Hi,
I got an error about this when I use lio target.
It also happen on 3.6.x series kernel. Wished someone may meet this.
But it seems no. And before, I used to enable ZCACHE feature in kernel,
Which is a staging feature in kernel.
But after I disabled ZCACHE feature in the kernel on 3.7.1, I still saw
this.
So, I think it's a bug.
The kernel dump is attached, Thanks!
2013-01-03T01:29:11.736030+00:00 hs kernel: MODE SENSE: unimplemented page/subpage: 0x1c/0x00
2013-01-03T01:29:11.756000+00:00 hs kernel: MODE SENSE: unimplemented page/subpage: 0x1c/0x00
2013-01-03T01:29:45.097509+00:00 hs kernel: iscsi_ttx: page allocation failure: order:4, mode:0xc0d0
2013-01-03T01:29:45.097532+00:00 hs kernel: Pid: 7620, comm: iscsi_ttx Not tainted 3.7.1-gentoo #1
2013-01-03T01:29:45.097535+00:00 hs kernel: Call Trace:
2013-01-03T01:29:45.110094+00:00 hs kernel: [<ffffffff8109fead>] warn_alloc_failed+0x10a/0x11f
2013-01-03T01:29:45.110137+00:00 hs kernel: [<ffffffff810a26c2>] ? __alloc_pages_direct_compact+0x1b6/0x1c7
2013-01-03T01:29:45.110142+00:00 hs kernel: [<ffffffff810a2d52>] __alloc_pages_nodemask+0x67f/0x6d8
2013-01-03T01:29:45.110146+00:00 hs kernel: [<ffffffff810cbc0e>] alloc_pages_current+0xc0/0xdd
2013-01-03T01:29:45.110150+00:00 hs kernel: [<ffffffff8109f3f8>] __get_free_pages+0x9/0x38
2013-01-03T01:29:45.110154+00:00 hs kernel: [<ffffffff810d46fb>] __kmalloc+0x2e/0xc3
2013-01-03T01:29:45.110158+00:00 hs kernel: [<ffffffffa0654250>] kzalloc.clone.15+0xe/0x10 [iscsi_target_mod]
2013-01-03T01:29:45.110170+00:00 hs kernel: [<ffffffffa0654299>] iscsit_build_sendtargets_response+0x47/0x33b [iscsi_target_mod]
2013-01-03T01:29:45.110173+00:00 hs kernel: [<ffffffff8145b406>] ? schedule_timeout+0x22/0xd5
2013-01-03T01:29:45.110177+00:00 hs kernel: [<ffffffff8145ce49>] ? _raw_spin_lock_irqsave+0xd/0x27
2013-01-03T01:29:45.110187+00:00 hs kernel: [<ffffffff810d1f5d>] ? virt_to_head_page+0x9/0x2c
2013-01-03T01:29:45.110191+00:00 hs kernel: [<ffffffff81058bf6>] ? update_curr+0x67/0x9a
2013-01-03T01:29:45.110194+00:00 hs kernel: [<ffffffff81059bf4>] ? hrtick_update+0x16/0x43
2013-01-03T01:29:45.110198+00:00 hs kernel: [<ffffffff81059d75>] ? dequeue_task_fair+0x154/0x163
2013-01-03T01:29:45.110202+00:00 hs kernel: [<ffffffff81000e2e>] ? __switch_to+0x1e1/0x3c6
2013-01-03T01:29:45.110205+00:00 hs kernel: [<ffffffff81059151>] ? cpumask_next+0x18/0x1a
2013-01-03T01:29:45.110209+00:00 hs kernel: [<ffffffff8100880d>] ? native_sched_clock+0x3b/0x3d
2013-01-03T01:29:45.110213+00:00 hs kernel: [<ffffffff8103a96b>] ? _local_bh_enable_ip.clone.8+0x20/0x89
2013-01-03T01:29:45.110467+00:00 hs kernel: [<ffffffff8103a9dd>] ? local_bh_enable_ip+0x9/0xb
2013-01-03T01:29:45.110492+00:00 hs kernel: [<ffffffffa065864c>] handle_response_queue+0xdcb/0x1205 [iscsi_target_mod]
2013-01-03T01:29:45.110497+00:00 hs kernel: [<ffffffff81054a06>] ? check_preempt_curr+0x63/0x73
