diff options
| -rw-r--r-- | drivers/md/dm-bufio.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index bef8c6eb5bdb..799915220e6c 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -815,6 +815,10 @@ static struct dm_buffer *__get_unclaimed_buffer(struct dm_bufio_client *c) BUG_ON(test_bit(B_WRITING, &b->state)); BUG_ON(test_bit(B_DIRTY, &b->state)); + if (static_branch_unlikely(&no_sleep_enabled) && c->no_sleep && + unlikely(test_bit(B_READING, &b->state))) + continue; + if (!b->hold_count) { __make_buffer_clean(b); __unlink_buffer(b); @@ -823,6 +827,9 @@ static struct dm_buffer *__get_unclaimed_buffer(struct dm_bufio_client *c) cond_resched(); } + if (static_branch_unlikely(&no_sleep_enabled) && c->no_sleep) + return NULL; + list_for_each_entry_reverse(b, &c->lru[LIST_DIRTY], lru_list) { BUG_ON(test_bit(B_READING, &b->state)); @@ -1632,7 +1639,8 @@ static void drop_buffers(struct dm_bufio_client *c) */ static bool __try_evict_buffer(struct dm_buffer *b, gfp_t gfp) { - if (!(gfp & __GFP_FS)) { + if (!(gfp & __GFP_FS) || + (static_branch_unlikely(&no_sleep_enabled) && b->c->no_sleep)) { if (test_bit(B_READING, &b->state) || test_bit(B_WRITING, &b->state) || test_bit(B_DIRTY, &b->state)) |