From: Yongqiang Yang Subject: Re: Filesystem benchmarks on reasonably fast hardware Date: Wed, 27 Jul 2011 11:39:08 +0800 Message-ID: References: <20110717160501.GA1437@logfs.org> <20110718120751.GH14869@thunk.org> <20110718124229.GG1437@logfs.org> <20110725151825.GI3469@thunk.org> <20110725182037.GE26160@logfs.org> <20110726145736.GA7684@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org To: =?ISO-8859-1?Q?J=F6rn_Engel?= , "Ted Ts'o" Return-path: In-Reply-To: <20110726145736.GA7684@thunk.org> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hi J=F6rn and Ted, Could you anyone send out the ext4 lock stat on the list? Thank you, Yongqiang. On Tue, Jul 26, 2011 at 10:57 PM, Ted Ts'o wrote: > On Mon, Jul 25, 2011 at 08:20:37PM +0200, J=F6rn Engel wrote: >> On Mon, 25 July 2011 11:18:25 -0400, Ted Ts'o wrote: >> > >> > Did you have a chance to do an ext4 lockstat run? > > Hi J=F6rn, > > Thanks for forwarding it to me. =A0It's the same problem as in XFS, t= he > excessive coverage of the i_mutex lock. =A0In ext4's case, it's in th= e > generic generic_file_aio_write() machinery where we need to do the > lock busting. =A0(XFS apparently doesn't use the generic routines, so > the fix that Dave did won't help ext3 and ext4.) > > I don't have the time to look at it now, but I'll put it on my todo > list; or maybe someone with a bit more time can look into how we migh= t > be able to use a similar approach in the generic file system code. > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0 =A0 =A0 - Ted > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html > --=20 Best Wishes Yongqiang Yang -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html