| From | Luis Henriques <> | Subject | [PATCH 3.11 054/208] bcache: Fix dirty_data accounting | Date | Mon, 13 Jan 2014 15:58:15 +0000 |
| |
3.11.10.3 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Kent Overstreet <kmo@daterainc.com>
commit d24a6e1087030b6da286df9433add5fa2f21b83b upstream.
Dirty data accounting wasn't quite right - firstly, we were adding the key we're inserting after it could have merged with another dirty key already in the btree, and secondly we could sometimes pass the wrong offset to bcache_dev_sectors_dirty_add() for dirty data we were overwriting - which is important when tracking dirty data by stripe.
NOTE FOR BACKPORTERS: For 3.10 (and 3.11?) there's other accounting fixes necessary that got squashed in with other patches; the full patch against 3.10 is 408cc2f47eeac93a, available at: git://evilpiepirate.org/~kent/linux-bcache.git bcache-3.10-writeback-fixes
Signed-off-by: Kent Overstreet <kmo@daterainc.com> [ luis: backported to 3.11: - replaced usage of 'replace_key' by '&op->replace' (all the additional bits required for 3.10 are already included ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/md/bcache/btree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 9e6c9f5..230d81e 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -1673,7 +1673,8 @@ static bool fix_overlapping_extents(struct btree *b, if (KEY_START(k) > KEY_START(insert) + sectors_found) goto check_failed; - if (KEY_PTRS(&op->replace) != KEY_PTRS(k)) + if (KEY_PTRS(k) != KEY_PTRS(&op->replace) || + KEY_DIRTY(k) != KEY_DIRTY(&op->replace)) goto check_failed; /* skip past gen */ -- 1.8.3.2
|