linux-kernel - Re: [PATCH v4 0/2] nfs/sunrpc: allow freezing of tasks with NFS calls in flight

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Message-ID: <20111201184932.GB13173@google.com>
Date:	Thu, 1 Dec 2011 10:49:32 -0800
From:	Tejun Heo <tj@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Jeff Layton <jlayton@...hat.com>, linux-kernel@...r.kernel.org,
	linux-nfs@...r.kernel.org, linux-pm@...r.kernel.org,
	john@...va.com, trond.myklebust@...app.com,
	marek.belisko@...il.com, awilliam@...hat.com
Subject: Re: [PATCH v4 0/2] nfs/sunrpc: allow freezing of tasks with NFS
 calls in flight

On Wed, Nov 30, 2011 at 08:43:13PM +0100, Rafael J. Wysocki wrote:
> On Tuesday, November 29, 2011, Jeff Layton wrote:
> > This patchset is the fourth attempt at fixing the issues with suspending
> > a machine that has an active NFS mount.
> > 
> > The bug reported against Fedora is here:
> > 
> >     https://bugzilla.redhat.com/show_bug.cgi?id=717735
> > 
> > The main difference from v3 is that I've fixed a stupid set of errors in
> > freezable_schedule_timeout_killable. The if condition was reversed from
> > what it should have been, and the code did not call freezer_count()
> > again when it was going to return early.
> > 
> > Tejun has mentioned that the extra try_to_freeze() calls are unnecessary
> > on top of the pm-freezer changes, but this set should work on as
> > expected on top of 3.2-ish kernels. In the meantime, I'll look over the
> > pm-freezer changes and see whether I need to make changes in this set
> > for 3.3.
> > 
> > Jeff Layton (2):
> >   sunrpc: make rpc_wait_bit_killable handle freeze events
> >   nfs: make TASK_KILLABLE sleeps attempt to freeze
> 
> Both patches applied to linux-pm/linux-next.  I'll move them to
> linux-pm/pm-freezer in a couple of days if there are no problems with
> them.

Rafael, I think the extra try_to_freeze() is actually incorrect on top
of pm-freezer.  Jeff, can you please remove that?

Thanks.

-- 
tejun
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