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Message-ID: <20130809191542.GD25306@dhcp-26-207.brq.redhat.com>
Date: Fri, 9 Aug 2013 21:15:42 +0200
From: Alexander Gordeev <agordeev@...hat.com>
To: Mike Christie <mchristie@...ionio.com>
Cc: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
Jeff Garzik <jgarzik@...ox.com>,
linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH RESEND 0/1] AHCI: Optimize interrupt processing
On Sat, Jul 20, 2013 at 09:48:28AM -0500, Mike Christie wrote:
> What about the attached only compile tested patch. The patch has the mq
> block code work like the non mq code for bio cleanups.
Not sure if it is related to the patch or not, but it never returns from
wait_for_completion_io(&wait) in blkdev_issue_flush():
# ps axl | awk '$10 ~ /D\+/'
4 0 938 879 20 0 111216 656 blkdev D+ pts/1 0:00 fdisk/dev/sda
#
# cat /proc/938/stack
[<ffffffff812a8a5c>] blkdev_issue_flush+0xfc/0x160
[<ffffffff811ac606>] blkdev_fsync+0x96/0xc0
[<ffffffff811a2f4d>] do_fsync+0x5d/0x90
[<ffffffff811a3330>] SyS_fsync+0x10/0x20
[<ffffffff81611582>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff
Any ideas?
Thanks!
--
Regards,
Alexander Gordeev
agordeev@...hat.com
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