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| author | Javier González <javier@cnexlabs.com> | 2017-10-13 14:46:23 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-10-13 16:34:57 +0200 |
| commit | 7bd4d370db6090004a06deb526f0f01fa99a3f9f (patch) | |
| tree | 01cbfeca78132835d73f56f1a42c5aeb0731b287 /drivers/lightnvm/pblk.h | |
| parent | lightnvm: pblk: check lba sanity on read path (diff) | |
| download | linux-7bd4d370db6090004a06deb526f0f01fa99a3f9f.tar.xz linux-7bd4d370db6090004a06deb526f0f01fa99a3f9f.zip | |
lightnvm: pblk: guarantee line integrity on reads
When a line is recycled during garbage collection, reads can still be
issued to the line. If the line is freed in the middle of this process,
data corruption might occur.
This patch guarantees that lines are not freed in the middle of reads
that target them (lines). Specifically, we use the existing line
reference to decide when a line is eligible for being freed after the
recycle process.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 4a51e6d4d036..e4704373398b 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -636,6 +636,7 @@ struct pblk { struct workqueue_struct *close_wq; struct workqueue_struct *bb_wq; + struct workqueue_struct *r_end_wq; struct timer_list wtimer; @@ -741,6 +742,7 @@ int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, void *emeta_buf); int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); void pblk_line_put(struct kref *ref); +void pblk_line_put_wq(struct kref *ref); struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |