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authorStephen Bates <sbates@raithlin.com>2017-04-21 00:59:11 +0200
committerJens Axboe <axboe@fb.com>2017-04-21 01:10:48 +0200
commit0206319fdfee7c36b97aa6c0561bab206132f813 (patch)
treeb7338a78b1162079ed46003cadb5206d7672e235 /block/blk-mq-debugfs.c
parentblk-mq: fix schedule-while-atomic with scheduler attached (diff)
downloadlinux-0206319fdfee7c36b97aa6c0561bab206132f813.tar.xz
linux-0206319fdfee7c36b97aa6c0561bab206132f813.zip
blk-mq: Fix poll_stat for new size-based bucketing.
Fixes an issue where the size of the poll_stat array in request_queue does not match the size expected by the new size based bucketing for IO completion polling. Fixes: 720b8ccc4500 ("blk-mq: Add a polling specific stats function") Signed-off-by: Stephen Bates <sbates@raithlin.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-debugfs.c')
-rw-r--r--block/blk-mq-debugfs.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index df9b688b877c..3057641d5d15 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -159,14 +159,17 @@ static void print_stat(struct seq_file *m, struct blk_rq_stat *stat)
static int queue_poll_stat_show(struct seq_file *m, void *v)
{
struct request_queue *q = m->private;
+ int bucket;
- seq_puts(m, "read: ");
- print_stat(m, &q->poll_stat[READ]);
- seq_puts(m, "\n");
+ for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) {
+ seq_printf(m, "read (%d Bytes): ", 1 << (9+bucket));
+ print_stat(m, &q->poll_stat[2*bucket]);
+ seq_puts(m, "\n");
- seq_puts(m, "write: ");
- print_stat(m, &q->poll_stat[WRITE]);
- seq_puts(m, "\n");
+ seq_printf(m, "write (%d Bytes): ", 1 << (9+bucket));
+ print_stat(m, &q->poll_stat[2*bucket+1]);
+ seq_puts(m, "\n");
+ }
return 0;
}