summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2017-03-16 16:27:48 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-12-20 10:07:25 +0100
commitd43dda072544ecf7890eab6a920fb602c9aafa63 (patch)
treec877a5b9c4660f9eb555efc82960beb044cfa1c7
parent856bb4b609ee1cac2a5c74a30c40ad82e782dabf (diff)
afs: Fix afs_kill_pages()
[ Upstream commit 7286a35e893176169b09715096a4aca557e2ccd2 ] Fix afs_kill_pages() in two ways: (1) If a writeback has been partially flushed, then if we try and kill the pages it contains, some of them may no longer be undergoing writeback and end_page_writeback() will assert. Fix this by checking to see whether the page in question is actually undergoing writeback before ending that writeback. (2) The loop that scans for pages to kill doesn't increase the first page index, and so the loop may not terminate, but it will try to process the same pages over and over again. Fix this by increasing the first page index to one after the last page we processed. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/afs/write.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c
index f9e5994e80ab..3fba2b573c86 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -299,10 +299,14 @@ static void afs_kill_pages(struct afs_vnode *vnode, bool error,
ASSERTCMP(pv.nr, ==, count);
for (loop = 0; loop < count; loop++) {
- ClearPageUptodate(pv.pages[loop]);
+ struct page *page = pv.pages[loop];
+ ClearPageUptodate(page);
if (error)
- SetPageError(pv.pages[loop]);
- end_page_writeback(pv.pages[loop]);
+ SetPageError(page);
+ if (PageWriteback(page))
+ end_page_writeback(page);
+ if (page->index >= first)
+ first = page->index + 1;
}
__pagevec_release(&pv);