/0x3e0 [i915]
[ 5225.502204]  ? reuse_swap_page+0x8c/0x380
[ 5225.502238]  ? i915_gem_execbuffer_ioctl+0x2a0/0x2a0 [i915]
[ 5225.502253]  drm_ioctl_kernel+0x86/0xd0 [drm]
[ 5225.502257]  ? avc_has_perm+0x3b/0x160
[ 5225.502272]  drm_ioctl+0x206/0x390 [drm]
[ 5225.502306]  ? i915_gem_execbuffer_ioctl+0x2a0/0x2a0 [i915]
[ 5225.502311]  ksys_ioctl+0x82/0xc0
[ 5225.502313]  __x64_sys_ioctl+0x16/0x20
[ 5225.502317]  do_syscall_64+0x5b/0xf0
[ 5225.502320]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 5225.502323] RIP: 0033:0x7ff76292047b
[ 5225.502326] Code: 0f 1e fa 48 8b 05 1d aa 0c 00 64 c7 00 26 00 00
00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00
00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ed a9 0c 00 f7 d8 64 89
01 48
[ 5225.502328] RSP: 002b:00007fff75aed128 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[ 5225.502330] RAX: ffffffffffffffda RBX: 00007fff75aed170 RCX: 00007ff76292047b
[ 5225.502332] RDX: 00007fff75aed170 RSI: 0000000040406469 RDI: 000000000000000d
[ 5225.502334] RBP: 0000000040406469 R08: 000000000000000d R09: 000055ff644b09a0
[ 5225.502335] R10: 0000000000000000 R11: 0000000000000246 R12: 000055ff6446c760
[ 5225.502336] R13: 000000000000000d R14: ffffffffffffffff R15: 00007ff74af22828
[ 5225.502339] Mem-Info:
[ 5225.502345] active_anon:1433763 inactive_anon:207289 isolated_anon:182
                active_file:10333 inactive_file:8393 isolated_file:2
                unevictable:4657 dirty:100 writeback:0 unstable:0
                slab_reclaimable:16672 slab_unreclaimable:38093
                mapped:8919 shmem:4496 pagetables:10454 bounce:0
                free:26161 free_pcp:2054 free_cma:0
[ 5225.502350] Node 0 active_anon:5735052kB inactive_anon:829156kB
active_file:41332kB inactive_file:33572kB unevictable:18628kB
isolated(anon):728kB isolated(file):8kB mapped:35676kB dirty:400kB
writeback:0kB shmem:17984kB shmem_thp: 0kB shmem_pmdmapped: 0kB
anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
[ 5225.502352] Node 0 DMA free:15344kB min:128kB low:160kB high:192kB
reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB
active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB
present:15988kB managed:15360kB mlocked:0kB kernel_stack:0kB
pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 5225.502357] lowmem_reserve[]: 0 2069 7810 7810 7810
[ 5225.502360] Node 0 DMA32 free:40212kB min:17868kB low:22332kB
high:26796kB reserved_highatomic:0KB active_anon:1640016kB
inactive_anon:265148kB active_file:9856kB inactive_file:12584kB
unevictable:2968kB writepending:136kB present:2255864kB
managed:2157904kB mlocked:0kB kernel_stack:48kB pagetables:8524kB
bounce:0kB free_pcp:2904kB local_pcp:156kB free_cma:0kB
[ 5225.502365] lowmem_reserve[]: 0 0 5741 5741 5741
[ 5225.502368] Node 0 Normal free:49088kB min:49584kB low:61980kB
high:74376kB reserved_highatomic:2048KB active_anon:4098076kB
inactive_anon:563004kB active_file:32212kB inactive_file:21312kB
unevictable:13680kB writepending:0kB present:6027264kB
managed:5879476kB mlocked:1792kB kernel_stack:7312kB
pagetables:33292kB bounce:0kB free_pcp:5388kB local_pcp:780kB
free_cma:0kB
[ 5225.502373] lowmem_reserve[]: 0 0 0 0 0
[ 5225.502376] Node 0 DMA: 0*4kB 0*8kB 1*16kB (U) 1*32kB (U) 1*64kB
(U) 1*128kB (U) 1*256kB (U) 1*512kB (U) 0*1024kB 1*2048kB (M) 3*4096kB
(M) = 15344kB
[ 5225.502385] Node 0 DMA32: 1160*4kB (UM) 471*8kB (UME) 84*16kB (UM)
103*32kB (UME) 116*64kB (UME) 59*128kB (UME) 26*256kB (UE) 8*512kB (E)
2*1024kB (E) 0*2048kB 0*4096kB = 40824kB
[ 5225.502394] Node 0 Normal: 4778*4kB (UMH) 1400*8kB (UMEH) 346*16kB
(UMH) 270*32kB (UMEH) 20*64kB (UMEH) 20*128kB (MEH) 4*256kB (MEH)
0*512kB 0*1024kB 0*2048kB 0*4096kB = 49352kB
[ 5225.502404] Node 0 hugepages_total=0 hugepages_free=0
hugepages_surp=0 hugepages_size=2048kB
[ 5225.502405] 114228 total pagecache pages
[ 5225.502408] 90616 pages in swap cache
[ 5225.502410] Swap cache stats: add 52638812, delete 52548141, find
2182667/30436788
[ 5225.502411] Free swap  = 5921200kB
[ 5225.502413] Total swap = 14908572kB
[ 5225.502414] 2074779 pages RAM
[ 5225.502415] 0 pages HighMem/MovableOnly
[ 5225.502416] 61594 pages reserved
[ 5225.502417] 0 pages cma reserved
[ 5225.502418] 0 pages hwpoisoned
[ 5225.502420] SLUB: Unable to allocate memory on node -1,
gfp=0xc0(__GFP_IO|__GFP_FS)
[ 5225.502422]   cache: radix_tree_node, object size: 576, buffer
size: 584, default order: 2, min order: 0
[ 5225.502424]   node 0: slabs: 654, objs: 11886, free: 0



-- 
Chris Murphy




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