Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx> --- block/blk-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-core.c b/block/blk-core.c index 0a00e4e..fb970fd 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1492,7 +1492,7 @@ void blk_queue_bio(struct request_queue *q, struct bio *bio) * Check if we can merge with the plugged list before grabbing * any locks. */ - if (attempt_plug_merge(q, bio, &request_count)) + if (likely(bio_mergeable(bio)) && attempt_plug_merge(q, bio, &request_count)) return; spin_lock_irq(q->queue_lock); -- 1.8.4ÿôèº{.nÇ+?·?®??+%?Ëÿ±éݶ¥?wÿº{.nÇ+?·¥?{±þ¶¢wø§¶?¡Ü¨}©?²Æ zÚ&j:+v?¨þø¯ù®w¥þ?à2?Þ?¨èÚ&¢)ß¡«a¶Úÿÿûàz¿äz¹Þ?ú+?ù???Ý¢jÿ?wèþf