Commit 06fa45d3 authored by Evgeniy Dushistov's avatar Evgeniy Dushistov Committed by Linus Torvalds

[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: default avatarEvgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1fb32b7b
......@@ -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;
......
......@@ -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 @@ struct page *ufs_get_locked_page(struct address_space *mapping,
/* 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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