Re: RHEL7 hang (and probably mainline) while copying big files because of subrequests merging(?)

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On Mon, Jul 11, 2016 at 4:52 PM, Weston Andros Adamson <dros@xxxxxxxxxx> wrote:
>
>> On Jul 11, 2016, at 9:47 AM, Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:
>>
>> On Mon, Jul 11, 2016 at 4:28 PM, Trond Myklebust
>> <trondmy@xxxxxxxxxxxxxxx> wrote:
>>>
>>>> On Jul 11, 2016, at 08:59, Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:
>>>>
>>>> We have a customer who was able to reliably reproduce the following hang:
>>>> (hang itself is rare but there are many machines, so it is not rare)
>>>>
>>>> INFO: task ascp:66692 blocked for more than 120 seconds.
>>>
>>> Why is this being reported here and not to Red Hat? Is the bug reproducible on the upstream kernel?
>>
>> It is not a report per se, more heads up for other folks like CentOS
>> and other rebuilders.
>> I checked every NFS commit since 3.10, there seems to be nothing fixing it.
>> As for testing mainline, I don't know, maybe we can arrange that.
>>
>>   Alexey
>>
>
> How have you checked every commit since 3.10 and not tested "mainline"?
>
> I don't get how both can be true. Do you mean you manually inspected each
> commit? I'm not sure the fix would be so obvious...

I've looked at commits. If the bug was fixed accidentally, then sorry
for the noise.
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