Re: Restartable Sequences system call merged into Linux

[Florian Weimer]

On 06/14/2018 02:27 PM, Pavel Machek wrote:

> > > Should we treat it the same way?  Always allocate it for each new thread
> > > and register it with the kernel?
> >
> > That would be an efficient way to do it, indeed. There is very little
> > performance overhead to have rseq registered for all threads, whether or
> > not they intend to run rseq critical sections.
>
> People with slow / low memory machines would prefer not to see
> overhead they don't need...

I can try to get rid of the >500 byte per-thread area for the stub 
resolver.  That should compensate for the overhead introduced.

Thanks,
Florian