lkml.org 
[lkml]   [2022]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] blk-mq: add debugfs to print information for blk_mq_tag_set
From
Date
friendly ping ...

在 2022/04/01 11:53, Yu Kuai 写道:
> This should be helpful to solve some problems.
>
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
> ---
> block/blk-mq-debugfs.c | 54 ++++++++++++++++++++++++++++++++++++++----
> 1 file changed, 50 insertions(+), 4 deletions(-)
>
> diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
> index aa0349e9f083..3c6260df7a95 100644
> --- a/block/blk-mq-debugfs.c
> +++ b/block/blk-mq-debugfs.c
> @@ -183,12 +183,52 @@ static ssize_t queue_state_write(void *data, const char __user *buf,
> return count;
> }
>
> +static void __flags_show(unsigned long flags, struct seq_file *m);
> +
> +static int queue_tag_set_show(void *data, struct seq_file *m)
> +{
> + struct request_queue *q = data;
> + struct blk_mq_tag_set *set = q->tag_set;
> + int i, j;
> +
> + seq_puts(m, "map:\n");
> + for (i = 0; i < set->nr_maps; ++i) {
> + struct blk_mq_queue_map *map = &set->map[i];
> +
> + if (!map) {
> + seq_puts(m, " NULL\n");
> + continue;
> + }
> +
> + seq_printf(m, " nr_queues %u offset %u map:", map->nr_queues,
> + map->queue_offset);
> + if (!map->mq_map) {
> + seq_puts(m, " NULL\n");
> + continue;
> + }
> + for (j = 0; j < nr_cpu_ids; ++j)
> + seq_printf(m, " %u", map->mq_map[j]);
> + seq_puts(m, "\n");
> + }
> +
> + seq_printf(m, "nr_hw_queues: %u\n", set->nr_hw_queues);
> + seq_printf(m, "queue_depth: %u\n", set->queue_depth);
> + seq_printf(m, "reserved_tags: %u\n", set->reserved_tags);
> + seq_printf(m, "cmd_size: %u\n", set->cmd_size);
> + seq_printf(m, "numa_node: %d\n", set->numa_node);
> + seq_printf(m, "timeout: %u\n", set->timeout);
> + __flags_show(set->flags, m);
> +
> + return 0;
> +}
> +
> static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
> { "poll_stat", 0400, queue_poll_stat_show },
> { "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
> { "pm_only", 0600, queue_pm_only_show, NULL },
> { "state", 0600, queue_state_show, queue_state_write },
> { "zone_wlock", 0400, queue_zone_wlock_show, NULL },
> + { "tag_set", 0400, queue_tag_set_show, NULL },
> { },
> };
>
> @@ -229,10 +269,9 @@ static const char *const hctx_flag_name[] = {
> };
> #undef HCTX_FLAG_NAME
>
> -static int hctx_flags_show(void *data, struct seq_file *m)
> +static void __flags_show(unsigned long flags, struct seq_file *m)
> {
> - struct blk_mq_hw_ctx *hctx = data;
> - const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags);
> + const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(flags);
>
> seq_puts(m, "alloc_policy=");
> if (alloc_policy < ARRAY_SIZE(alloc_policy_name) &&
> @@ -242,9 +281,16 @@ static int hctx_flags_show(void *data, struct seq_file *m)
> seq_printf(m, "%d", alloc_policy);
> seq_puts(m, " ");
> blk_flags_show(m,
> - hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy),
> + flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy),
> hctx_flag_name, ARRAY_SIZE(hctx_flag_name));
> seq_puts(m, "\n");
> +}
> +
> +static int hctx_flags_show(void *data, struct seq_file *m)
> +{
> + struct blk_mq_hw_ctx *hctx = data;
> +
> + __flags_show(hctx->flags, m);
> return 0;
> }
>
>

\
 
 \ /
  Last update: 2022-04-08 08:54    [W:0.035 / U:0.312 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site