diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2020-06-19 11:51:34 -0400 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-30 15:36:31 -0400 |
| commit | edb930b4eaa735d31d8b7b7d2497b9c51e451d5f (patch) | |
| tree | b1703415c7bc7967771e8c45b33128cc18123e47 | |
| parent | 22551da148c98636fe91b66b8dba3a1d1e1e46cc (diff) | |
dm writecache: add cond_resched to loop in persistent_memory_claim()
commit d35bd764e6899a7bea71958f08d16cea5bfa1919 upstream.
Add cond_resched() to a loop that fills in the mapper memory area
because the loop can be executed many times.
Fixes: 48debafe4f2fe ("dm: add writecache target")
Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/dm-writecache.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index 856b3515654ff..5cc94f57421ca 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -286,6 +286,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) while (daa-- && i < p) { pages[i++] = pfn_t_to_page(pfn); pfn.val++; + if (!(i & 15)) + cond_resched(); } } while (i < p); wc->memory_map = vmap(pages, p, VM_MAP, PAGE_KERNEL); |