]> git.openfabrics.org - ~shefty/rdma-dev.git/commit
vfs: cache request_queue in struct block_device
authorAndi Kleen <ak@linux.intel.com>
Fri, 13 Jan 2012 01:20:34 +0000 (17:20 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 13 Jan 2012 04:13:12 +0000 (20:13 -0800)
commit87192a2a49c475cf322cb143e0fa63b0102d8567
tree70acf2fb1e4a9a3a62559ad9218278d2fb114599
parentae55e1aaa7e2e57e538cb98cf617f511c5dc4f73
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>
fs/block_dev.c
include/linux/fs.h