4.19-stable review patch. If anyone has any objections, please let me know.
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From: Tang Junhui tang.junhui.linux@gmail.com
commit 502b291568fc7faf1ebdb2c2590f12851db0ff76 upstream.
Missed reading IOs are identified by s->cache_missed, not the s->cache_miss, so in trace_bcache_read() using trace_bcache_read to identify whether the IO is missed or not.
Signed-off-by: Tang Junhui tang.junhui.linux@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Coly Li colyli@suse.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/md/bcache/request.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -850,7 +850,7 @@ static void cached_dev_read_done_bh(stru
bch_mark_cache_accounting(s->iop.c, s->d, !s->cache_missed, s->iop.bypass); - trace_bcache_read(s->orig_bio, !s->cache_miss, s->iop.bypass); + trace_bcache_read(s->orig_bio, !s->cache_missed, s->iop.bypass);
if (s->iop.status) continue_at_nobarrier(cl, cached_dev_read_error, bcache_wq);