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authorColy Li <colyli@suse.de>2018-01-08 12:21:29 -0800
committerJens Axboe <axboe@kernel.dk>2018-01-08 13:29:00 -0700
commit5138ac6748e381501894976f995fb7d1a63f80f4 (patch)
tree93140799f86e8b7536083f1722734491baba7c01 /drivers/md/bcache
parent2831231d4c3f999d2d062b23dfbc8b0faa4bc6e0 (diff)
bcache: fix misleading error message in bch_count_io_errors()
Bcache only does recoverable I/O for read operations by calling cached_dev_read_error(). For write opertions there is no I/O recovery for failed requests. But in bch_count_io_errors() no matter read or write I/Os, before errors counter reaches io error limit, pr_err() always prints "IO error on %, recoverying". For write requests this information is misleading, because there is no I/O recovery at all. This patch adds a parameter 'is_read' to bch_count_io_errors(), and only prints "recovering" by pr_err() when the bio direction is READ. Signed-off-by: Coly Li <colyli@suse.de> Reviewed-by: Michael Lyle <mlyle@lyle.org> Reviewed-by: Tang Junhui <tang.junhui@zte.com.cn> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/bcache')
-rw-r--r--drivers/md/bcache/bcache.h2
-rw-r--r--drivers/md/bcache/io.c13
-rw-r--r--drivers/md/bcache/super.c4
-rw-r--r--drivers/md/bcache/writeback.c4
4 files changed, 16 insertions, 7 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 9117da5f494b..5e2d4e80198e 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -862,7 +862,7 @@ static inline void wake_up_allocators(struct cache_set *c)
/* Forward declarations */
-void bch_count_io_errors(struct cache *, blk_status_t, const char *);
+void bch_count_io_errors(struct cache *, blk_status_t, int, const char *);
void bch_bbio_count_io_errors(struct cache_set *, struct bio *,
blk_status_t, const char *);
void bch_bbio_endio(struct cache_set *, struct bio *, blk_status_t,
diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index fac97ec2d0e2..a783c5a41ff1 100644
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -51,7 +51,10 @@ void bch_submit_bbio(struct bio *bio, struct cache_set *c,
/* IO errors */
-void bch_count_io_errors(struct cache *ca, blk_status_t error, const char *m)
+void bch_count_io_errors(struct cache *ca,
+ blk_status_t error,
+ int is_read,
+ const char *m)
{
/*
* The halflife of an error is:
@@ -94,8 +97,9 @@ void bch_count_io_errors(struct cache *ca, blk_status_t error, const char *m)
errors >>= IO_ERROR_SHIFT;
if (errors < ca->set->error_limit)
- pr_err("%s: IO error on %s, recovering",
- bdevname(ca->bdev, buf), m);
+ pr_err("%s: IO error on %s%s",
+ bdevname(ca->bdev, buf), m,
+ is_read ? ", recovering." : ".");
else
bch_cache_set_error(ca->set,
"%s: too many IO errors %s",
@@ -108,6 +112,7 @@ void bch_bbio_count_io_errors(struct cache_set *c, struct bio *bio,
{
struct bbio *b = container_of(bio, struct bbio, bio);
struct cache *ca = PTR_CACHE(c, &b->key, 0);
+ int is_read = (bio_data_dir(bio) == READ ? 1 : 0);
unsigned threshold = op_is_write(bio_op(bio))
? c->congested_write_threshold_us
@@ -129,7 +134,7 @@ void bch_bbio_count_io_errors(struct cache_set *c, struct bio *bio,
atomic_inc(&c->congested);
}
- bch_count_io_errors(ca, error, m);
+ bch_count_io_errors(ca, error, is_read, m);
}
void bch_bbio_endio(struct cache_set *c, struct bio *bio,
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index d13e4ccb30a0..133b81225ea9 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -274,7 +274,9 @@ static void write_super_endio(struct bio *bio)
{
struct cache *ca = bio->bi_private;
- bch_count_io_errors(ca, bio->bi_status, "writing superblock");
+ /* is_read = 0 */
+ bch_count_io_errors(ca, bio->bi_status, 0,
+ "writing superblock");
closure_put(&ca->set->sb_write);
}
diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index f82ffb2e9b9b..31b0a292a619 100644
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -244,8 +244,10 @@ static void read_dirty_endio(struct bio *bio)
struct keybuf_key *w = bio->bi_private;
struct dirty_io *io = w->private;
+ /* is_read = 1 */
bch_count_io_errors(PTR_CACHE(io->dc->disk.c, &w->key, 0),
- bio->bi_status, "reading dirty data from cache");
+ bio->bi_status, 1,
+ "reading dirty data from cache");
dirty_endio(bio);
}