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| author | Javier González <javier@cnexlabs.com> | 2017-10-13 14:46:17 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-10-13 08:34:57 -0600 |
| commit | 6ca2f71f3e3d94d188000b420ce0529b07f3ce95 (patch) | |
| tree | e99c846fd3bbbd5786e41425371584763abe0d0a /drivers/lightnvm/pblk-cache.c | |
| parent | 55e836d401601e7903b36db015ce899dc11085ab (diff) | |
| download | linux-stable-6ca2f71f3e3d94d188000b420ce0529b07f3ce95.tar.gz linux-stable-6ca2f71f3e3d94d188000b420ce0529b07f3ce95.tar.bz2 linux-stable-6ca2f71f3e3d94d188000b420ce0529b07f3ce95.zip | |
lightnvm: pblk: simplify path on REQ_PREFLUSH
On REQ_PREFLUSH, directly tag the I/O context flags to signal a flush in
the write to cache path, instead of finding the correct entry context
and imposing a memory barrier. This simplifies the code and might
potentially prevent race conditions when adding functionality to the
write path.
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 'drivers/lightnvm/pblk-cache.c')
| -rw-r--r-- | drivers/lightnvm/pblk-cache.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/lightnvm/pblk-cache.c b/drivers/lightnvm/pblk-cache.c index 1d6b8e3585f1..0d227ef7d1b9 100644 --- a/drivers/lightnvm/pblk-cache.c +++ b/drivers/lightnvm/pblk-cache.c @@ -43,8 +43,10 @@ retry: if (unlikely(!bio_has_data(bio))) goto out; - w_ctx.flags = flags; pblk_ppa_set_empty(&w_ctx.ppa); + w_ctx.flags = flags; + if (bio->bi_opf & REQ_PREFLUSH) + w_ctx.flags |= PBLK_FLUSH_ENTRY; for (i = 0; i < nr_entries; i++) { void *data = bio_data(bio); |