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authorEvgeniy Dushistov <dushistov@mail.ru>2006-08-05 12:13:57 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-06 08:57:46 -0700
commit06fa45d3a19c6fbfccbf295e9f08087492338631 (patch)
tree24cc6843b98272e8ef5a8a1c78ef5b452f4a2d84
parent1fb32b7bd8203d0175649a75ede3ee7634d6a941 (diff)
downloadop-kernel-dev-06fa45d3a19c6fbfccbf295e9f08087492338631.zip
op-kernel-dev-06fa45d3a19c6fbfccbf295e9f08087492338631.tar.gz
[PATCH] ufs: handle truncated pages
ufs_get_locked_page is called twice in ufs code, one time in ufs_truncate path(we allocated last block), and another time when fragments are reallocated. In ideal world in the second case on allocation/free block layer we should not know that things like `truncate' exists, but now with such crutch like ufs_get_locked_page we can (or should?) skip truncated pages. Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/ufs/balloc.c2
-rw-r--r--fs/ufs/util.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index b01804b..b823814 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -248,7 +248,7 @@ static void ufs_change_blocknr(struct inode *inode, unsigned int baseblk,
if (likely(cur_index != index)) {
page = ufs_get_locked_page(mapping, index);
- if (IS_ERR(page))
+ if (!page || IS_ERR(page)) /* it was truncated or EIO */
continue;
} else
page = locked_page;
diff --git a/fs/ufs/util.c b/fs/ufs/util.c
index 005d681..22f820a 100644
--- a/fs/ufs/util.c
+++ b/fs/ufs/util.c
@@ -251,7 +251,6 @@ struct page *ufs_get_locked_page(struct address_space *mapping,
{
struct page *page;
-try_again:
page = find_lock_page(mapping, index);
if (!page) {
page = read_cache_page(mapping, index,
@@ -271,7 +270,8 @@ try_again:
/* Truncate got there first */
unlock_page(page);
page_cache_release(page);
- goto try_again;
+ page = NULL;
+ goto out;
}
if (!PageUptodate(page) || PageError(page)) {
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