On Sat, Nov 29, 2014 at 3:22 PM, Andrei Mikhailovsky <andrei@xxxxxxxxxx> wrote:
> Ilya,
>
> I think i spoke too soon in my last message. I've not given it more load
> (running 8 concurrent dds with bs=4M) and about a minute or so after
> starting i've seen problems in dmesg output. I am attaching kern.log file
> for you reference.
>
> Please check starting with the following line: Nov 29 12:07:38
> arh-ibstorage1-ib kernel: [ 3831.906510]. This is when I've started the
> concurrent 8 dds.
>
> The command that caused this is:
>
> time dd if=/dev/zero of=4G00 bs=4M count=5K oflag=direct & time dd
> if=/dev/zero of=4G11 bs=4M count=5K oflag=direct &time dd if=/dev/zero
> of=4G22 bs=4M count=5K oflag=direct &time dd if=/dev/zero of=4G33 bs=4M
> count=5K oflag=direct & time dd if=/dev/zero of=4G44 bs=4M count=5K
> oflag=direct & time dd if=/dev/zero of=4G55 bs=4M count=5K oflag=direct
> &time dd if=/dev/zero of=4G66 bs=4M count=5K oflag=direct &time dd
> if=/dev/zero of=4G77 bs=4M count=5K oflag=direct &
>
> I've ran the same test about 10 times but with only 4 concurrent dds and
> that didn't cause the issue.
>
> Should I try the 3.18 kernel again to see if 8dds produce similar output?
Missing attachment.
Thanks,
Ilya
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