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for-linus-20180929

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Merge tag 'for-linus-20180929' of git://git.kernel.dk/linux-block

Jens writes:
  "Block fixes for 4.19-rc6

   A set of fixes that should go into this release. This pull request
   contains:

   - A fix (hopefully) for the persistent grants for xen-blkfront. A
     previous fix from this series wasn't complete, hence reverted, and
     this one should hopefully be it. (Boris Ostrovsky)

   - Fix for an elevator drain warning with SMR devices, which is
     triggered when you switch schedulers (Damien)

   - bcache deadlock fix (Guoju Fang)

   - Fix for the block unplug tracepoint, which has had the
     timer/explicit flag reverted since 4.11 (Ilya)

   - Fix a regression in this series where the blk-mq timeout hook is
     invoked with the RCU read lock held, hence preventing it from
     blocking (Keith)

   - NVMe pull from Christoph, with a single multipath fix (Susobhan Dey)"

* tag 'for-linus-20180929' of git://git.kernel.dk/linux-block:
  xen/blkfront: correct purging of persistent grants
  Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
  blk-mq: I/O and timer unplugs are inverted in blktrace
  bcache: add separate workqueue for journal_write to avoid deadlock
  xen/blkfront: When purging persistent grants, keep them in the buffer
  block: fix deadline elevator drain for zoned block devices
  blk-mq: Allow blocking queue tag iter callbacks
  nvme: properly propagate errors in nvme_mpath_init
This commit is contained in:
Greg Kroah-Hartman 2018-09-29 14:52:14 -07:00
commit 291d0e5d81
8 changed files with 25 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/md/bcache/bcache.h
View file

@ -965,6 +965,7 @@ void bch_prio_write(struct cache *ca);
void bch_write_bdev_super(struct cached_dev *dc, struct closure *parent);
extern struct workqueue_struct *bcache_wq;
extern struct workqueue_struct *bch_journal_wq;
extern struct mutex bch_register_lock;
extern struct list_head bch_cache_sets;

6
drivers/md/bcache/journal.c
View file

@ -485,7 +485,7 @@ static void do_journal_discard(struct cache *ca)
closure_get(&ca->set->cl);
INIT_WORK(&ja->discard_work, journal_discard_work);
schedule_work(&ja->discard_work);
queue_work(bch_journal_wq, &ja->discard_work);
}
}
@ -592,7 +592,7 @@ static void journal_write_done(struct closure *cl)
: &j->w[0];
__closure_wake_up(&w->wait);
continue_at_nobarrier(cl, journal_write, system_wq);
continue_at_nobarrier(cl, journal_write, bch_journal_wq);
}
static void journal_write_unlock(struct closure *cl)
@ -627,7 +627,7 @@ static void journal_write_unlocked(struct closure *cl)
spin_unlock(&c->journal.lock);
btree_flush_write(c);
continue_at(cl, journal_write, system_wq);
continue_at(cl, journal_write, bch_journal_wq);
return;
}

8
drivers/md/bcache/super.c
View file

@ -47,6 +47,7 @@ static int bcache_major;
static DEFINE_IDA(bcache_device_idx);
static wait_queue_head_t unregister_wait;
struct workqueue_struct *bcache_wq;
struct workqueue_struct *bch_journal_wq;
#define BTREE_MAX_PAGES (256 * 1024 / PAGE_SIZE)
/* limitation of partitions number on single bcache device */
@ -2341,6 +2342,9 @@ static void bcache_exit(void)
kobject_put(bcache_kobj);
if (bcache_wq)
destroy_workqueue(bcache_wq);
if (bch_journal_wq)
destroy_workqueue(bch_journal_wq);
if (bcache_major)
unregister_blkdev(bcache_major, "bcache");
unregister_reboot_notifier(&reboot);
@ -2370,6 +2374,10 @@ static int __init bcache_init(void)
if (!bcache_wq)
goto err;
bch_journal_wq = alloc_workqueue("bch_journal", WQ_MEM_RECLAIM, 0);
if (!bch_journal_wq)
goto err;
bcache_kobj = kobject_create_and_add("bcache", fs_kobj);
if (!bcache_kobj)
goto err;