Kernel. 5.4.26 and Ceph Luminous Seem to be working still but I got this after putting load on it. [ 785.581198] kworker/3:2: page allocation failure: order:0, mode:0xa20(GFP_ATOMIC), nodemask=(null),cpuset=/,mems_allowed=0 [ 785.581211] CPU: 3 PID: 332 Comm: kworker/3:2 Not tainted 5.4.26 #4 [ 785.581212] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 785.581251] Workqueue: ceph-msgr ceph_con_workfn [libceph] [ 785.581252] Call Trace: [ 785.581255] <IRQ> [ 785.581271] dump_stack+0x6d/0x95 [ 785.581275] warn_alloc+0xfe/0x160 [ 785.581277] __alloc_pages_slowpath+0xe07/0xe40 [ 785.581282] ? dev_gro_receive+0x626/0x690 [ 785.581284] __alloc_pages_nodemask+0x2cd/0x320 [ 785.581287] alloc_pages_current+0x6a/0xe0 [ 785.581298] skb_page_frag_refill+0xd4/0x100 [ 785.581302] try_fill_recv+0x3ed/0x740 [virtio_net] [ 785.581304] virtnet_poll+0x31f/0x349 [virtio_net] [ 785.581306] net_rx_action+0x140/0x3c0 [ 785.581313] __do_softirq+0xe4/0x2da [ 785.581318] irq_exit+0xae/0xb0 [ 785.581320] do_IRQ+0x59/0xe0 [ 785.581322] common_interrupt+0xf/0xf [ 785.581322] </IRQ> [ 785.581332] RIP: 0010:tcp_rcv_space_adjust+0x56/0x1c0 [ 785.581333] Code: 06 00 00 bf 00 00 00 00 89 d1 48 89 f0 c1 e9 03 48 2b 83 50 08 00 00 48 0f 48 c7 39 c1 77 04 85 d2 75 4a 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 65 8b 05 ff 40 09 5b 89 c0 48 0f a3 05 05 2f ec 00 73 [ 785.581334] RSP: 0018:ffffa47c40267bf0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffdd [ 785.581335] RAX: 0000000000000002 RBX: 0000000000005437 RCX: 00000000000004fd [ 785.581336] RDX: 00000000000027eb RSI: 000000002ed30b4b RDI: 0000000000000000 [ 785.581336] RBP: ffffa47c40267bf8 R08: 0000011c5ab9d567 R09: 0000000000000001 [ 785.581337] R10: ffffa47c40267d38 R11: 0000000000000000 R12: ffff94854d06d400 [ 785.581338] R13: ffff948711b64600 R14: ffff948711b64b74 R15: 0000000000000000 [ 785.581340] tcp_recvmsg+0x297/0xb70 [ 785.581344] ? _cond_resched+0x19/0x40 [ 785.581347] ? aa_sk_perm+0x43/0x190 [ 785.581351] inet_recvmsg+0x5e/0xe0 [ 785.581353] sock_recvmsg+0x66/0x70 [ 785.581357] ceph_tcp_recvpage+0x76/0xa0 [libceph] [ 785.581363] ceph_con_workfn+0x1a33/0x2be0 [libceph] [ 785.581365] process_one_work+0x20f/0x400 [ 785.581366] worker_thread+0x34/0x410 [ 785.581369] kthread+0x121/0x140 [ 785.581370] ? process_one_work+0x400/0x400 [ 785.581371] ? kthread_park+0x90/0x90 [ 785.581372] ret_from_fork+0x35/0x40 [ 785.581374] Mem-Info: [ 785.581379] active_anon:5599 inactive_anon:7153 isolated_anon:0 [ 785.581382] Node 0 active_anon:22396kB inactive_anon:28612kB active_file:31252kB inactive_file:7673984kB unevictable:0kB isolated(anon):0kB isolated(file):64kB mapped:28112kB dirty:0kB writeback:0kB shmem:2384kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no [ 785.581383] Node 0 DMA free:15908kB min:132kB low:164kB high:196kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB [ 785.581386] lowmem_reserve[]: 0 3444 7878 7878 7878 [ 785.581387] Node 0 DMA32 free:31476kB min:37680kB low:45052kB high:52424kB active_anon:792kB inactive_anon:1216kB active_file:2316kB inactive_file:3427096kB unevictable:0kB writepending:0kB present:3653608kB managed:3588072kB mlocked:0kB kernel_stack:80kB pagetables:36kB bounce:0kB free_pcp:808kB local_pcp:696kB free_cma:0kB [ 785.581390] lowmem_reserve[]: 0 0 4433 4433 4433 [ 785.581391] Node 0 Normal free:20672kB min:56392kB low:65880kB high:75368kB active_anon:21604kB inactive_anon:27396kB active_file:28936kB inactive_file:4246864kB unevictable:0kB writepending:0kB present:4718592kB managed:4548188kB mlocked:0kB kernel_stack:3280kB pagetables:4208kB bounce:0kB free_pcp:1168kB local_pcp:1168kB free_cma:0kB [ 785.581393] lowmem_reserve[]: 0 0 0 0 0 [ 785.581395] Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB [ 785.581399] Node 0 DMA32: 35*4kB (UMEH) 109*8kB (UMEH) 372*16kB (UMEH) 144*32kB (MEH) 28*64kB (MEH) 37*128kB (ME) 55*256kB (UME) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 32180kB [ 785.581404] Node 0 Normal: 347*4kB (UMEH) 250*8kB (UMEH) 655*16kB (UMEH) 80*32kB (UMEH) 29*64kB (ME) 7*128kB (MEH) 6*256kB (MEH) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 20716kB [ 785.581409] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB [ 785.581409] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB [ 785.581410] 1926939 total pagecache pages [ 785.581413] 38 pages in swap cache [ 785.581413] Swap cache stats: add 994, delete 956, find 81/89 [ 785.581414] Free swap = 4033776kB [ 785.581414] Total swap = 4038652kB [ 785.581415] 2097048 pages RAM [ 785.581415] 0 pages HighMem/MovableOnly [ 785.581416] 59006 pages reserved [ 785.581416] 0 pages cma reserved [ 785.581417] 0 pages hwpoisoned