diff options
| -rw-r--r-- | block/blk-core.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 76850fc9cf2..52e756c526b 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1311,7 +1311,15 @@ get_rq: plug = current->plug; if (plug) { - if (!plug->should_sort && !list_empty(&plug->list)) { + /* + * If this is the first request added after a plug, fire + * of a plug trace. If others have been added before, check + * if we have multiple devices in this plug. If so, make a + * note to sort the list before dispatch. + */ + if (list_empty(&plug->list)) + trace_block_plug(q); + else if (!plug->should_sort) { struct request *__rq; __rq = list_entry_rq(plug->list.prev); |