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authorJan Kara <jack@suse.com>2015-10-17 22:35:09 -0400
committerTheodore Ts'o <tytso@mit.edu>2015-10-17 22:35:09 -0400
commit33d14975e5ac469963d5d63856b61698ad0bff07 (patch)
treefaa2e7fab1cc1284ab2bc8537464707d5a61c4c1 /fs/jbd2/checkpoint.c
parent9c02ac97989d544c89f049e8add7149aaea01671 (diff)
downloadblackbird-op-linux-33d14975e5ac469963d5d63856b61698ad0bff07.tar.gz
blackbird-op-linux-33d14975e5ac469963d5d63856b61698ad0bff07.zip
jbd2: fix checkpoint list cleanup
Unlike comments and expectation of callers journal_clean_one_cp_list() returned 1 not only if it freed the transaction but also if it freed some buffers in the transaction. That could make __jbd2_journal_clean_checkpoint_list() skip processing t_checkpoint_io_list and continue with processing the next transaction. This is mostly a cosmetic issue since the only result is we can sometimes free less memory than we could. But it's still worth fixing. Fix journal_clean_one_cp_list() to return 1 only if the transaction was really freed. Fixes: 50849db32a9f529235a84bcc84a6b8e631b1d0ec Signed-off-by: Jan Kara <jack@suse.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/jbd2/checkpoint.c')
-rw-r--r--fs/jbd2/checkpoint.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 8c44654ce274..684996c8a3a4 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -427,7 +427,6 @@ static int journal_clean_one_cp_list(struct journal_head *jh, bool destroy)
struct journal_head *last_jh;
struct journal_head *next_jh = jh;
int ret;
- int freed = 0;
if (!jh)
return 0;
@@ -441,10 +440,9 @@ static int journal_clean_one_cp_list(struct journal_head *jh, bool destroy)
else
ret = __jbd2_journal_remove_checkpoint(jh) + 1;
if (!ret)
- return freed;
+ return 0;
if (ret == 2)
return 1;
- freed = 1;
/*
* This function only frees up some memory
* if possible so we dont have an obligation
@@ -452,10 +450,10 @@ static int journal_clean_one_cp_list(struct journal_head *jh, bool destroy)
* requested:
*/
if (need_resched())
- return freed;
+ return 0;
} while (jh != last_jh);
- return freed;
+ return 0;
}
/*
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