AuxXxilium/linux_dsm_epyc7002
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Merge tag 'md/4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

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Pull MD fixes from Shaohua Li:
 "Three small fixes for MD:

   - md-cluster fix for faulty device from Guoqing

   - writehint fix for writebehind IO for raid1 from Mariusz

   - a live lock fix for interrupted recovery from Yufen"

* tag 'md/4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  raid1: copy write hint from master bio to behind bio
  md/raid1: exit sync request if MD_RECOVERY_INTR is set
  md-cluster: don't update recovery_offset for faulty device
This commit is contained in:
Linus Torvalds 2018-04-20 10:39:44 -07:00
commit 7768ee3f45
2 changed files with 24 additions and 7 deletions
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6
drivers/md/md.c
View File

@ -9256,8 +9256,10 @@ void md_reload_sb(struct mddev *mddev, int nr)
check_sb_changes(mddev, rdev);
/* Read all rdev's to update recovery_offset */
rdev_for_each_rcu(rdev, mddev)
read_rdev(mddev, rdev);
rdev_for_each_rcu(rdev, mddev) {
if (!test_bit(Faulty, &rdev->flags))
read_rdev(mddev, rdev);
}
}
EXPORT_SYMBOL(md_reload_sb);

25
drivers/md/raid1.c
View File

@ -854,7 +854,7 @@ static void flush_pending_writes(struct r1conf *conf)
* there is no normal IO happeing. It must arrange to call
* lower_barrier when the particular background IO completes.
*/
static void raise_barrier(struct r1conf *conf, sector_t sector_nr)
static sector_t raise_barrier(struct r1conf *conf, sector_t sector_nr)
{
int idx = sector_to_idx(sector_nr);
@ -885,13 +885,23 @@ static void raise_barrier(struct r1conf *conf, sector_t sector_nr)
* max resync count which allowed on current I/O barrier bucket.
*/
wait_event_lock_irq(conf->wait_barrier,
!conf->array_frozen &&
(!conf->array_frozen &&
!atomic_read(&conf->nr_pending[idx]) &&
atomic_read(&conf->barrier[idx]) < RESYNC_DEPTH,
atomic_read(&conf->barrier[idx]) < RESYNC_DEPTH) ||
test_bit(MD_RECOVERY_INTR, &conf->mddev->recovery),
conf->resync_lock);
if (test_bit(MD_RECOVERY_INTR, &conf->mddev->recovery)) {
atomic_dec(&conf->barrier[idx]);
spin_unlock_irq(&conf->resync_lock);
wake_up(&conf->wait_barrier);
return -EINTR;
}
atomic_inc(&conf->nr_sync_pending);
spin_unlock_irq(&conf->resync_lock);
return 0;
}
static void lower_barrier(struct r1conf *conf, sector_t sector_nr)
@ -1092,6 +1102,8 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio,
goto skip_copy;
}
behind_bio->bi_write_hint = bio->bi_write_hint;
while (i < vcnt && size) {
struct page *page;
int len = min_t(int, PAGE_SIZE, size);
@ -2662,9 +2674,12 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
bitmap_cond_end_sync(mddev->bitmap, sector_nr,
mddev_is_clustered(mddev) && (sector_nr + 2 * RESYNC_SECTORS > conf->cluster_sync_high));
r1_bio = raid1_alloc_init_r1buf(conf);
raise_barrier(conf, sector_nr);
if (raise_barrier(conf, sector_nr))
return 0;
r1_bio = raid1_alloc_init_r1buf(conf);
rcu_read_lock();
/*