From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Roland Dreier <roland@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Arjan van de Ven <arjan@infradead.org>,
shli@kernel.org
Subject: Re: [PATCH] Revert "driver core: synchronize device shutdown"
Date: Tue, 4 Mar 2014 20:38:58 -0800 [thread overview]
Message-ID: <20140305043858.GA2494@kroah.com> (raw)
In-Reply-To: <CAG4TOxONSsyokdy9Sw+fT21QA7E-uY572ZDoNf3V9f7D1ytyxQ@mail.gmail.com>
On Tue, Mar 04, 2014 at 08:15:36PM -0800, Roland Dreier wrote:
> > Hm, no one seems to have said anything for the past 5 years about this.
>
> It definitely is hard to hit -- you have to do "shutdown" or "reboot"
> right as something schedules async work. In our case we have some
> systems with a large and slightly flaky SAS fabric, so there's a
> constant level of re-probing SCSI disks, and we occasionally see
> reboots hanging due to waiting for never-finishing sd probe async
> work.
>
> AFAICT the synchronization does nothing useful and is just a remnant
> of a patch series where the real meat didn't get applied. But of
> course it would be great if Shaohua could confirm my understanding.
Shaohua's email address seems to now bounce :(
Arjan, any thoughts?
greg k-h
next prev parent reply other threads:[~2014-03-05 4:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-05 3:57 [PATCH] Revert "driver core: synchronize device shutdown" Roland Dreier
2014-03-05 4:09 ` Greg Kroah-Hartman
2014-03-05 4:15 ` Roland Dreier
2014-03-05 4:38 ` Greg Kroah-Hartman [this message]
2014-03-08 2:30 ` Arjan van de Ven
2014-03-09 6:02 ` Greg Kroah-Hartman
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