From: Christoph Hellwig <hch@lst.de>
To: "jianchao.wang" <jianchao.w.wang@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>,
Keith Busch <keith.busch@intel.com>,
axboe@kernel.dk, martin.petersen@oracle.com,
josef@toxicpanda.com, ulf.hansson@linaro.org,
linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/5]stop normal completion path entering a timeout req
Date: Fri, 22 Jun 2018 17:10:43 +0200 [thread overview]
Message-ID: <20180622151043.GA13470@lst.de> (raw)
In-Reply-To: <a68ad043-26a1-d3d8-2009-504ba4230e0f@oracle.com>
On Thu, Jun 21, 2018 at 04:22:22PM +0800, jianchao.wang wrote:
> > Trace, please. With the latest kernel. I'm not saying that there
> > is nothing to fix, but the mode of never completing once timeout
> > requests as currently done is SCSI is clearly broken.
> >
>
> I didn't find the existing method to simulate this.
> So I modified the scsi-debug as following patch as install it as following:
> modprobe scsi-debug delay=-1 ndelay=-1
> Both 4.17-rc1 and 4.18-rc1 with this patch set could survive from the test.
What tree is this against? I can't apply it to either current Linus'
tree or 4.17 for that matter.
Also I'm not sure this blk_abort_request call is representative
of the real world. Drivers do drain their queues before calling
it in general, e.g. take a look at ata_eh_set_pending for the
probably most common user.
next prev parent reply other threads:[~2018-06-22 15:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-20 13:22 [PATCH 0/5]stop normal completion path entering a timeout req Jianchao Wang
2018-06-20 13:22 ` [PATCH 1/5] blk-mq: prevent normal completion from entering a timeout request Jianchao Wang
2018-06-20 13:22 ` [PATCH 2/5] nbd: use __blk_mq_complete_request in timeout path Jianchao Wang
2018-06-20 14:13 ` Josef Bacik
2018-06-20 13:22 ` [PATCH 3/5] null_blk: " Jianchao Wang
2018-06-20 13:22 ` [PATCH 4/5] mmc: " Jianchao Wang
2018-06-20 13:22 ` [PATCH 5/5] nvme: " Jianchao Wang
2018-06-20 14:39 ` Christoph Hellwig
2018-06-21 2:09 ` jianchao.wang
2018-06-24 18:07 ` Sagi Grimberg
2018-06-25 1:40 ` jianchao.wang
2018-06-25 18:51 ` Sagi Grimberg
2018-06-20 18:16 ` [PATCH 0/5]stop normal completion path entering a timeout req Keith Busch
2018-06-21 1:43 ` jianchao.wang
2018-06-21 8:19 ` Christoph Hellwig
2018-06-21 8:22 ` jianchao.wang
2018-06-22 15:10 ` Christoph Hellwig [this message]
2018-06-25 1:29 ` jianchao.wang
2018-06-21 13:13 ` jianchao.wang
2018-06-21 15:01 ` Keith Busch
2018-06-21 18:21 ` Bart Van Assche
2018-06-21 21:15 ` Keith Busch
2018-06-21 21:30 ` Bart Van Assche
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