ISCSI Issues

[Les62]

I keep getting ISCSI Kernel Dumps for one of my LUNs. Other 2 LUNs are fine. Suggested fix is to adjust vm.min_free_kbytes=65536 but this doesn't exist on my NAS. Anyone else experienced this?

Thanks...

Oct 12 02:18:25 nas kernel: [269538.291040] iscsi_trx: page allocation failure: order:4, mode:0x24040c0
Oct 12 02:18:25 nas kernel: [269538.291052] CPU: 1 PID: 6250 Comm: iscsi_trx Tainted: P O 4.4.190.x86_64.1 #1
Oct 12 02:18:25 nas kernel: [269538.291056] Hardware name: NETGEAR ReadyNAS 314 /ReadyNAS 314 , BIOS 4.6.5 06/11/2013
Oct 12 02:18:25 nas kernel: [269538.291060] 0000000000000000 ffff8800652d7b08 ffffffff8836360d 00000000024040c0
Oct 12 02:18:25 nas kernel: [269538.291067] 0000000000000001 ffff8800652d7b90 ffffffff880e2749 ffffffff88d800a0
Oct 12 02:18:25 nas kernel: [269538.291072] 00000004024040c0 0000000000000000 0000000000000004 0000000000000040
Oct 12 02:18:25 nas kernel: [269538.291078] Call Trace:
Oct 12 02:18:25 nas kernel: [269538.291089] [<ffffffff8836360d>] dump_stack+0x4d/0x63
Oct 12 02:18:25 nas kernel: [269538.291096] [<ffffffff880e2749>] warn_alloc_failed+0x10c/0x121
Oct 12 02:18:25 nas kernel: [269538.291101] [<ffffffff880e4d86>] __alloc_pages_nodemask+0x7f8/0x82f
Oct 12 02:18:25 nas kernel: [269538.291108] [<ffffffff88074689>] ? insert_work+0x88/0x93
Oct 12 02:18:25 nas kernel: [269538.291113] [<ffffffff880e4f8f>] alloc_kmem_pages+0x1d/0x83
Oct 12 02:18:25 nas kernel: [269538.291120] [<ffffffff880f6345>] kmalloc_order+0x13/0x3a
Oct 12 02:18:25 nas kernel: [269538.291126] [<ffffffff881112e3>] __kmalloc+0x2f/0x12b
Oct 12 02:18:25 nas kernel: [269538.291132] [<ffffffff885760db>] target_alloc_sgl+0x4a/0x127
Oct 12 02:18:25 nas kernel: [269538.291138] [<ffffffff885762f8>] transport_generic_new_cmd+0x140/0x1f4
Oct 12 02:18:25 nas kernel: [269538.291143] [<ffffffff88576405>] transport_handle_cdb_direct+0x59/0x6e
Oct 12 02:18:25 nas kernel: [269538.291149] [<ffffffff88585b6a>] iscsit_execute_cmd+0x163/0x232
Oct 12 02:18:25 nas kernel: [269538.291155] [<ffffffff8858d7c1>] iscsit_sequence_cmd+0xd3/0x14e
Oct 12 02:18:25 nas kernel: [269538.291162] [<ffffffff8858fc61>] iscsit_process_scsi_cmd+0x20/0xa5
Oct 12 02:18:25 nas kernel: [269538.291167] [<ffffffff8859286c>] iscsi_target_rx_thread+0x332/0xca1
Oct 12 02:18:25 nas kernel: [269538.291172] [<ffffffff8859253a>] ? iscsi_target_tx_thread+0x1c0/0x1c0
Oct 12 02:18:25 nas kernel: [269538.291178] [<ffffffff88079cbc>] kthread+0xdc/0xe4
Oct 12 02:18:25 nas kernel: [269538.291184] [<ffffffff88079be0>] ? kthread_worker_fn+0x129/0x129
Oct 12 02:18:25 nas kernel: [269538.291190] [<ffffffff888e682f>] ret_from_fork+0x3f/0x80
Oct 12 02:18:25 nas kernel: [269538.291196] [<ffffffff88079be0>] ? kthread_worker_fn+0x129/0x129
Oct 12 02:18:25 nas kernel: [269538.291332] Mem-Info:
Oct 12 02:18:25 nas kernel: [269538.291345] active_anon:6847 inactive_anon:8533 isolated_anon:0
Oct 12 02:18:25 nas kernel: [269538.291345] active_file:182091 inactive_file:200365 isolated_file:0
Oct 12 02:18:25 nas kernel: [269538.291345] unevictable:0 dirty:158 writeback:0 unstable:0
Oct 12 02:18:25 nas kernel: [269538.291345] slab_reclaimable:12802 slab_unreclaimable:19514
Oct 12 02:18:25 nas kernel: [269538.291345] mapped:6718 shmem:2415 pagetables:2970 bounce:0
Oct 12 02:18:25 nas kernel: [269538.291345] free:32466 free_pcp:0 free_cma:0
Oct 12 02:18:25 nas kernel: [269538.291410] DMA free:8508kB min:572kB low:712kB high:856kB active_anon:0kB inactive_anon:76kB active_file:460kB inactive_file:3052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15976kB managed:15888kB mlocked:0kB dirty:0kB writeback:0kB mapped:8kB shmem:4kB slab_reclaimable:220kB slab_unreclaimable:416kB kernel_stack:64kB pagetables:16kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 12 02:18:25 nas kernel: [269538.291434] lowmem_reserve[]: 0 1969 1969 1969
Oct 12 02:18:25 nas kernel: [269538.291467] DMA32 free:121356kB min:72844kB low:91052kB high:109264kB active_anon:27388kB inactive_anon:34056kB active_file:727904kB inactive_file:798408kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2068064kB managed:2016832kB mlocked:0kB dirty:632kB writeback:0kB mapped:26864kB shmem:9656kB slab_reclaimable:50988kB slab_unreclaimable:77640kB kernel_stack:3808kB pagetables:11864kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Oct 12 02:18:25 nas kernel: [269538.291501] lowmem_reserve[]: 0 0 0 0
Oct 12 02:18:25 nas kernel: [269538.291507] DMA: 11*4kB (UME) 30*8kB (UME) 26*16kB (UE) 19*32kB (UME) 15*64kB (UME) 6*128kB (UME) 3*256kB (UE) 5*512kB (UE) 2*1024kB (E) 0*2048kB 0*4096kB = 8412kB
Oct 12 02:18:25 nas kernel: [269538.291591] DMA32: 12111*4kB (UMEH) 8547*8kB (UMEH) 35*16kB (UMH) 17*32kB (UH) 10*64kB (H) 10*128kB (H) 4*256kB (H) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 121380kB
Oct 12 02:18:25 nas kernel: [269538.291612] 384893 total pagecache pages
Oct 12 02:18:25 nas kernel: [269538.291617] 0 pages in swap cache
Oct 12 02:18:25 nas kernel: [269538.291621] Swap cache stats: add 0, delete 0, find 0/0
Oct 12 02:18:25 nas kernel: [269538.291623] Free swap = 1046524kB
Oct 12 02:18:25 nas kernel: [269538.291626] Total swap = 1046524kB
Oct 12 02:18:25 nas kernel: [269538.291628] 521010 pages RAM
Oct 12 02:18:25 nas kernel: [269538.291631] 0 pages HighMem/MovableOnly
Oct 12 02:18:25 nas kernel: [269538.291633] 12830 pages reserved