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-rw-r--r--block/blk-merge.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index d59074556703..51c84540d3bb 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -117,17 +117,11 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
* each holds at most BIO_MAX_PAGES bvecs because
* bio_clone() can fail to allocate big bvecs.
*
- * It should have been better to apply the limit per
- * request queue in which bio_clone() is involved,
- * instead of globally. The biggest blocker is the
- * bio_clone() in bio bounce.
+ * Those drivers which will need to use bio_clone()
+ * should tell us in some way. For now, impose the
+ * BIO_MAX_PAGES limit on all queues.
*
- * If bio is splitted by this reason, we should have
- * allowed to continue bios merging, but don't do
- * that now for making the change simple.
- *
- * TODO: deal with bio bounce's bio_clone() gracefully
- * and convert the global limit into per-queue limit.
+ * TODO: handle users of bio_clone() differently.
*/
if (bvecs++ >= BIO_MAX_PAGES)
goto split;