linux/drivers/block/null_blk.c, branch v3.16

null_blk: fix softirq completions for queue_mode == 1

2014-06-16T17:40:25Z

Only blk-mq completions have payload attached to the request, for request_fn mode we have stored it in req->special. This fixes an oops with queue_mode=1 and softirq completions. Signed-off-by: Jens Axboe

null_blk: fix name and description of 'queue_mode' module parameter

2014-06-11T21:34:44Z

'use_mq' is not the name of the module parameter, 'queue_mode' is. Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe

Merge branch 'for-3.16/core' into for-3.16/drivers

2014-05-28T16:18:51Z

Pull in core changes (again), since we got rid of the alloc/free hctx mq_ops hooks and mtip32xx then needed updating again. Signed-off-by: Jens Axboe

blk-mq: remove alloc_hctx and free_hctx methods

2014-05-28T16:18:31Z

There is no need for drivers to control hardware context allocation now that we do the context to node mapping in common code. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

Merge branch 'for-3.16/core' into for-3.16/drivers

2014-05-28T15:50:26Z

mtip32xx uses blk_mq_alloc_reserved_request(), so pull in the core changes so we have a properly merged end result. Signed-off-by: Jens Axboe

blk-mq: pass in suggested NUMA node to ->alloc_hctx()

2014-05-27T18:06:53Z

Drivers currently have to figure this out on their own, and they are missing information to do it properly. The ones that did attempt to do it, do it wrong. So just pass in the suggested node directly to the alloc function. Signed-off-by: Jens Axboe

block: null_blk: fix use after free

2014-05-01T15:17:41Z

entry(cmd->ll_list) may belong to new request once end_cmd() returns, so fix the bug with the patch. Without the change, it is easy to observe oops when doing null_blk(timer) test. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

blk-mq: split out tag initialization, support shared tags

2014-04-15T20:18:02Z

Add a new blk_mq_tag_set structure that gets set up before we initialize the queue. A single blk_mq_tag_set structure can be shared by multiple queues. Signed-off-by: Christoph Hellwig Modular export of blk_mq_{alloc,free}_tagset added by me. Signed-off-by: Jens Axboe

blk-mq: do not initialize req->special

2014-04-15T20:03:02Z

Drivers can reach their private data easily using the blk_mq_rq_to_pdu helper and don't need req->special. By not initializing it code can be simplified nicely, and we also shave off a few more instructions from the I/O path. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

null_blk: use blk_complete_request and blk_mq_complete_request

2014-02-10T16:27:31Z

Use the block layer helpers for CPU-local completions instead of reimplementing them locally. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe