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From: "tj@kernel.org" <tj@kernel.org>
To: Bart Van Assche <Bart.VanAssche@wdc.com>
Cc: "axboe@kernel.dk" <axboe@kernel.dk>,
	"kernel-team@fb.com" <kernel-team@fb.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"osandov@fb.com" <osandov@fb.com>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"oleg@redhat.com" <oleg@redhat.com>, "hch@lst.de" <hch@lst.de>
Subject: Re: [PATCHSET v2] blk-mq: reimplement timeout handling
Date: Wed, 20 Dec 2017 16:08:05 -0800	[thread overview]
Message-ID: <20171221000805.GC1084507@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <1513813261.2603.36.camel@wdc.com>

On Wed, Dec 20, 2017 at 11:41:02PM +0000, Bart Van Assche wrote:
> On Tue, 2017-12-12 at 11:01 -0800, Tejun Heo wrote:
> > Currently, blk-mq timeout path synchronizes against the usual
> > issue/completion path using a complex scheme involving atomic
> > bitflags, REQ_ATOM_*, memory barriers and subtle memory coherence
> > rules.  Unfortunatley, it contains quite a few holes.
> 
> Hello Tejun,
> 
> An attempt to run SCSI I/O with this patch series applied resulted in
> the following:

Can you please try the v3?  There were a couple bugs that I missed
while testing earlier versions.

 http://lkml.kernel.org/r/20171216120726.517153-1-tj@kernel.org

Thanks.

-- 
tejun

  reply	other threads:[~2017-12-21  0:08 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-12 19:01 [PATCHSET v2] blk-mq: reimplement timeout handling Tejun Heo
2017-12-12 19:01 ` [PATCH 1/6] blk-mq: protect completion path with RCU Tejun Heo
2017-12-13  3:30   ` jianchao.wang
2017-12-13 16:13     ` Tejun Heo
2017-12-14  2:09       ` jianchao.wang
2017-12-14 17:01   ` Bart Van Assche
2017-12-14 17:01     ` Bart Van Assche
2017-12-14 18:14     ` tj
2017-12-12 19:01 ` [PATCH 2/6] blk-mq: replace timeout synchronization with a RCU and generation based scheme Tejun Heo
2017-12-12 21:37   ` Bart Van Assche
2017-12-12 21:37     ` Bart Van Assche
2017-12-12 21:44     ` tj
2017-12-13  5:07   ` jianchao.wang
2017-12-13 16:13     ` Tejun Heo
2017-12-14 18:51   ` Bart Van Assche
2017-12-14 18:51     ` Bart Van Assche
2017-12-14 19:19     ` tj
2017-12-14 21:13       ` Bart Van Assche
2017-12-14 21:13         ` Bart Van Assche
2017-12-15 13:30         ` tj
2017-12-14 20:20     ` Peter Zijlstra
2017-12-14 21:42       ` Bart Van Assche
2017-12-14 21:42         ` Bart Van Assche
2017-12-14 21:54         ` Peter Zijlstra
2017-12-15  2:12           ` jianchao.wang
2017-12-15  7:31             ` Peter Zijlstra
2017-12-15 15:14               ` jianchao.wang
2017-12-15  2:39           ` Mike Galbraith
2017-12-15  2:39             ` Mike Galbraith
2017-12-15 13:50       ` tj
2017-12-12 19:01 ` [PATCH 3/6] blk-mq: use blk_mq_rq_state() instead of testing REQ_ATOM_COMPLETE Tejun Heo
2017-12-12 19:01 ` [PATCH 4/6] blk-mq: make blk_abort_request() trigger timeout path Tejun Heo
2017-12-14 18:56   ` Bart Van Assche
2017-12-14 18:56     ` Bart Van Assche
2017-12-14 19:26     ` tj
2017-12-12 19:01 ` [PATCH 5/6] blk-mq: remove REQ_ATOM_COMPLETE usages from blk-mq Tejun Heo
2017-12-12 19:01 ` [PATCH 6/6] blk-mq: remove REQ_ATOM_STARTED Tejun Heo
2017-12-12 22:20   ` Bart Van Assche
2017-12-12 22:20     ` Bart Van Assche
2017-12-12 22:22     ` tj
2017-12-12 20:23 ` [PATCHSET v2] blk-mq: reimplement timeout handling Jens Axboe
2017-12-12 21:40   ` Tejun Heo
2017-12-20 23:41 ` Bart Van Assche
2017-12-20 23:41   ` Bart Van Assche
2017-12-21  0:08   ` tj [this message]
2017-12-21  1:00     ` Bart Van Assche
2017-12-21  1:00       ` Bart Van Assche

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