Displaying 2 results from an estimated 2 matches for "nr_wait".
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2016 Jun 13
1
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
...static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
return sync_blocks;
}
+ /*
+ * If there is non-resync activity waiting for a turn,
+ * then let it though before starting on this new sync request.
+ */
+ if (conf->nr_waiting)
+ schedule_timeout_uninterruptible(1);
+
/* we are incrementing sector_nr below. To be safe, we check against
* sector_nr + two times RESYNC_SECTORS
*/
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index e3fd725..8a4791e 100644
--- a/drivers/md/r...
2016 Jun 01
2
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
Kelly Lesperance wrote:
> I did some additional testing - I stopped Kafka on the host, and kicked
> off a disk check, and it ran at the expected speed overnight. I started
> kafka this morning, and the raid check's speed immediately dropped down to
> ~2000K/Sec.
>
> I then enabled the write-back cache on the drives (hdparm -W1 /dev/sd*).
> The raid check is now running