>
http://bugzilla.kernel.org/show_bug.cgi?id=14830
>
>
>
>
>
> --- Comment #3 from Michael Godfrey <godfrey@isl.stanford.edu> 2010-01-18 23:58:09 ---
>
>> This problem prevents production use of systems using this kernel.
>>
>
>
>> evokes a question: Do you have a kernel which behaved better for you? Which
>> one?
>>
>
> Yes. RHEL5.4 does not show this problem. It is the production
> system that works in this environment.
>
> The response above is disappointing. Is sync response of 20 minutes,
> including several task timeouts to be considered "normal?"
>
>
>> If you think the time is inappropriately long, we can have a look at it
>> but for that we'd need much more details like amount and nature of data writen
>> (many small files vs a few large ones), time it takes sync to complete, speed
>> of disks for sequential IO...
>>
>
> I am sorry to have to tell you that in this environment we do not
> deal in exclusively small or large files, we actually have quite a
> few of both. When an rsync which transfers about 50GB of files of
> various sizes is running, the hung condition is continuous until the rsync
> completes. This is just a pretty typical load. You could try it
> yourself. No special sizes of files are required. I think I
> mentioned that the ext4 LVM is a RAID 50 3ware 9650SE-8LPML,
> with 8 2T drives. Its throughput for reading and writing is good
> when the system is not locked up.
>
>
