Re: perf_counters issue with self-sampling threads

[stephane eranian]

Andi,

On Tue, Jul 28, 2009 at 10:56 AM, Andi Kleen<andi@xxxxxxxxxxxxxx> wrote:
> On Tue, Jul 28, 2009 at 10:51:04AM +0200, stephane eranian wrote:
>> [Reposting the message because of stupid MIME-encoding error on my part]
>> Andi,
>>
>> Looks like SIGPROF is calling _group_send_sig_info(), so I
>> think it is subject to the same problem.
>
> So sounds like a whole class of signals can't be POSIX compliant.
>

Well, the problem is that I don't where to find the POSIX spec that defines
signal types and how they should be handled in multi-threaded programs.
That would be a good starting point.

> Likely others will run into the same problem.
>
> Perhaps should define a new sigaction flag for this to make
> it all explicit.
>
That's probably a clean way of doing this.
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