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| author | Lachlan McIlroy <lachlan@sgi.com> | 2007-12-18 16:17:41 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2007-12-18 17:16:17 +1100 |
| commit | c734c79bc397eace039bea406997efa89f879c14 (patch) | |
| tree | 50da16cf18fa773ce5ccb9c6e1b59c13e681a0b7 /fs | |
| parent | c63a1190368771b8207d86c4217ae4afdf1cbd5e (diff) | |
| download | kernel_samsung_tuna-c734c79bc397eace039bea406997efa89f879c14.zip kernel_samsung_tuna-c734c79bc397eace039bea406997efa89f879c14.tar.gz kernel_samsung_tuna-c734c79bc397eace039bea406997efa89f879c14.tar.bz2 | |
[XFS] Don't wait for pending I/Os when purging blocks beyond eof.
On last close of a file we purge blocks beyond eof. The same code is used
when we truncate the file size down. In this case we need to wait for any
pending I/Os for dirty pages beyond the new eof. For the last close case
we are not changing the file size and therefore do not need to wait for
any I/Os to complete. This fixes a performance bottleneck where writes
into the page cache and cache flushes can become mutually exclusive.
SGI-PV: 964002
SGI-Modid: xfs-linux-melb:xfs-kern:30220a
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Peter Leckie <pleckie@sgi.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_inode.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index abf509a..3449480 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1459,8 +1459,10 @@ xfs_itruncate_start( mp = ip->i_mount; vp = XFS_ITOV(ip); - vn_iowait(ip); /* wait for the completion of any pending DIOs */ - + /* wait for the completion of any pending DIOs */ + if (new_size < ip->i_size) + vn_iowait(ip); + /* * Call toss_pages or flushinval_pages to get rid of pages * overlapping the region being removed. We have to use |