diff options
| author | Andi Kleen <ak@linux.intel.com> | 2012-01-12 17:20:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-12 20:13:12 -0800 |
| commit | 87192a2a49c475cf322cb143e0fa63b0102d8567 (patch) | |
| tree | 70acf2fb1e4a9a3a62559ad9218278d2fb114599 /include | |
| parent | ae55e1aaa7e2e57e538cb98cf617f511c5dc4f73 (diff) | |
vfs: cache request_queue in struct block_device
This makes it possible to get from the inode to the request_queue with one
less cache miss. Used in followon optimization.
The livetime of the pointer is the same as the gendisk.
This assumes that the queue will always stay the same in the gendisk while
it's visible to block_devices. I think that's safe correct?
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index e694bd4434a..4bc8169fb5a 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -660,6 +660,7 @@ struct address_space { * must be enforced here for CRIS, to let the least significant bit * of struct page's "mapping" pointer be used for PAGE_MAPPING_ANON. */ +struct request_queue; struct block_device { dev_t bd_dev; /* not a kdev_t - it's a search key */ @@ -682,6 +683,7 @@ struct block_device { unsigned bd_part_count; int bd_invalidated; struct gendisk * bd_disk; + struct request_queue * bd_queue; struct list_head bd_list; /* * Private data. You must have bd_claim'ed the block_device |