From: Omar Sandoval <[email protected]> These can be used to debug issues like tag leaks and stuck requests.
Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Omar Sandoval <[email protected]> --- block/blk-mq-debugfs.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 9f811007cf4f..9b87b15619f1 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -197,6 +197,30 @@ static const struct file_operations hctx_tags_fops = { .release = single_release, }; +static int hctx_tags_bitmap_show(struct seq_file *m, void *v) +{ + struct blk_mq_hw_ctx *hctx = m->private; + struct request_queue *q = hctx->queue; + + mutex_lock(&q->sysfs_lock); + if (hctx->tags) + sbitmap_bitmap_show(&hctx->tags->bitmap_tags.sb, m); + mutex_unlock(&q->sysfs_lock); + return 0; +} + +static int hctx_tags_bitmap_open(struct inode *inode, struct file *file) +{ + return single_open(file, hctx_tags_bitmap_show, inode->i_private); +} + +static const struct file_operations hctx_tags_bitmap_fops = { + .open = hctx_tags_bitmap_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static int hctx_sched_tags_show(struct seq_file *m, void *v) { struct blk_mq_hw_ctx *hctx = m->private; @@ -222,6 +246,30 @@ static const struct file_operations hctx_sched_tags_fops = { .release = single_release, }; +static int hctx_sched_tags_bitmap_show(struct seq_file *m, void *v) +{ + struct blk_mq_hw_ctx *hctx = m->private; + struct request_queue *q = hctx->queue; + + mutex_lock(&q->sysfs_lock); + if (hctx->sched_tags) + sbitmap_bitmap_show(&hctx->sched_tags->bitmap_tags.sb, m); + mutex_unlock(&q->sysfs_lock); + return 0; +} + +static int hctx_sched_tags_bitmap_open(struct inode *inode, struct file *file) +{ + return single_open(file, hctx_sched_tags_bitmap_show, inode->i_private); +} + +static const struct file_operations hctx_sched_tags_bitmap_fops = { + .open = hctx_sched_tags_bitmap_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos) { struct blk_mq_ctx *ctx = m->private; @@ -269,7 +317,9 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { {"dispatch", 0400, &hctx_dispatch_fops}, {"ctx_map", 0400, &hctx_ctx_map_fops}, {"tags", 0400, &hctx_tags_fops}, + {"tags_bitmap", 0400, &hctx_tags_bitmap_fops}, {"sched_tags", 0400, &hctx_sched_tags_fops}, + {"sched_tags_bitmap", 0400, &hctx_sched_tags_bitmap_fops}, }; static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
