On 02/27/2013 12:48 AM, John Baldwin wrote:
On Tuesday, February 26, 2013 1:31:44 pm rihad wrote:
On 28/10/2011 04:14, Jan Mikkelsen wrote:
/ Hi,
/>/
/>/ There is a patch linked to from this PR, which seems very similar:
/>/
/>/ http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/140416
/>/
/>/ http://lists.freebsd.org/pipermail/freebsd-scsi/2011-
March/004839.html
/>/
/>/ The problem is also consistent with running mfiutil clearing the
problem.
/>/
/>/ I'm about to deploy mfi controllers in a similar configuration, so
I'd be very curious about whether the patch fixes the problem for you.
/>/
/This looks promising, I'll give a try when I get a moment.
Hi,
Did the patch help? We're having the same issues & running "mfiutil show
volumes" every minute doesn't make the freezes go away.
Will this small patch be ok on 8.2-RELEASE-p4? Thanks.
You can use the patch on 8.2.
Thanks, I was forced to apply the patch to 8.2-p4 and rebuild the kernel
yesterday in the night, as it sometimes locks up both interfaces in
periods of high disk/net activity (around 4-5 gbit/s passing through).
Has anyone had full system lock-ups besides the i/o stall & mfi timeout
errors? I hope those issues are related. In such cases sometimes one of
the interfaces lives, sometimes both are down. Happened 2-3 times during
a little over a month.
Now about this part taken from here
http://lists.freebsd.org/pipermail/freebsd-scsi/2011-March/004839.html
> By issuing a dummy read operation (thus forcing a flush of data
buffers), this issue is largely averted.
Does this mean that battery-backed cache (BBU) is effectively rendered
useless, as all write operations are forced on to the disk platters on
every interrupt?
# mfiutil show adapter
mfi0 Adapter:
Product Name: Integrated Intel(R) RAID Controller SROMBSASMP2
Serial Number:
Firmware: 8.0.1-0033
RAID Levels: JBOD, RAID0, RAID1, RAID5, RAID6, RAID10, RAID50
Battery Backup: present
NVRAM: 32K
Onboard Memory: 512M
Minimum Stripe: 8K
Maximum Stripe: 1M
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