From: Boaz Harrosh <bharrosh@panasas.com>
To: Jeff Layton <jlayton@samba.org>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>,
axboe@kernel.dk, lucho@ionkov.net, tytso@mit.edu,
sage@inktank.com, ericvh@gmail.com, mfasheh@suse.com,
dedekind1@gmail.com, adrian.hunter@intel.com,
dhowells@redhat.com, sfrench@samba.org, jlbec@evilplan.org,
rminnich@sandia.gov, linux-cifs@vger.kernel.org, jack@suse.cz,
martin.petersen@oracle.com, neilb@suse.de, david@fromorbit.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org,
v9fs-developer@lists.sourceforge.net, ceph-devel@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-afs@lists.infradead.org,
ocfs2-devel@oss.oracle.com
Subject: Re: [PATCH 3/3] fs: Fix remaining filesystems to wait for stable page writeback
Date: Thu, 1 Nov 2012 15:23:54 -0700 [thread overview]
Message-ID: <5092F67A.2060203@panasas.com> (raw)
In-Reply-To: <20121101162254.03dbbd9a@tlielax.poochiereds.net>
On 11/01/2012 01:22 PM, Jeff Layton wrote:
> Hmm...I don't know...
>
> I've never been crazy about using the page lock for this, but in the
> absence of a better way to guarantee stable pages, it was what I ended
> up with at the time. cifs_writepages will hold the page lock until
> kernel_sendmsg returns. At that point the TCP layer will have copied
> off the page data so it's safe to release it.
>
> With this change though, we're going to end up blocking until the
> writeback flag clears, right? And I think that will happen when the
> reply comes in? So, we'll end up blocking for much longer than is
> really necessary in page_mkwrite with this change.
>
Hmm OK, that is a very good point. In that case it is just a simple
nack on Darrick's hunk to cifs. cifs is fine and should not be touched
Boaz
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next prev parent reply other threads:[~2012-11-01 22:24 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-01 7:58 [RFC PATCH v2 0/3] mm/fs: Implement faster stable page writes on filesystems Darrick J. Wong
2012-11-01 7:58 ` [PATCH 1/3] bdi: Track users that require stable page writes Darrick J. Wong
2012-11-01 13:31 ` Jan Kara
2012-11-01 18:21 ` Boaz Harrosh
2012-11-01 18:57 ` Darrick J. Wong
2012-11-01 22:56 ` Boaz Harrosh
2012-11-01 23:15 ` Jan Kara
2012-11-01 7:58 ` [PATCH 2/3] mm: Only enforce stable page writes if the backing device requires it Darrick J. Wong
2012-11-01 13:28 ` Jan Kara
2012-11-01 7:58 ` [PATCH 3/3] fs: Fix remaining filesystems to wait for stable page writeback Darrick J. Wong
2012-11-01 12:36 ` Jan Kara
2012-11-01 18:43 ` Boaz Harrosh
2012-11-01 20:22 ` Jeff Layton
2012-11-01 22:23 ` Boaz Harrosh [this message]
2012-11-01 22:47 ` Darrick J. Wong
2012-11-02 0:36 ` Jeff Layton
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