On Sat, Nov 29, 2014 at 3:49 PM, Ilya Dryomov <ilya.dryomov@xxxxxxxxxxx> wrote:
> 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.
Definitely try the 3.18 testing kernel.
Thanks,
Ilya
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