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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-03-30 11:21:27 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-10 16:13:33 -0600 |
| commit | f5c0b0910ac4c1bc93474d7593cc73622fdfc822 (patch) | |
| tree | c6849ea632dafd3474bdc845b0b92129cf1c1a68 /block/blk-mq-debugfs.c | |
| parent | 91d68905aee08a79b9ba82676c834fc670d722a0 (diff) | |
| download | lwn-f5c0b0910ac4c1bc93474d7593cc73622fdfc822.tar.gz lwn-f5c0b0910ac4c1bc93474d7593cc73622fdfc822.zip | |
blk-mq: Show symbolic names for hctx state and flags
Instead of showing the hctx state and flags as numbers, show the
names of the flags.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-debugfs.c')
| -rw-r--r-- | block/blk-mq-debugfs.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index b25c76a0cbbc..df9b688b877c 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -182,11 +182,19 @@ static const struct file_operations queue_poll_stat_fops = { .release = single_release, }; +static const char *const hctx_state_name[] = { + [BLK_MQ_S_STOPPED] = "STOPPED", + [BLK_MQ_S_TAG_ACTIVE] = "TAG_ACTIVE", + [BLK_MQ_S_SCHED_RESTART] = "SCHED_RESTART", + [BLK_MQ_S_TAG_WAITING] = "TAG_WAITING", + +}; static int hctx_state_show(struct seq_file *m, void *v) { struct blk_mq_hw_ctx *hctx = m->private; - seq_printf(m, "0x%lx\n", hctx->state); + blk_flags_show(m, hctx->state, hctx_state_name, + ARRAY_SIZE(hctx_state_name)); return 0; } @@ -202,11 +210,34 @@ static const struct file_operations hctx_state_fops = { .release = single_release, }; +static const char *const alloc_policy_name[] = { + [BLK_TAG_ALLOC_FIFO] = "fifo", + [BLK_TAG_ALLOC_RR] = "rr", +}; + +static const char *const hctx_flag_name[] = { + [ilog2(BLK_MQ_F_SHOULD_MERGE)] = "SHOULD_MERGE", + [ilog2(BLK_MQ_F_TAG_SHARED)] = "TAG_SHARED", + [ilog2(BLK_MQ_F_SG_MERGE)] = "SG_MERGE", + [ilog2(BLK_MQ_F_BLOCKING)] = "BLOCKING", + [ilog2(BLK_MQ_F_NO_SCHED)] = "NO_SCHED", +}; + static int hctx_flags_show(struct seq_file *m, void *v) { struct blk_mq_hw_ctx *hctx = m->private; - - seq_printf(m, "0x%lx\n", hctx->flags); + const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); + + seq_puts(m, "alloc_policy="); + if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && + alloc_policy_name[alloc_policy]) + seq_puts(m, alloc_policy_name[alloc_policy]); + else + seq_printf(m, "%d", alloc_policy); + seq_puts(m, " "); + blk_flags_show(m, + hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), + hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); return 0; } |