linux-ext4 - Re: possible deadlock in flush

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Message-ID: <20181023194021.GA4182586@devbig004.ftw2.facebook.com>
Date:   Tue, 23 Oct 2018 12:40:21 -0700
From:   Tejun Heo <tj@...nel.org>
To:     "Theodore Y. Ts'o" <tytso@....edu>
Cc:     syzbot <syzbot+a50c7541a4a55cd49b02@...kaller.appspotmail.com>,
        adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        linux-fsdevel@...r.kernel.org, jiangshanlai@...il.com
Subject: Re: possible deadlock in flush_workqueue (2)

Hello,

On Tue, Oct 23, 2018 at 10:28:04AM -0400, Theodore Y. Ts'o wrote:
> The other, and I think better way, we could fix this is to have an
> alternate destroy_never_used_workqueue() function which skips the
> drain_workqueue().

Yeah, I'm okay with this approach.  Maybe name it
destroy_workqueue_skip_drain()?

Thanks.

-- 
tejun