_xfs_buf_ioapply: no ops on block 0x188e78/0x8 on vanilla 4.4.11

[Stefan Priebe - Profihost AG]

Hi,

another issue i'm having with 4.4.11 is the following trace after a reboot:
[  541.661121] XFS (dm-0): _xfs_buf_ioapply: no ops on block 0x188e78/0x8
[  541.662423] ffff88013a3b3000: 44 51 01 01 00 00 00 00 00 00 00 00 00
00 00 00  DQ..............
[  541.663258] ffff88013a3b3010: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00  ................
[  541.664156] ffff88013a3b3020: 00 00 00 00 00 00 00 00 00 00 00 00 00
0b db fd  ................
[  541.664930] ffff88013a3b3030: 00 00 00 00 00 01 9e 82 00 00 00 00 00
00 00 00  ................
[  541.665704] CPU: 0 PID: 489 Comm: xfsaild/dm-0 Not tainted 4.4.11 #1
[  541.666486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014
[  541.667276]  0000000000000000 ffff880037a57c70 ffffffffbe3b3c33
0000000000000001
[  541.668094]  ffff880139d16900 ffff880037a57d18 ffffffffbe31c681
0000000000000000
[  541.668896]  ffff880139d16980 0000000000000000 0000000000000000
0000000000000000
[  541.669705] Call Trace:
[  541.670491]  [<ffffffffbe3b3c33>] dump_stack+0x63/0x90
[  541.671286]  [<ffffffffbe31c681>] _xfs_buf_ioapply+0x3e1/0x440
[  541.672113]  [<ffffffffbe0aaba0>] ? wake_up_q+0x70/0x70
[  541.672901]  [<ffffffffbe31df99>] ? __xfs_buf_delwri_submit+0x179/0x270
[  541.673704]  [<ffffffffbe31dcc4>] xfs_buf_submit+0x64/0x1c0
[  541.674506]  [<ffffffffbe31df99>] __xfs_buf_delwri_submit+0x179/0x270
[  541.675321]  [<ffffffffbe31eea0>] ?
xfs_buf_delwri_submit_nowait+0x20/0x30
[  541.676129]  [<ffffffffbe31eea0>] xfs_buf_delwri_submit_nowait+0x20/0x30
[  541.676930]  [<ffffffffbe3495f6>] xfsaild+0x2a6/0x710
[  541.677738]  [<ffffffffbe349350>] ? xfs_trans_ail_cursor_first+0x90/0x90
[  541.678557]  [<ffffffffbe349350>] ? xfs_trans_ail_cursor_first+0x90/0x90
[  541.679357]  [<ffffffffbe09f36b>] kthread+0xdb/0x100
[  541.680136]  [<ffffffffbe09f290>] ? kthread_park+0x60/0x60
[  541.680912]  [<ffffffffbe6972cf>] ret_from_fork+0x3f/0x70
[  541.681708]  [<ffffffffbe09f290>] ? kthread_park+0x60/0x60

I found a bug report from redhat here
https://bugzilla.redhat.com/show_bug.cgi?id=1234586 pointing to this commit:
xfs: handle dquot buffer readahead in log recovery correctly

which isn't part of 4.4. Is it missing from linux-stable?

i'm using XFS V5 with root quotas on in this case.

Greets,
Stefan