From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with SMTP id p2N6Cara074515 for ; Wed, 23 Mar 2011 01:12:41 -0500 Received: from ipmail06.adl6.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9ADC513FA477 for ; Tue, 22 Mar 2011 23:15:35 -0700 (PDT) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by cuda.sgi.com with ESMTP id ONhHfFWr1lzxeXJy for ; Tue, 22 Mar 2011 23:15:35 -0700 (PDT) From: Dave Chinner Subject: [PATCH 1/6] xfs: preallocation transactions do not need to be synchronous Date: Wed, 23 Mar 2011 17:14:25 +1100 Message-Id: <1300860870-15471-2-git-send-email-david@fromorbit.com> In-Reply-To: <1300860870-15471-1-git-send-email-david@fromorbit.com> References: <1300860870-15471-1-git-send-email-david@fromorbit.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Cc: aelder@sgi.com From: Dave Chinner Preallocation and hole punch transactions are currently synchronous and this is causing performance problems in some cases. The transactions don't need to be synchronous as we don't need to guarantee the preallocation is persistent on disk until a fdatasync, fsync, sync operation occurs. If the file is opened O_SYNC or O_DATASYNC, only then should the transaction be issued synchronously. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_file.c | 4 ++++ fs/xfs/linux-2.6/xfs_ioctl.c | 4 ++++ fs/xfs/xfs_vnodeops.c | 3 ++- fs/xfs/xfs_vnodeops.h | 1 + 4 files changed, 11 insertions(+), 1 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index ae59865..baa2cb3 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -896,6 +896,7 @@ xfs_file_fallocate( xfs_flock64_t bf; xfs_inode_t *ip = XFS_I(inode); int cmd = XFS_IOC_RESVSP; + int attr_flags = XFS_ATTR_NOLOCK; if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | @@ -922,6 +923,9 @@ xfs_file_fallocate( goto out_unlock; } + if (file->f_flags & O_DSYNC) + attr_flags |= XFS_ATTR_SYNC; + error = -xfs_change_file_space(ip, cmd, &bf, 0, XFS_ATTR_NOLOCK); if (error) goto out_unlock; diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index 0ca0e3c..acca2c5 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -624,6 +624,10 @@ xfs_ioc_space( if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) attr_flags |= XFS_ATTR_NONBLOCK; + + if (filp->f_flags & O_DSYNC) + attr_flags |= XFS_ATTR_SYNC; + if (ioflags & IO_INVIS) attr_flags |= XFS_ATTR_DMI; diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 37d8146..c48b421 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2831,7 +2831,8 @@ xfs_change_file_space( ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); - xfs_trans_set_sync(tp); + if (attr_flags & XFS_ATTR_SYNC) + xfs_trans_set_sync(tp); error = xfs_trans_commit(tp, 0); diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index f6702927..3bcd233 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -18,6 +18,7 @@ int xfs_setattr(struct xfs_inode *ip, struct iattr *vap, int flags); #define XFS_ATTR_NONBLOCK 0x02 /* return EAGAIN if operation would block */ #define XFS_ATTR_NOLOCK 0x04 /* Don't grab any conflicting locks */ #define XFS_ATTR_NOACL 0x08 /* Don't call xfs_acl_chmod */ +#define XFS_ATTR_SYNC 0x10 /* synchronous operation required */ int xfs_readlink(struct xfs_inode *ip, char *link); int xfs_release(struct xfs_inode *ip); -- 1.7.2.3 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs