From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Howells <dhowells@redhat.com>
Subject: Re: [PATCH 2/5] new fscache interface to check
	cache consistency
Date: Wed, 04 Sep 2013 18:26:10 +0100
Message-ID: <18284.1378315570@warthog.procyon.org.uk>
References: <CANP1eJFKGD_h6rcWMWpxp3yOD+rz6p2P0B+2CTcy1taDwM9rdg@mail.gmail.com>
	<cover.1375999914.git.milosz@adfin.com>
	<306cbe63f85921ad40b00e3c7071be19cb6adf04.1375999914.git.milosz@adfin.com>
	<18832.1378311843@warthog.procyon.org.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Cc: Sage Weil <sage@inktank.com>, linux-kernel@vger.kernel.org,
        "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
        "linux-cachefs@redhat.com" <linux-cachefs@redhat.com>,
        "Yan,
	Zheng" <zheng.z.yan@intel.com>,
        ceph-devel <ceph-devel@vger.kernel.org>
To: Milosz Tanski <milosz@adfin.com>
Return-path: <linux-cachefs-bounces@redhat.com>
In-Reply-To: <CANP1eJFKGD_h6rcWMWpxp3yOD+rz6p2P0B+2CTcy1taDwM9rdg@mail.gmail.com>
List-Unsubscribe: <https://www.redhat.com/mailman/options/linux-cachefs>,
	<mailto:linux-cachefs-request@redhat.com?subject=unsubscribe>
List-Archive: <https://www.redhat.com/archives/linux-cachefs>
List-Post: <mailto:linux-cachefs@redhat.com>
List-Help: <mailto:linux-cachefs-request@redhat.com?subject=help>
List-Subscribe: <https://www.redhat.com/mailman/listinfo/linux-cachefs>,
	<mailto:linux-cachefs-request@redhat.com?subject=subscribe>
Sender: linux-cachefs-bounces@redhat.com
Errors-To: linux-cachefs-bounces@redhat.com
List-Id: linux-fsdevel.vger.kernel.org

Milosz Tanski <milosz@adfin.com> wrote:

> If the cache is withdrawn and we're starting anew I would consider
> that to okay. I would consider an empty page cache for a cookie to be
> consistent since there's nothing stale that I can read. Unless there's
> another synchronization issue that I'm missing in fscache.

The problem is that the fscache_object struct may be deallocated whilst you're
using it.

David