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blk-mq: Use pointers for blk_mq_tags bitmap tags

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Introduce pointers for the blk_mq_tags regular and reserved bitmap tags,
with the goal of later being able to use a common shared tag bitmap across
all HW contexts in a set.

Signed-off-by: John Garry <john.garry@huawei.com>
Tested-by: Don Brace<don.brace@microsemi.com> #SCSI resv cmds patches used
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry
2020-08-19 23:20:23 +08:00
committed by Jens Axboe
parent 1c0706a70a
commit 222a5ae03c
6 changed files with 39 additions and 33 deletions
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8
block/blk-mq-debugfs.c
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@@ -452,11 +452,11 @@ static void blk_mq_debugfs_tags_show(struct seq_file *m,
atomic_read(&tags->active_queues));
seq_puts(m, "\nbitmap_tags:\n");
sbitmap_queue_show(&tags->bitmap_tags, m);
sbitmap_queue_show(tags->bitmap_tags, m);
if (tags->nr_reserved_tags) {
seq_puts(m, "\nbreserved_tags:\n");
sbitmap_queue_show(&tags->breserved_tags, m);
sbitmap_queue_show(tags->breserved_tags, m);
}
}
@@ -487,7 +487,7 @@ static int hctx_tags_bitmap_show(void *data, struct seq_file *m)
if (res)
goto out;
if (hctx->tags)
sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m);
sbitmap_bitmap_show(&hctx->tags->bitmap_tags->sb, m);
mutex_unlock(&q->sysfs_lock);
out:
@@ -521,7 +521,7 @@ static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m)
if (res)
goto out;
if (hctx->sched_tags)
sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m);
sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags->sb, m);
mutex_unlock(&q->sysfs_lock);
out: