From: Ming Lei <ming.lei@redhat.com>
To: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
=Oleksandr Natalenko <oleksandr@natalenko.name>,
"Luis R . Rodriguez" <mcgrof@kernel.org>,
Shaohua Li <shli@kernel.org>,
linux-raid@vger.kernel.org, Hannes Reinecke <hare@suse.com>,
Johannes Thumshirn <jthumshirn@suse.de>
Subject: Re: [PATCH v5 2/8] md: Neither resync nor reshape while the system is frozen
Date: Wed, 4 Oct 2017 19:30:22 +0800 [thread overview]
Message-ID: <20171004113021.GC17729@ming.t460p> (raw)
In-Reply-To: <20171002225218.18548-3-bart.vanassche@wdc.com>
On Mon, Oct 02, 2017 at 03:52:12PM -0700, Bart Van Assche wrote:
> Some people use the md driver on laptops and use the suspend and
> resume functionality. Since it is essential that submitting of
> new I/O requests stops before a hibernation image is created,
> interrupt the md resync and reshape actions if the system is
> being frozen. Note: the resync and reshape will restart after
> the system is resumed and a message similar to the following
> will appear in the system log:
>
> md: md0: data-check interrupted.
>
> Additionally, only allow resync or reshape activity to be
> started after system freezing is over.
Last time, I asked which issue is fixed by this patch, but
never get answered, so again, what is issue fixed by
this patch?
Given the following patches for making SCSI quiesce safe
is required in either PM suspend/resume or other path
of transport_spi revalidate. So once theses patches are
in, I don't see any I/O hang in suspend/resume given
the SCSI quiesce issue is very specific one, and not
see this issue on other kind of device.
Thanks,
Ming
next prev parent reply other threads:[~2017-10-04 11:30 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-02 22:52 [PATCH v5 0/8] block, scsi, md: Improve suspend and resume Bart Van Assche
2017-10-02 22:52 ` [PATCH v5 1/8] md: Introduce md_stop_all_writes() Bart Van Assche
2017-10-04 1:07 ` Luis R. Rodriguez
2017-10-02 22:52 ` [PATCH v5 2/8] md: Neither resync nor reshape while the system is frozen Bart Van Assche
2017-10-04 1:16 ` Luis R. Rodriguez
2017-10-04 16:58 ` Bart Van Assche
2017-10-04 16:58 ` Bart Van Assche
2017-10-04 11:30 ` Ming Lei [this message]
2017-10-04 15:38 ` Bart Van Assche
2017-10-04 15:38 ` Bart Van Assche
2017-10-02 22:52 ` [PATCH v5 3/8] block: Make q_usage_counter also track legacy requests Bart Van Assche
2017-10-02 22:52 ` [PATCH v5 4/8] block: Convert RQF_PREEMPT into REQ_PREEMPT Bart Van Assche
2017-10-04 6:57 ` Christoph Hellwig
2017-10-02 22:52 ` [PATCH v5 5/8] block: Add the QUEUE_FLAG_PREEMPT_ONLY request queue flag Bart Van Assche
2017-10-04 6:58 ` Christoph Hellwig
2017-10-02 22:52 ` [PATCH v5 6/8] scsi: Reduce suspend latency Bart Van Assche
2017-10-04 7:04 ` Christoph Hellwig
2017-10-04 15:41 ` Bart Van Assche
2017-10-02 22:52 ` [PATCH v5 7/8] scsi: Set QUEUE_FLAG_PREEMPT_ONLY while quiesced Bart Van Assche
2017-10-04 7:06 ` Christoph Hellwig
2017-10-04 15:44 ` Bart Van Assche
2017-10-02 22:52 ` [PATCH v5 8/8] block: Make SCSI device suspend and resume work reliably Bart Van Assche
2017-10-04 7:06 ` Christoph Hellwig
2017-10-04 15:45 ` Bart Van Assche
2017-10-03 16:01 ` [PATCH v5 0/8] block, scsi, md: Improve suspend and resume Oleksandr Natalenko
2017-10-04 6:56 ` Christoph Hellwig
2017-10-04 7:53 ` Ming Lei
2017-10-04 7:56 ` Ming Lei
2017-10-04 15:18 ` Bart Van Assche
2017-10-04 15:31 ` Ming Lei
2017-10-04 22:36 ` Bart Van Assche
2017-10-04 15:21 ` Bart Van Assche
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