From: Kent Overstreet <kmo@daterainc.com>
To: majianpeng <majianpeng@gmail.com>
Cc: linux-bcache <linux-bcache@vger.kernel.org>
Subject: Re: [PATCH 2/3] bcache: Avoid hung task happen.
Date: Wed, 8 Jan 2014 13:34:02 -0800 [thread overview]
Message-ID: <20140108213402.GG7291@kmo-pixel> (raw)
In-Reply-To: <201401081939218365334@gmail.com>
On Wed, Jan 08, 2014 at 07:39:26PM +0800, majianpeng wrote:
> Because after kthread_create, the state of kthread is TASK_UNINTERRUPTIBLE.
> If we don't wake up dc->writeback_thread, the thread will be hung-task.
> For those reasons, we don't wake up writeback_thread:
> A:only create backed device
> B:create backed device and cache device, but don't write at once
> C:write without writeback poliy
>
> So like the way of create gc_thread, after creating writeback_thread, i
> set the state is TASK_INTERRUPTIBLE.
I've seen this issue, but this isn't even where the sleep happens,
there's no way this could be fixing it..
next prev parent reply other threads:[~2014-01-08 21:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 11:39 [PATCH 2/3] bcache: Avoid hung task happen majianpeng
2014-01-08 21:34 ` Kent Overstreet [this message]
2014-01-09 3:00 ` majianpeng
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