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Commit 0fb662e2 authored by Jens Axboe's avatar Jens Axboe
Browse files

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



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: default avatarJens Axboe <axboe@fb.com>
parents 61789765 cdef54dd

block/blk-mq-cpu.c

+5 −0
Original line number Diff line number Diff line 
/*

 * CPU notifier helper code for blk-mq

 *

 * Copyright (C) 2013-2014 Jens Axboe

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

block/blk-mq-cpumap.c

+5 −0
Original line number Diff line number Diff line 
/*

 * CPU <-> hardware queue mapping helpers

 *

 * Copyright (C) 2013-2014 Jens Axboe

 */

#include <linux/kernel.h>

#include <linux/threads.h>

#include <linux/module.h>

block/blk-mq-tag.c

+12 −0
Original line number Diff line number Diff line 
/*

 * Fast and scalable bitmap tagging variant. Uses sparser bitmaps spread

 * over multiple cachelines to avoid ping-pong between multiple submitters

 * or submitter and completer. Uses rolling wakeups to avoid falling of

 * the scaling cliff when we run out of tags and have to start putting

 * submitters to sleep.

 *

 * Uses active queue tracking to support fairer distribution of tags

 * between multiple submitters when a shared tag map is used.

 *

 * Copyright (C) 2013-2014 Jens Axboe

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/random.h>

block/blk-mq.c

+11 −21
Original line number Diff line number Diff line 
/*

 * Block multiqueue core code

 *

 * Copyright (C) 2013-2014 Jens Axboe

 * Copyright (C) 2013-2014 Christoph Hellwig

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/backing-dev.h>
@@ -1329,21 +1335,6 @@ struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q, const int cpu) 
}

EXPORT_SYMBOL(blk_mq_map_queue);



struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *set,

						   unsigned int hctx_index,

						   int node)

{

	return kzalloc_node(sizeof(struct blk_mq_hw_ctx), GFP_KERNEL, node);

}

EXPORT_SYMBOL(blk_mq_alloc_single_hw_queue);



void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *hctx,

				 unsigned int hctx_index)

{

	kfree(hctx);

}

EXPORT_SYMBOL(blk_mq_free_single_hw_queue);



static void blk_mq_free_rq_map(struct blk_mq_tag_set *set,

		struct blk_mq_tags *tags, unsigned int hctx_idx)

{
@@ -1584,7 +1575,7 @@ static void blk_mq_free_hw_queues(struct request_queue *q, 


	queue_for_each_hw_ctx(q, hctx, i) {

		free_cpumask_var(hctx->cpumask);

		set->ops->free_hctx(hctx, i);

		kfree(hctx);

	}

}
@@ -1805,7 +1796,8 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) 
	for (i = 0; i < set->nr_hw_queues; i++) {

		int node = blk_mq_hw_queue_to_node(map, i);



		hctxs[i] = set->ops->alloc_hctx(set, i, node);

		hctxs[i] = kzalloc_node(sizeof(struct blk_mq_hw_ctx),

					GFP_KERNEL, node);

		if (!hctxs[i])

			goto err_hctxs;
@@ -1892,7 +1884,7 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) 
		if (!hctxs[i])

			break;

		free_cpumask_var(hctxs[i]->cpumask);

		set->ops->free_hctx(hctxs[i], i);

		kfree(hctxs[i]);

	}

err_map:

	kfree(hctxs);
@@ -1977,9 +1969,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set) 
	if (set->queue_depth < set->reserved_tags + BLK_MQ_TAG_MIN)

		return -EINVAL;



	if (!set->nr_hw_queues ||

	    !set->ops->queue_rq || !set->ops->map_queue ||

	    !set->ops->alloc_hctx || !set->ops->free_hctx)

	if (!set->nr_hw_queues || !set->ops->queue_rq || !set->ops->map_queue)

		return -EINVAL;

drivers/block/mtip32xx/mtip32xx.c

+0 −2
Original line number Diff line number Diff line
@@ -3832,8 +3832,6 @@ static int mtip_init_cmd(void *data, struct request *rq, unsigned int hctx_idx, 
static struct blk_mq_ops mtip_mq_ops = {

	.queue_rq	= mtip_queue_rq,

	.map_queue	= blk_mq_map_queue,

	.alloc_hctx	= blk_mq_alloc_single_hw_queue,

	.free_hctx	= blk_mq_free_single_hw_queue,

	.init_request	= mtip_init_cmd,

	.exit_request	= mtip_free_cmd,

};