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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus

Browse source 
Pull the pending 4.21 changes for md from Shaohua.

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md: fix raid10 hang issue caused by barrier
  raid10: refactor common wait code from regular read/write request
  md: remvoe redundant condition check
  lib/raid6: add option to skip algo benchmarking
  lib/raid6: sort algos in rough performance order
  lib/raid6: check for assembler SSSE3 support
  lib/raid6: avoid __attribute_const__ redefinition
  lib/raid6: add missing include for raid6test
  md: remove set but not used variable 'bi_rdev'
This commit is contained in:
Jens Axboe 2019-01-03 08:21:02 -07:00
commit dc629c211c
6 changed files with 94 additions and 96 deletions
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14
drivers/md/md.c
View file

@ -2147,14 +2147,12 @@ EXPORT_SYMBOL(md_integrity_register);
*/
int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
struct blk_integrity *bi_rdev;
struct blk_integrity *bi_mddev;
char name[BDEVNAME_SIZE];
if (!mddev->gendisk)
return 0;
bi_rdev = bdev_get_integrity(rdev->bdev);
bi_mddev = blk_get_integrity(mddev->gendisk);
if (!bi_mddev) /* nothing to do */
@ -5693,14 +5691,10 @@ int md_run(struct mddev *mddev)
return 0;
abort:
if (mddev->flush_bio_pool) {
mempool_destroy(mddev->flush_bio_pool);
mddev->flush_bio_pool = NULL;
}
if (mddev->flush_pool){
mempool_destroy(mddev->flush_pool);
mddev->flush_pool = NULL;
}
mempool_destroy(mddev->flush_bio_pool);
mddev->flush_bio_pool = NULL;
mempool_destroy(mddev->flush_pool);
mddev->flush_pool = NULL;
return err;
}

76
drivers/md/raid10.c
View file

@ -1124,6 +1124,29 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
kfree(plug);
}
/*
* 1. Register the new request and wait if the reconstruction thread has put
* up a bar for new requests. Continue immediately if no resync is active
* currently.
* 2. If IO spans the reshape position. Need to wait for reshape to pass.
*/
static void regular_request_wait(struct mddev *mddev, struct r10conf *conf,
struct bio *bio, sector_t sectors)
{
wait_barrier(conf);
while (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
bio->bi_iter.bi_sector < conf->reshape_progress &&
bio->bi_iter.bi_sector + sectors > conf->reshape_progress) {
raid10_log(conf->mddev, "wait reshape");
allow_barrier(conf);
wait_event(conf->wait_barrier,
conf->reshape_progress <= bio->bi_iter.bi_sector ||
conf->reshape_progress >= bio->bi_iter.bi_sector +
sectors);
wait_barrier(conf);
}
}
static void raid10_read_request(struct mddev *mddev, struct bio *bio,
struct r10bio *r10_bio)
{
@ -1132,7 +1155,6 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
const int op = bio_op(bio);
const unsigned long do_sync = (bio->bi_opf & REQ_SYNC);
int max_sectors;
sector_t sectors;
struct md_rdev *rdev;
char b[BDEVNAME_SIZE];
int slot = r10_bio->read_slot;
@ -1166,30 +1188,8 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
}
rcu_read_unlock();
}
/*
* Register the new request and wait if the reconstruction
* thread has put up a bar for new requests.
* Continue immediately if no resync is active currently.
*/
wait_barrier(conf);
sectors = r10_bio->sectors;
while (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
bio->bi_iter.bi_sector < conf->reshape_progress &&
bio->bi_iter.bi_sector + sectors > conf->reshape_progress) {
/*
* IO spans the reshape position. Need to wait for reshape to
* pass
*/
raid10_log(conf->mddev, "wait reshape");
allow_barrier(conf);
wait_event(conf->wait_barrier,
conf->reshape_progress <= bio->bi_iter.bi_sector ||
conf->reshape_progress >= bio->bi_iter.bi_sector +
sectors);
wait_barrier(conf);
}
regular_request_wait(mddev, conf, bio, r10_bio->sectors);
rdev = read_balance(conf, r10_bio, &max_sectors);
if (!rdev) {
if (err_rdev) {
@ -1209,7 +1209,9 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
struct bio *split = bio_split(bio, max_sectors,
gfp, &conf->bio_split);
bio_chain(split, bio);
allow_barrier(conf);
generic_make_request(bio);
wait_barrier(conf);
bio = split;
r10_bio->master_bio = bio;
r10_bio->sectors = max_sectors;
@ -1332,30 +1334,8 @@ static void raid10_write_request(struct mddev *mddev, struct bio *bio,
finish_wait(&conf->wait_barrier, &w);
}
/*
* Register the new request and wait if the reconstruction
* thread has put up a bar for new requests.
* Continue immediately if no resync is active currently.
*/
wait_barrier(conf);
sectors = r10_bio->sectors;
while (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
bio->bi_iter.bi_sector < conf->reshape_progress &&
bio->bi_iter.bi_sector + sectors > conf->reshape_progress) {
/*
* IO spans the reshape position. Need to wait for reshape to
* pass
*/
raid10_log(conf->mddev, "wait reshape");
allow_barrier(conf);
wait_event(conf->wait_barrier,
conf->reshape_progress <= bio->bi_iter.bi_sector ||
conf->reshape_progress >= bio->bi_iter.bi_sector +
sectors);
wait_barrier(conf);
}
regular_request_wait(mddev, conf, bio, sectors);
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
(mddev->reshape_backwards
? (bio->bi_iter.bi_sector < conf->reshape_safe &&
@ -1514,7 +1494,9 @@ retry_write:
struct bio *split = bio_split(bio, r10_bio->sectors,
GFP_NOIO, &conf->bio_split);
bio_chain(split, bio);
allow_barrier(conf);
generic_make_request(bio);
wait_barrier(conf);
bio = split;
r10_bio->master_bio = bio;
}