Messages in this thread Patch in this message | | | Date | Sun, 28 Apr 2013 09:00:16 +0800 | From | Shaohua Li <> | Subject | Re: hybrid raid1 with trim support [REGRESSION] |
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On Sun, Apr 28, 2013 at 08:54:46AM +0800, Shaohua Li wrote: > On Sat, Apr 27, 2013 at 06:29:49PM +0200, Markus wrote: > > Hi! > > > > Now I had the time to bisect, started with 3.7 as good and 3.8 as bad. > > 0cfbcafcae8b7364b5fa96c2b26ccde7a3a296a9 is the bad commit. [1] > > block: add plug for blkdev_issue_discard > > > > While 3.8.10 was still bad, the same kernel with the reverted patch applied is fine. > Thanks for the reporting. Does below patch work for you? Oops, there is a typo there, should be this one:
--- drivers/md/raid1.c | 7 ++++++- drivers/md/raid10.c | 7 ++++++- 2 files changed, 12 insertions(+), 2 deletions(-)
Index: linux/drivers/md/raid1.c =================================================================== --- linux.orig/drivers/md/raid1.c 2013-03-07 14:14:05.950824173 +0800 +++ linux/drivers/md/raid1.c 2013-04-28 08:57:17.874058434 +0800 @@ -981,7 +981,12 @@ static void raid1_unplug(struct blk_plug while (bio) { /* submit pending writes */ struct bio *next = bio->bi_next; bio->bi_next = NULL; - generic_make_request(bio); + if (unlikely((bio->bi_rw & REQ_DISCARD) && + !blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) + /* Just ignore it */ + bio_endio(bio, 0); + else + generic_make_request(bio); bio = next; } kfree(plug); Index: linux/drivers/md/raid10.c =================================================================== --- linux.orig/drivers/md/raid10.c 2013-03-07 14:14:05.950824173 +0800 +++ linux/drivers/md/raid10.c 2013-04-28 08:57:44.765719067 +0800 @@ -1133,7 +1133,12 @@ static void raid10_unplug(struct blk_plu while (bio) { /* submit pending writes */ struct bio *next = bio->bi_next; bio->bi_next = NULL; - generic_make_request(bio); + if (unlikely((bio->bi_rw & REQ_DISCARD) && + !blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) + /* Just ignore it */ + bio_endio(bio, 0); + else + generic_make_request(bio); bio = next; } kfree(plug);
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