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authorTao Ma <boyu.mt@taobao.com>2011-10-24 16:11:30 +0200
committerJens Axboe <axboe@kernel.dk>2011-10-24 16:11:30 +0200
commit9562ad9ab36df7ccef920d119f3b5100025db95f (patch)
treeb5e32ca469cbefca4122c1a08db80cdb12e655fb /block
parente890413af4c2dfebf5432ef30cc70cb11dad3213 (diff)
downloadlinux-9562ad9ab36df7ccef920d119f3b5100025db95f.tar.gz
block: Remove the control of complete cpu from bio.
bio originally has the functionality to set the complete cpu, but it is broken. Chirstoph said that "This code is unused, and from the all the discussions lately pretty obviously broken. The only thing keeping it serves is creating more confusion and possibly more bugs." And Jens replied with "We can kill bio_set_completion_cpu(). I'm fine with leaving cpu control to the request based drivers, they are the only ones that can toggle the setting anyway". So this patch tries to remove all the work of controling complete cpu from a bio. Cc: Shaohua Li <shaohua.li@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 7e1523521c7..da697936d22 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1276,7 +1276,6 @@ out:
void init_request_from_bio(struct request *req, struct bio *bio)
{
- req->cpu = bio->bi_comp_cpu;
req->cmd_type = REQ_TYPE_FS;
req->cmd_flags |= bio->bi_rw & REQ_COMMON_MASK;
@@ -1362,8 +1361,7 @@ get_rq:
*/
init_request_from_bio(req, bio);
- if (test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags) ||
- bio_flagged(bio, BIO_CPU_AFFINE))
+ if (test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags))
req->cpu = raw_smp_processor_id();
plug = current->plug;