diff options
| author | Dave Chinner <dchinner@redhat.com> | 2016-02-15 07:20:50 +0100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-02-15 07:20:50 +0100 |
| commit | 988ef927926aa3481cbf144f235c0cefd7deb9e4 (patch) | |
| tree | 4b008acb2648a7f200ac3fe47bd133d0b8d55d23 /fs/xfs | |
| parent | Linux 4.5-rc2 (diff) | |
| download | linux-988ef927926aa3481cbf144f235c0cefd7deb9e4.tar.xz linux-988ef927926aa3481cbf144f235c0cefd7deb9e4.zip | |
xfs: remove nonblocking mode from xfs_vm_writepage
Remove the nonblocking optimisation done for mapping lookups during
writeback. It's not clear that leaving a hole in the writeback range
just because we couldn't get a lock is really a win, as it makes us
do another small random IO later on rather than a large sequential
IO now.
As this gets in the way of sane error handling later on, just remove
for the moment and we can re-introduce an equivalent optimisation in
future if we see problems due to extent map lock contention.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_aops.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 379c089fb051..807744b19233 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -283,8 +283,7 @@ xfs_map_blocks( struct inode *inode, loff_t offset, struct xfs_bmbt_irec *imap, - int type, - int nonblocking) + int type) { struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; @@ -300,12 +299,7 @@ xfs_map_blocks( if (type == XFS_IO_UNWRITTEN) bmapi_flags |= XFS_BMAPI_IGSTATE; - if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { - if (nonblocking) - return -EAGAIN; - xfs_ilock(ip, XFS_ILOCK_SHARED); - } - + xfs_ilock(ip, XFS_ILOCK_SHARED); ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || (ip->i_df.if_flags & XFS_IFEXTENTS)); ASSERT(offset <= mp->m_super->s_maxbytes); @@ -955,7 +949,6 @@ xfs_vm_writepage( ssize_t len; int err, imap_valid = 0, uptodate = 1; int count = 0; - int nonblocking = 0; trace_xfs_writepage(inode, page, 0, 0); @@ -1055,9 +1048,6 @@ xfs_vm_writepage( offset = page_offset(page); type = XFS_IO_OVERWRITE; - if (wbc->sync_mode == WB_SYNC_NONE) - nonblocking = 1; - do { int new_ioend = 0; @@ -1117,8 +1107,7 @@ xfs_vm_writepage( * time. */ new_ioend = 1; - err = xfs_map_blocks(inode, offset, &imap, type, - nonblocking); + err = xfs_map_blocks(inode, offset, &imap, type); if (err) goto error; imap_valid = xfs_imap_valid(inode, &imap, offset); @@ -1188,9 +1177,6 @@ error: if (iohead) xfs_cancel_ioend(iohead); - if (err == -EAGAIN) - goto redirty; - xfs_aops_discard_page(page); ClearPageUptodate(page); unlock_page(page); |