From patchwork Wed Dec 19 22:52:39 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [2/2] dm-crypt: never use write same Date: Wed, 19 Dec 2012 12:52:39 -0000 From: Joseph Salisbury X-Patchwork-Id: 207537 Message-Id: To: kernel-team@lists.ubuntu.com From: Joseph Salisbury BugLink: http://bugs.launchpad.net/bugs/1089818 Signed-off-by: Milan Broz Signed-off-by: Joseph Salisbury --- drivers/md/dm-crypt.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index bbf459b..60f5461 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1844,6 +1844,12 @@ static int crypt_iterate_devices(struct dm_target *ti, return fn(ti, cc->dev, cc->start, ti->len, data); } +static void crypt_io_hints(struct dm_target *ti, + struct queue_limits *limits) +{ + limits->max_write_same_sectors = 0; +} + static struct target_type crypt_target = { .name = "crypt", .version = {1, 11, 0}, @@ -1858,6 +1864,7 @@ static struct target_type crypt_target = { .message = crypt_message, .merge = crypt_merge, .iterate_devices = crypt_iterate_devices, + .io_hints = crypt_io_hints, }; static int __init dm_crypt_init(void)