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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache into for-5.18/drivers 

Pull bcache updates from Coly:

"We have 2 patches for Linux v5.18, both of them are from Mingzhe Zou.
 The first patch improves bcache initialization speed by avoid
 unnecessary cost of cache consistency, the second one fixes a potential
 NULL pointer deference in bcache initialization time."

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/colyli/linux-bcache:
  bcache: fixup multiple threads crash
  bcache: fixup bcache_dev_sectors_dirty_add() multithreaded CPU false sharing
This commit is contained in:
Jens Axboe 2022-03-06 08:13:09 -07:00
parent 13d4ef0f66 887554ab96
commit a76370690c
2 changed files with 15 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/md/bcache/btree.c
View File

@ -2060,9 +2060,11 @@ int bch_btree_check(struct cache_set *c)
}
}
/*
* Must wait for all threads to stop.
*/
wait_event_interruptible(check_state->wait,
atomic_read(&check_state->started) == 0 ||
test_bit(CACHE_SET_IO_DISABLE, &c->flags));
atomic_read(&check_state->started) == 0);
for (i = 0; i < check_state->total_threads; i++) {
if (check_state->infos[i].result) {

17
drivers/md/bcache/writeback.c
View File

@ -585,10 +585,13 @@ void bcache_dev_sectors_dirty_add(struct cache_set *c, unsigned int inode,
sectors_dirty = atomic_add_return(s,
d->stripe_sectors_dirty + stripe);
if (sectors_dirty == d->stripe_size)
set_bit(stripe, d->full_dirty_stripes);
else
clear_bit(stripe, d->full_dirty_stripes);
if (sectors_dirty == d->stripe_size) {
if (!test_bit(stripe, d->full_dirty_stripes))
set_bit(stripe, d->full_dirty_stripes);
} else {
if (test_bit(stripe, d->full_dirty_stripes))
clear_bit(stripe, d->full_dirty_stripes);
}
nr_sectors -= s;
stripe_offset = 0;
@ -998,9 +1001,11 @@ void bch_sectors_dirty_init(struct bcache_device *d)
}
}
/*
* Must wait for all threads to stop.
*/
wait_event_interruptible(state->wait,
atomic_read(&state->started) == 0 ||
test_bit(CACHE_SET_IO_DISABLE, &c->flags));
atomic_read(&state->started) == 0);
out:
kfree(state);