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authorJohn Pittman <jpittman@redhat.com>2019-05-23 23:49:39 +0200
committerJens Axboe <axboe@kernel.dk>2019-05-31 23:12:34 +0200
commit61939b12dc24d0ac958020f261046c35a16e0c48 (patch)
treea4bfb6fffe06ac6257977112e62c038d4394d285 /block/blk-core.c
parentblk-mq: Document the blk_mq_hw_queue_to_node() arguments (diff)
downloadlinux-61939b12dc24d0ac958020f261046c35a16e0c48.tar.xz
linux-61939b12dc24d0ac958020f261046c35a16e0c48.zip
block: print offending values when cloned rq limits are exceeded
While troubleshooting issues where cloned request limits have been exceeded, it is often beneficial to know the actual values that have been breached. Print these values, assisting in ease of identification of root cause of the breach. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: John Pittman <jpittman@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
-rw-r--r--block/blk-core.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index e6a273da4559..ee1b35fe8572 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1138,7 +1138,9 @@ static int blk_cloned_rq_check_limits(struct request_queue *q,
struct request *rq)
{
if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, req_op(rq))) {
- printk(KERN_ERR "%s: over max size limit.\n", __func__);
+ printk(KERN_ERR "%s: over max size limit. (%u > %u)\n",
+ __func__, blk_rq_sectors(rq),
+ blk_queue_get_max_sectors(q, req_op(rq)));
return -EIO;
}
@@ -1150,7 +1152,8 @@ static int blk_cloned_rq_check_limits(struct request_queue *q,
*/
blk_recalc_rq_segments(rq);
if (rq->nr_phys_segments > queue_max_segments(q)) {
- printk(KERN_ERR "%s: over max segments limit.\n", __func__);
+ printk(KERN_ERR "%s: over max segments limit. (%hu > %hu)\n",
+ __func__, rq->nr_phys_segments, queue_max_segments(q));
return -EIO;
}