xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

blk-mq: only allocate a single mq_map per tag_set

Browse Source 
The mapping is identical for all queues in a tag_set, so stop wasting
memory for building multiple.  Note that for now I've kept the mq_map
pointer in the request_queue, but we'll need to investigate if we can
remove it without suffering too much from the additional pointer chasing.
The same would apply to the mq_ops pointer as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2016-09-14 16:18:53 +02:00
committed by Jens Axboe
parent 4e68a01142
commit bdd17e75cd
2 changed files with 15 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/blk-mq.h
View File

@@ -67,6 +67,7 @@ struct blk_mq_hw_ctx {
};
struct blk_mq_tag_set {
unsigned int *mq_map;
struct blk_mq_ops *ops;
unsigned int nr_hw_queues;
unsigned int queue_depth; /* max hw supported */