AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-04 02:26:56 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

block: trace all devices plug operation

Browse Source 
In func blk_queue_bio, if list of plug is empty,it will call
blk_trace_plug.
If process deal with a single device,it't ok.But if process deal with
multi devices,it only trace the first device.
Using request_count to judge, it can soleve this problem.

In addition, i modify the comment.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jianpeng Ma 2013-09-11 13:21:07 -06:00 committed by Jens Axboe
parent 6e4664525b
commit 7aef2e780b
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block/blk-core.c
View File

@ -1549,11 +1549,9 @@ void blk_queue_bio(struct request_queue *q, struct bio *bio)
if (plug) {
/*
* 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.
* of a plug trace.
*/
if (list_empty(&plug->list))
if (!request_count)
trace_block_plug(q);
else {
if (request_count >= BLK_MAX_REQUEST_COUNT) {