path: root/block/blk-mq-tag.h
diff options
authorKeith Busch <>2015-06-01 09:29:53 -0600
committerJens Axboe <>2015-06-01 14:35:56 -0600
commitf26cdc8536ad50fb802a0445f836b4f94ca09ae7 (patch)
tree8863e8e297fd10241d7ff1e24cdef4ab0b7c625e /block/blk-mq-tag.h
parente548ca4ee4595f65b262661d166310ad8a149bec (diff)
blk-mq: Shared tag enhancements
Storage controllers may expose multiple block devices that share hardware resources managed by blk-mq. This patch enhances the shared tags so a low-level driver can access the shared resources not tied to the unshared h/w contexts. This way the LLD can dynamically add and delete disks and request queues without having to track all the request_queue hctx's to iterate outstanding tags. Signed-off-by: Keith Busch <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'block/blk-mq-tag.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 90767b370308..75893a34237d 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -44,6 +44,7 @@ struct blk_mq_tags {
struct list_head page_list;
int alloc_policy;
+ cpumask_var_t cpumask;