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Re: ubsan and Dejagnu not having a big enough buffer in some cases


On Wed, Jul 20, 2016 at 1:32 PM, Jeff Law <law@redhat.com> wrote:
> On 07/20/2016 02:21 PM, Segher Boessenkool wrote:
>>
>> On Wed, Jul 20, 2016 at 12:48:09PM +0530, Senthil Kumar Selvaraj wrote:
>>>>
>>>> I see this for some of the larger C frontend tests with lots of expected
>>>> errors/warnings as well.
>>
>>
>> I also see this for tests with small output, but it happens more
>> often for tests with big output.
>>
>>> Are you guys getting this everytime or is it sporadic?
>>
>>
>> Not always, but usually.  It seems related to how busy the system is,
>> but that could be my imagination.
>>
>> It usually happens for a bunch of tests at the same time.
>>
>> Not always is the output just cut short: some random characters
>> are inserted sometimes (in the individual log files, the consolidated
>> log file does not have those; it looks like pointers).
>
> Hmm, there was a kernel bug a while back which had similar behavior. What
> kernel version are you running?

I am running with 4.2.  Let me find the old email and see I should
include it in our tree (I thought we did).

Thanks,
Andrew

>
> jeff


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