From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Mg1ly-0004am-PA for qemu-devel@nongnu.org; Tue, 25 Aug 2009 15:33:38 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Mg1lu-0004XE-2N for qemu-devel@nongnu.org; Tue, 25 Aug 2009 15:33:38 -0400 Received: from [199.232.76.173] (port=51523 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Mg1lt-0004X5-RJ for qemu-devel@nongnu.org; Tue, 25 Aug 2009 15:33:33 -0400 Received: from mail-fx0-f211.google.com ([209.85.220.211]:40446) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Mg1lt-0006GG-GO for qemu-devel@nongnu.org; Tue, 25 Aug 2009 15:33:33 -0400 Received: by fxm7 with SMTP id 7so2691268fxm.34 for ; Tue, 25 Aug 2009 12:33:30 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20090825181120.GA4863@lst.de> References: <20090825181120.GA4863@lst.de> Date: Tue, 25 Aug 2009 14:33:30 -0500 Message-ID: <90eb1dc70908251233m4b90ddfuabb4d26bccd62c63@mail.gmail.com> From: Javier Guerra Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] Re: Notes on block I/O data integrity List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christoph Hellwig Cc: rusty@rustcorp.com.au, qemu-devel@nongnu.org, kvm@vger.kernel.org On Tue, Aug 25, 2009 at 1:11 PM, Christoph Hellwig wrote: > =C2=A0- barrier requests and cache flushes are supported by all local > =C2=A0 disk filesystem in popular use (btrfs, ext3, ext4, reiserfs, XFS). > =C2=A0 However unlike the other filesystems ext3 does _NOT_ enable barrie= rs > =C2=A0 and cache flush requests by default. what about LVM? iv'e read somewhere that it used to just eat barriers used by XFS, making it less safe than simple partitions. --=20 Javier