lightnvm: pblk: do not use a mempool for line bitmaps

pblk holds two sector bitmaps: one to keep track of the mapped sectors
while the line is active and another one to keep track of the invalid
sectors. The latter is kept during the whole live of the line, until it
is recycled. Since we cannot guarantee forward progress for the mempool
in this case, get rid of the mempool and simply allocate memory through
kmalloc.

Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index c73b17bca06b..26c2b8345149 100644
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -411,8 +411,6 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
         if (emeta->mem >= lm->emeta_len[0]) {
                 spin_lock(&l_mg->close_lock);
                 list_del(&meta_line->list);
-                WARN(!bitmap_full(meta_line->map_bitmap, lm->sec_per_line),
-                                "pblk: corrupt meta line %d\n", meta_line->id);
                 spin_unlock(&l_mg->close_lock);
         }
 
@@ -456,7 +454,7 @@ retry:
                 return 0;
         }
         meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list);
-        if (bitmap_full(meta_line->map_bitmap, lm->sec_per_line))
+        if (meta_line->emeta->mem >= lm->emeta_len[0])
                 goto retry;
         spin_unlock(&l_mg->close_lock);