[LU-7333] nfs modprobe failure on sles11sp3

• Type: Bug
• Resolution: Not a Bug
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Bob Glossman (Inactive)

Description

derived from LU-7200

seeing failure like this on every boot of MDS:

02:33:55:[    1.798369] modprobe: page allocation failure: order:4, mode:0xd0
02:33:55:[    1.799381] Pid: 409, comm: modprobe Tainted: G           E   3.0.101-0.47.67_lustre.g71918e8-default #1
02:33:55:[    1.801128] Call Trace:
02:33:55:[    1.801750]  [<ffffffff81004b95>] dump_trace+0x75/0x300
02:33:55:[    1.802653]  [<ffffffff81465033>] dump_stack+0x69/0x6f
02:33:55:[    1.803551]  [<ffffffff811028d6>] warn_alloc_failed+0xc6/0x170
02:33:55:[    1.804574]  [<ffffffff811044e1>] __alloc_pages_slowpath+0x561/0x7f0
02:33:55:[    1.805603]  [<ffffffff81104959>] __alloc_pages_nodemask+0x1e9/0x200
02:33:55:[    1.806622]  [<ffffffff81146e43>] kmem_getpages+0x53/0x180
02:33:55:[    1.807563]  [<ffffffff81147c56>] fallback_alloc+0x196/0x270
02:33:55:[    1.808524]  [<ffffffff81148847>] kmem_cache_alloc+0x207/0x2a0
02:33:55:[    1.809491]  [<ffffffff8114acb7>] kmem_cache_create+0x297/0x540
02:33:55:[    1.810472]  [<ffffffffa033a316>] nfs_init_writepagecache+0x1f/0xd09 [nfs]
02:33:55:[    1.811563]  [<ffffffffa033a185>] init_nfs_fs+0xe5/0x138 [nfs]
02:33:55:[    1.812545]  [<ffffffff810001cb>] do_one_initcall+0x3b/0x180
02:33:55:[    1.813496]  [<ffffffff810a2e2f>] sys_init_module+0xcf/0x240
02:33:55:[    1.814458]  [<ffffffff8146fe72>] system_call_fastpath+0x16/0x1b
02:33:55:[    1.815442]  [<00007f17535abd5a>] 0x7f17535abd59
02:33:55:[    1.816299] Mem-Info:
02:33:55:[    1.816916] Node 0 DMA per-cpu:
02:33:55:[    1.817655] CPU    0: hi:    0, btch:   1 usd:   0
02:33:55:[    1.818518] Node 0 DMA32 per-cpu:
02:33:55:[    1.819303] CPU    0: hi:   42, btch:   7 usd:   0
02:33:55:[    1.820178] active_anon:1395 inactive_anon:6 isolated_anon:0
02:33:55:[    1.820179]  active_file:3865 inactive_file:3893 isolated_file:0
02:33:55:[    1.820179]  unevictable:9609 dirty:0 writeback:0 unstable:0
02:33:55:[    1.820180]  free:893 slab_reclaimable:893 slab_unreclaimable:4198
02:33:55:[    1.820181]  mapped:1160 shmem:8 pagetables:356 bounce:0
02:34:16:[    1.824950] Node 0 DMA free:460kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:72kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:308kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
02:34:16:[    1.830684] lowmem_reserve[]: 0 115 115 115
02:34:17:[    1.831764] Node 0 DMA32 free:3112kB min:1372kB low:1712kB high:2056kB active_anon:5580kB inactive_anon:24kB active_file:15388kB inactive_file:15572kB unevictable:38436kB isolated(anon):0kB isolated(file):0kB present:118392kB mlocked:8208kB dirty:0kB writeback:0kB mapped:4640kB shmem:32kB slab_reclaimable:3572kB slab_unreclaimable:16792kB kernel_stack:568kB pagetables:1424kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
02:34:17:[    1.837891] lowmem_reserve[]: 0 0 0 0
02:34:17:[    1.838916] Node 0 DMA: 3*4kB 0*8kB 0*16kB 0*32kB 3*64kB 2*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 460kB
02:34:17:[    1.841450] Node 0 DMA32: 142*4kB 126*8kB 54*16kB 17*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 3112kB
02:34:17:[    1.844017] 15327 total pagecache pages
02:34:17:[    1.844773] 0 pages in swap cache
02:34:17:[    1.845496] Swap cache stats: add 0, delete 0, find 0/0
02:34:17:[    1.846396] Free swap  = 0kB
02:34:17:[    1.847064] Total swap = 0kB
02:34:17:[    1.847719] 29675 pages RAM
02:34:17:[    1.848471] FS-Cache: Netfs 'nfs' unregistered from caching
02:34:17:modprobe: FATAL: Error inserting nfs (/lib/modules/3.0.101-0.47.67_lustre.g71918e8-default/kernel/fs/nfs/nfs.ko): Cannot allocate memory

It doesn't appear fatal. Execution proceeds after these events. Sure to block use of nfs. I believe it's common in many sites and test environments to mount nfs volumes to all servers for common logging or sharing low data rate info.

Issue Links

• is related to: LU-7200 kernel update [SLES11 SP3 3.0.101-0.47.67]