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| author | Mikulas Patocka <mpatocka@redhat.com> | 2020-06-19 18:51:34 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-07-01 06:17:19 +0300 |
| commit | 6cd52ae3868b677052ef749a424a7d9ecdc2db08 (patch) | |
| tree | 5f66ecb9458bb55e0d07051d8b7e2827dce0fa1e /drivers/md | |
| parent | a33e2d0aa4e265ae5ea06778516b863b17a7c737 (diff) | |
| download | linux-6cd52ae3868b677052ef749a424a7d9ecdc2db08.tar.xz | |
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>
Diffstat (limited to 'drivers/md')
| -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 509552fc55fc..cc028353f9d5 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -281,6 +281,8 @@ 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); |