Patch "afs: Fix waiting for writeback then skipping folio" has been added to the 6.3-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    afs: Fix waiting for writeback then skipping folio

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     afs-fix-waiting-for-writeback-then-skipping-folio.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From 819da022dd007398d0c42ebcd8dbb1b681acea53 Mon Sep 17 00:00:00 2001
From: "Vishal Moola (Oracle)" <vishal.moola at gmail.com>
Date: Wed, 7 Jun 2023 13:41:20 -0700
Subject: afs: Fix waiting for writeback then skipping folio

From: Vishal Moola (Oracle) <vishal.moola at gmail.com>

commit 819da022dd007398d0c42ebcd8dbb1b681acea53 upstream.

Commit acc8d8588cb7 converted afs_writepages_region() to write back a
folio batch. The function waits for writeback to a folio, but then
proceeds to the rest of the batch without trying to write that folio
again. This patch fixes has it attempt to write the folio again.

[DH: Also remove an 'else' that adding a goto makes redundant]

Fixes: acc8d8588cb7 ("afs: convert afs_writepages_region() to use filemap_get_folios_tag()")
Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
Signed-off-by: David Howells <dhowells at redhat.com>
cc: Marc Dionne <marc.dionne at auristor.com>
cc: linux-afs at lists.infradead.org
Link: https://lore.kernel.org/r/20230607204120.89416-2-vishal.moola@gmail.com/
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 fs/afs/write.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/afs/write.c b/fs/afs/write.c
index fd433024070e..8750b99c3f56 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -731,6 +731,7 @@ static int afs_writepages_region(struct address_space *mapping,
 			 * (changing page->mapping to NULL), or even swizzled
 			 * back from swapper_space to tmpfs file mapping
 			 */
+try_again:
 			if (wbc->sync_mode != WB_SYNC_NONE) {
 				ret = folio_lock_killable(folio);
 				if (ret < 0) {
@@ -757,9 +758,10 @@ static int afs_writepages_region(struct address_space *mapping,
 #ifdef CONFIG_AFS_FSCACHE
 					folio_wait_fscache(folio);
 #endif
-				} else {
-					start += folio_size(folio);
+					goto try_again;
 				}
+
+				start += folio_size(folio);
 				if (wbc->sync_mode == WB_SYNC_NONE) {
 					if (skips >= 5 || need_resched()) {
 						*_next = start;
-- 
2.41.0



Patches currently in stable-queue which might be from vishal.moola at gmail.com are

queue-6.3/afs-fix-dangling-folio-ref-counts-in-writeback.patch
queue-6.3/afs-fix-waiting-for-writeback-then-skipping-folio.patch