From: Nadav Amit <[email protected]>
To: Jens Axboe <[email protected]>
Cc: [email protected]
Subject: iouring locking issue in io_req_complete_post() / io_rsrc_node_ref_zero()
Date: Sun, 8 Aug 2021 21:36:18 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
Jens, others,
Sorry for bothering again, but I encountered a lockdep assertion failure:
[ 106.009878] ------------[ cut here ]------------
[ 106.012487] WARNING: CPU: 2 PID: 1777 at kernel/softirq.c:364 __local_bh_enable_ip+0xaa/0xe0
[ 106.014524] Modules linked in:
[ 106.015174] CPU: 2 PID: 1777 Comm: umem Not tainted 5.13.1+ #161
[ 106.016653] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/22/2020
[ 106.018959] RIP: 0010:__local_bh_enable_ip+0xaa/0xe0
[ 106.020344] Code: a9 00 ff ff 00 74 38 65 ff 0d a2 21 8c 7a e8 ed 1a 20 00 fb 66 0f 1f 44 00 00 5b 41 5c 5d c3 65 8b 05 e6 2d 8c 7a 85 c0 75 9a <0f> 0b eb 96 e8 2d 1f 20 00 eb a5 4c 89 e7 e8 73 4f 0c 00 eb ae 65
[ 106.026258] RSP: 0018:ffff88812e58fcc8 EFLAGS: 00010046
[ 106.028143] RAX: 0000000000000000 RBX: 0000000000000201 RCX: dffffc0000000000
[ 106.029626] RDX: 0000000000000007 RSI: 0000000000000201 RDI: ffffffff8898c5ac
[ 106.031340] RBP: ffff88812e58fcd8 R08: ffffffff8575dbbf R09: ffffed1028ef14f9
[ 106.032938] R10: ffff88814778a7c3 R11: ffffed1028ef14f8 R12: ffffffff85c9e9ae
[ 106.034363] R13: ffff88814778a000 R14: ffff88814778a7b0 R15: ffff8881086db890
[ 106.036115] FS: 00007fbcfee17700(0000) GS:ffff8881e0300000(0000) knlGS:0000000000000000
[ 106.037855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 106.039010] CR2: 000000c0402a5008 CR3: 000000011c1ac003 CR4: 00000000003706e0
[ 106.040453] Call Trace:
[ 106.041245] _raw_spin_unlock_bh+0x31/0x40
[ 106.042543] io_rsrc_node_ref_zero+0x13e/0x190
[ 106.043471] io_dismantle_req+0x215/0x220
[ 106.044297] io_req_complete_post+0x1b8/0x720
[ 106.045456] __io_complete_rw.isra.0+0x16b/0x1f0
[ 106.046593] io_complete_rw+0x10/0x20
[ .... The rest of the call-stack is my stuff ]
Apparently, io_req_complete_post() disables IRQs and this code-path seems
valid (IOW: I did not somehow cause this failure). I am not familiar with
this code, so some feedback would be appreciated.
Thanks,
Nadav
next reply other threads:[~2021-08-09 4:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 4:36 Nadav Amit [this message]
2021-08-09 13:49 ` iouring locking issue in io_req_complete_post() / io_rsrc_node_ref_zero() Jens Axboe
2021-08-09 22:01 ` Nadav Amit
2021-08-09 22:11 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox