Large kmem_alloc()

[sigxcpu76]

This occurs randomly on 4.1.3-1-pve (Proxmox kernel). ZoL version: 0.6.4.1-1101_g356456b

[  579.000676] Large kmem_alloc(35416, 0x1000), please file an issue at:
https://github.com/zfsonlinux/zfs/issues/new
[  579.000687] CPU: 0 PID: 11185 Comm: zvol Tainted: P           O    4.1.3-1-pve #1
[  579.000688] Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 06/06/2014
[  579.000690]  0000000000000000 ffff88028a173bd8 ffffffff818015db ffff8803fa2121b8
[  579.000692]  000000000000c210 ffff88028a173c28 ffffffffc0247cc4 0000000000000017
[  579.000694]  00000000c5674a68 ffff88028a173c18 ffff8803c56656b8 000000000000114b
[  579.000696] Call Trace:
[  579.000702]  [<ffffffff818015db>] dump_stack+0x45/0x57
[  579.000715]  [<ffffffffc0247cc4>] spl_kmem_zalloc+0x164/0x1e0 [spl]
[  579.000736]  [<ffffffffc04208cb>] dmu_buf_hold_array_by_dnode+0x9b/0x4e0 [zfs]
[  579.000748]  [<ffffffffc0420ded>] dmu_buf_hold_array+0x5d/0x80 [zfs]
[  579.000760]  [<ffffffffc042217a>] dmu_write_req+0x6a/0x1e0 [zfs]
[  579.000785]  [<ffffffffc04c870b>] zvol_write+0x11b/0x470 [zfs]
[  579.000789]  [<ffffffffc024b53d>] taskq_thread+0x22d/0x480 [spl]
[  579.000792]  [<ffffffff810a6f80>] ? wake_up_state+0x20/0x20
[  579.000796]  [<ffffffffc024b310>] ? taskq_cancel_id+0x120/0x120 [spl]
[  579.000799]  [<ffffffff810996bb>] kthread+0xdb/0x100
[  579.000801]  [<ffffffff810995e0>] ? kthread_create_on_node+0x1c0/0x1c0
[  579.000803]  [<ffffffff81809322>] ret_from_fork+0x42/0x70
[  579.000805]  [<ffffffff810995e0>] ? kthread_create_on_node+0x1c0/0x1c0

[behlendorf]

Thanks for filing this. The issue has already been resolved in master.

[sigxcpu76]

Oh, sorry for bugging you then. Just followed the indications from the error message.