@@ -386,6 +386,9 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
op_is_write(bio_op(bio))))
goto skip;
+ if (bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND))
+ goto skip;
+
/* If the ioprio already exists on the bio, use that. We assume that
* the upper layer properly assigned the calling process's ioprio to
* the bio being passed to bcache. Otherwise, use current's ioc. */
@@ -81,7 +81,8 @@ static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
return true;
}
- return op_is_sync(bio->bi_opf) || in_use <= CUTOFF_WRITEBACK;
+ return op_is_sync(bio->bi_opf) || bio->bi_opf & (REQ_META|REQ_PRIO)
+ || in_use <= CUTOFF_WRITEBACK;
}
static inline void bch_writeback_queue(struct cached_dev *dc)
Bypass if: bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND) Writeback if: op_is_sync(bio->bi_opf) || bio->bi_opf & (REQ_META|REQ_PRIO) Signed-off-by: Eric Wheeler <bcache@linux.ewheeler.net> --- drivers/md/bcache/request.c | 3 +++ drivers/md/bcache/writeback.h | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-)