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| author | David Chinner <dgc@sgi.com> | 2007-02-10 18:37:46 +1100 |
|---|---|---|
| committer | Tim Shimmin <tes@sgi.com> | 2007-02-10 18:37:46 +1100 |
| commit | e7ff6aed8761b2c86cd9ab7083e512de2b8cfa48 (patch) | |
| tree | 7a3e7e8ba879bbd72f55cbada44ebe542b179087 | |
| parent | 6be145bfb1ce93b2dbb854fee66fbb8d04916339 (diff) | |
| download | op-kernel-dev-e7ff6aed8761b2c86cd9ab7083e512de2b8cfa48.zip op-kernel-dev-e7ff6aed8761b2c86cd9ab7083e512de2b8cfa48.tar.gz | |
[XFS] Don't use kmap in xfs_iozero.
kmap() is inefficient and does not scale well. kmap_atomic() is a better
choice. Use the generic wrapper function instead of open coding the
kmap-memset-dcache flush-kunmap stuff.
SGI-PV: 960904
SGI-Modid: xfs-linux-melb:xfs-kern:28041a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_lrw.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 0b5c9b6..ff8d64e 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -137,7 +137,6 @@ xfs_iozero( unsigned bytes; struct page *page; struct address_space *mapping; - char *kaddr; int status; mapping = ip->i_mapping; @@ -155,15 +154,13 @@ xfs_iozero( if (!page) break; - kaddr = kmap(page); status = mapping->a_ops->prepare_write(NULL, page, offset, offset + bytes); - if (status) { + if (status) goto unlock; - } - memset((void *) (kaddr + offset), 0, bytes); - flush_dcache_page(page); + memclear_highpage_flush(page, offset, bytes); + status = mapping->a_ops->commit_write(NULL, page, offset, offset + bytes); if (!status) { @@ -172,7 +169,6 @@ xfs_iozero( } unlock: - kunmap(page); unlock_page(page); page_cache_release(page); if (status) |
