I did a "mkfs" on a "md" of 3 8-disk "md"s (24 disk md). So no
lock contention, and only one "dev" to match, right? [Try to
avoid the problem.]
getblk was holding the lru_list_lock lock 86% of the time.
Was averaging about 25,000 blocks/sec to the disks (vmstat),
but it was often 200,000 over 2 seconds, then 5 seconds idle,
etc. Disk lights didn't come on much (but they all blinked
nicely in sync).
I'll try your patch out and run individual disks again.
Kevin
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Aug 23 2001 - 21:00:59 EST