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bcache: fix miss key refill->end in writeback

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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>
This commit is contained in:
Tang Junhui
2018-10-08 20:41:14 +08:00
committed by Jens Axboe
parent 7567c2a2ad
commit 2d6cb6edd2
1 changed files with 1 additions and 1 deletions
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2
drivers/md/bcache/btree.c
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@@ -2434,7 +2434,7 @@ 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;
}