bcache: use pr_info() to inform duplicated CACHE_SET_IO_DISABLE set

It is possible that multiple I/O requests hits on failed cache device or
backing device, therefore it is quite common that CACHE_SET_IO_DISABLE is
set already when a task tries to set the bit from bch_cache_set_error().
Currently the message "CACHE_SET_IO_DISABLE already set" is printed by
pr_warn(), which might mislead users to think a serious fault happens in
source code.

This patch uses pr_info() to print the information in such situation,
avoid extra worries. This information is helpful to understand bcache
behavior in cache device failures, so I still keep them in source code.

Fixes: 771f393e8ffc9 ("bcache: add CACHE_SET_IO_DISABLE to struct cache_set flags")
Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index cedbb41533c2f027e064b2369e38d7edd323b023..3dea06b41d431c021af60320b9f71f9b4e706990 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1412,7 +1412,7 @@ bool bch_cache_set_error(struct cache_set *c, const char *fmt, ...)
                return false;
 
        if (test_and_set_bit(CACHE_SET_IO_DISABLE, &c->flags))
-               pr_warn("CACHE_SET_IO_DISABLE already set");
+               pr_info("CACHE_SET_IO_DISABLE already set");
 
        /* XXX: we can be called from atomic context
        acquire_console_sem();