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bcache: fix miss key refill->end in writeback

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commit 2d6cb6edd2c7fb4f40998895bda45006281b1ac5 upstream.

refill->end record the last key of writeback, for example, at the first
time, keys (1,128K) to (1,1024K) are flush to the backend device, but
the end key (1,1024K) is not included, since the bellow code:
	if (bkey_cmp(k, refill->end) >= 0) {
		ret = MAP_DONE;
		goto out;
	}
And in the next time when we refill writeback keybuf again, we searched
key start from (1,1024K), and got a key bigger than it, so the key
(1,1024K) missed.
This patch modify the above code, and let the end key to be included to
the writeback key buffer.

Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tang Junhui 2018-10-08 20:41:14 +08:00 • committed by Greg Kroah-Hartman
parent 7a4269707d
commit 9b359dd99c
1 changed files with 1 additions and 1 deletions
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2
drivers/md/bcache/btree.c
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@ -2372,7 +2372,7 @@ static int refill_keybuf_fn(struct btree_op *op, struct btree *b,
struct keybuf *buf = refill->buf;
int ret = MAP_CONTINUE;
if (bkey_cmp(k, refill->end) >= 0) {
if (bkey_cmp(k, refill->end) > 0) {
ret = MAP_DONE;
goto out;
}