diff options
| author | Dave Chinner <dchinner@redhat.com> | 2011-03-26 09:13:08 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2011-03-26 09:13:08 +1100 |
| commit | 8287889742940cf3c416e755322090d09f2829be (patch) | |
| tree | 50d67d48b4375a80b5ed04cc6d4cc88912c270f6 | |
| parent | 0c9ba97318fc9a905bcc1419b6966de061203a70 (diff) | |
| download | kernel_samsung_smdk4412-8287889742940cf3c416e755322090d09f2829be.tar.gz kernel_samsung_smdk4412-8287889742940cf3c416e755322090d09f2829be.tar.bz2 kernel_samsung_smdk4412-8287889742940cf3c416e755322090d09f2829be.zip | |
xfs: preallocation transactions do not need to be synchronous
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 <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_file.c | 6 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_ioctl.c | 4 | ||||
| -rw-r--r-- | fs/xfs/xfs_vnodeops.c | 3 | ||||
| -rw-r--r-- | fs/xfs/xfs_vnodeops.h | 1 |
4 files changed, 12 insertions, 2 deletions
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index a55c1b46b21..52aadfbed13 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)) return -EOPNOTSUPP; @@ -918,7 +919,10 @@ xfs_file_fallocate( goto out_unlock; } - error = -xfs_change_file_space(ip, cmd, &bf, 0, XFS_ATTR_NOLOCK); + if (file->f_flags & O_DSYNC) + attr_flags |= XFS_ATTR_SYNC; + + error = -xfs_change_file_space(ip, cmd, &bf, 0, attr_flags); 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 0ca0e3c024d..acca2c5ca3f 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 37d8146ee15..c48b4217ec4 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 f6702927eee..3bcd23353d6 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); |