2013-01-03T01:29:45.110500+00:00 hs kernel: [<ffffffff81058bf6>] ? update_curr+0x67/0x9a
2013-01-03T01:29:45.110503+00:00 hs kernel: [<ffffffff81059bf4>] ? hrtick_update+0x16/0x43
2013-01-03T01:29:45.110507+00:00 hs kernel: [<ffffffff81059d75>] ? dequeue_task_fair+0x154/0x163
2013-01-03T01:29:45.110511+00:00 hs kernel: [<ffffffff81000e2e>] ? __switch_to+0x1e1/0x3c6
2013-01-03T01:29:45.110514+00:00 hs kernel: [<ffffffff8105a1f3>] ? pick_next_task_fair+0x11e/0x13d
2013-01-03T01:29:45.110518+00:00 hs kernel: [<ffffffff8105344c>] ? need_resched+0x1e/0x28
2013-01-03T01:29:45.110522+00:00 hs kernel: [<ffffffff8145c478>] ? __schedule+0x455/0x46c
2013-01-03T01:29:45.110525+00:00 hs kernel: [<ffffffff8105679c>] ? try_to_wake_up+0x1ae/0x1ae
2013-01-03T01:29:45.110528+00:00 hs kernel: [<ffffffff8103a9dd>] ? local_bh_enable_ip+0x9/0xb
2013-01-03T01:29:45.110532+00:00 hs kernel: [<ffffffff8145cdb4>] ? _raw_spin_unlock_bh+0x10/0x12
2013-01-03T01:29:45.110537+00:00 hs kernel: [<ffffffffa06527c7>] ? iscsit_get_cmd_from_immediate_queue+0x36/0x8c [iscsi_target_mod]
2013-01-03T01:29:45.110541+00:00 hs kernel: [<ffffffffa0658ebe>] iscsi_target_tx_thread+0x438/0x442 [iscsi_target_mod]
2013-01-03T01:29:45.110545+00:00 hs kernel: [<ffffffff8104c3f6>] ? wake_up_bit+0x25/0x25
2013-01-03T01:29:45.110548+00:00 hs kernel: [<ffffffffa0658a86>] ? handle_response_queue+0x1205/0x1205 [iscsi_target_mod]
2013-01-03T01:29:45.110552+00:00 hs kernel: [<ffffffff8104be5b>] kthread+0x90/0x98
2013-01-03T01:29:45.110555+00:00 hs kernel: [<ffffffff810393c0>] ? do_exit+0x7a9/0x7ab
2013-01-03T01:29:45.110560+00:00 hs kernel: [<ffffffff8104bdcb>] ? kthread_freezable_should_stop+0x3c/0x3c
2013-01-03T01:29:45.110564+00:00 hs kernel: [<ffffffff8145d72c>] ret_from_fork+0x7c/0xb0
2013-01-03T01:29:45.110567+00:00 hs kernel: [<ffffffff8104bdcb>] ? kthread_freezable_should_stop+0x3c/0x3c
2013-01-03T01:29:45.110570+00:00 hs kernel: Mem-Info:
2013-01-03T01:29:45.110573+00:00 hs kernel: Node 0 DMA per-cpu:
2013-01-03T01:29:45.110576+00:00 hs kernel: CPU 0: hi: 0, btch: 1 usd: 0
2013-01-03T01:29:45.110579+00:00 hs kernel: CPU 1: hi: 0, btch: 1 usd: 0
2013-01-03T01:29:45.110587+00:00 hs kernel: Node 0 DMA32 per-cpu:
2013-01-03T01:29:45.110590+00:00 hs kernel: CPU 0: hi: 186, btch: 31 usd: 0
2013-01-03T01:29:45.110593+00:00 hs kernel: CPU 1: hi: 186, btch: 31 usd: 0
2013-01-03T01:29:45.110596+00:00 hs kernel: Node 0 Normal per-cpu:
2013-01-03T01:29:45.110599+00:00 hs kernel: CPU 0: hi: 186, btch: 31 usd: 0
2013-01-03T01:29:45.110602+00:00 hs kernel: CPU 1: hi: 186, btch: 31 usd: 0
2013-01-03T01:29:45.110606+00:00 hs kernel: active_anon:526416 inactive_anon:202500 isolated_anon:0
2013-01-03T01:29:45.110613+00:00 hs kernel: active_file:618980 inactive_file:526404 isolated_file:0
2013-01-03T01:29:45.110617+00:00 hs kernel: unevictable:8 dirty:2057 writeback:0 unstable:0
2013-01-03T01:29:45.110621+00:00 hs kernel: free:54995 slab_reclaimable:61711 slab_unreclaimable:10444
2013-01-03T01:29:45.110624+00:00 hs kernel: mapped:3194 shmem:44 pagetables:3095 bounce:0
2013-01-03T01:29:45.110627+00:00 hs kernel: free_cma:0
2013-01-03T01:29:45.110639+00:00 hs kernel: Node 0 DMA free:15908kB min:128kB low:160kB high:192kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15652kB 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 free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
2013-01-03T01:29:45.110643+00:00 hs kernel: lowmem_reserve[]: 0 3503 8039 8039
2013-01-03T01:29:45.110660+00:00 hs kernel: Node 0 DMA32 free:100784kB min:29396kB low:36744kB high:44092kB active_anon:377964kB inactive_anon:377968kB active_file:1452952kB inactive_file:1082588kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3588032kB mlocked:0kB dirty:400kB writeback:0kB mapped:1008kB shmem:36kB slab_reclaimable:146892kB slab_unreclaimable:4688kB kernel_stack:280kB pagetables:2872kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
2013-01-03T01:29:45.110664+00:00 hs kernel: lowmem_reserve[]: 0 0 4536 4536
2013-01-03T01:29:45.110694+00:00 hs kernel: Node 0 Normal free:103288kB min:38056kB low:47568kB high:57084kB active_anon:1727700kB inactive_anon:432032kB active_file:1022968kB inactive_file:1023028kB unevictable:32kB isolated(anon):0kB isolated(file):0kB present:4644864kB mlocked:32kB dirty:7828kB writeback:0kB mapped:11768kB shmem:140kB slab_reclaimable:99952kB slab_unreclaimable:37088kB kernel_stack:1872kB pagetables:9508kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
2013-01-03T01:29:45.110698+00:00 hs kernel: lowmem_reserve[]: 0 0 0 0
2013-01-03T01:29:45.110702+00:00 hs kernel: Node 0 DMA: 1*4kB 0*8kB 0*16kB 1*32kB 2*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15908kB
2013-01-03T01:29:45.110712+00:00 hs kernel: Node 0 DMA32: 15776*4kB 3500*8kB 527*16kB 39*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 100784kB
2013-01-03T01:29:45.110718+00:00 hs kernel: Node 0 Normal: 20294*4kB 2722*8kB 21*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 103288kB
2013-01-03T01:29:45.110721+00:00 hs kernel: 1153226 total pagecache pages
2013-01-03T01:29:45.110724+00:00 hs kernel: 7739 pages in swap cache
2013-01-03T01:29:45.110728+00:00 hs kernel: Swap cache stats: add 172067, delete 164328, find 30334/33161
2013-01-03T01:29:45.110731+00:00 hs kernel: Free swap = 3648356kB
2013-01-03T01:29:45.110733+00:00 hs kernel: Total swap = 4194300kB
2013-01-03T01:29:45.110740+00:00 hs kernel: 2097136 pages RAM
2013-01-03T01:29:45.110760+00:00 hs kernel: 51356 pages reserved
2013-01-03T01:29:45.110763+00:00 hs kernel: 1753488 pages shared
2013-01-03T01:29:45.110766+00:00 hs kernel: 1036003 pages non-shared
2013-01-03T01:29:45.110769+00:00 hs kernel: Unable to allocate memory for sendtargets response.
