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authorJavier González <jg@lightnvm.io>2017-04-22 01:32:49 +0200
committerJens Axboe <axboe@fb.com>2017-04-24 00:57:52 +0200
commita44f53faf4674d84cba79f7ee574584e18ab8744 (patch)
tree92183bdbb213a0b9604bbb387bc4749c091919cc /drivers/lightnvm/pblk-map.c
parentlightnvm: pblk: free metadata on line alloc failure (diff)
downloadlinux-a44f53faf4674d84cba79f7ee574584e18ab8744.tar.xz
linux-a44f53faf4674d84cba79f7ee574584e18ab8744.zip
lightnvm: pblk: fix erase counters on error fail
When block erases fail, these blocks are marked bad. The number of valid blocks in the line was not updated, which could cause an infinite loop on the erase path. Fix this atomic counter and, in order to avoid taking an irq lock on the interrupt context, make the erase counters atomic too. Also, in the case that a significant number of blocks become bad in a line, the result is the double shared metadata buffer (emeta) to stop the pipeline until all metadata is flushed to the media. Increase the number of metadata lines from 2 to 4 to avoid this case. Fixes: a4bd217b4326 "lightnvm: physical block device (pblk) target" Signed-off-by: Javier González <javier@cnexlabs.com> Reviewed-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm/pblk-map.c')
-rw-r--r--drivers/lightnvm/pblk-map.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c
index 3f8bab4c4d5c..17c16955284d 100644
--- a/drivers/lightnvm/pblk-map.c
+++ b/drivers/lightnvm/pblk-map.c
@@ -110,7 +110,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
continue;
set_bit(erase_lun, e_line->erase_bitmap);
- e_line->left_eblks--;
+ atomic_dec(&e_line->left_eblks);
*erase_ppa = rqd->ppa_list[i];
erase_ppa->g.blk = e_line->id;
@@ -129,7 +129,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
return;
set_bit(i, e_line->erase_bitmap);
- e_line->left_eblks--;
+ atomic_dec(&e_line->left_eblks);
*erase_ppa = pblk->luns[i].bppa; /* set ch and lun */
erase_ppa->g.blk = e_line->id;
}