diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2020-06-19 11:51:34 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-06-19 12:32:24 -0400 |
| commit | d35bd764e6899a7bea71958f08d16cea5bfa1919 (patch) | |
| tree | deffd0ce137febc8e079fca0efaea8660c108ac1 /drivers/md/dm-writecache.c | |
| parent | f2cd9a5e85dc25e10f6318bc6fbcb7dcff262561 (diff) | |
dm writecache: add cond_resched to loop in persistent_memory_claim()
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>
Diffstat (limited to 'drivers/md/dm-writecache.c')
| -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 6b28990b1d84..30505d70f423 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -282,6 +282,8 @@ 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); |