From e7ff6aed8761b2c86cd9ab7083e512de2b8cfa48 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Sat, 10 Feb 2007 18:37:46 +1100 Subject: [PATCH] [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 Signed-off-by: Christoph Hellwig Signed-off-by: Tim Shimmin --- fs/xfs/linux-2.6/xfs_lrw.c | 10 +++------- 1 file 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 0b5c9b6774c8..ff8d64eba9f8 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) -- 2.20.1