Re: [PATCH] epoll: restrict EPOLLEXCLUSIVE to POLLIN and POLLOUT

[Madars Vitolins]

Andrew Morton @ 2016-02-05 00:59 rakstÄja:
> On Thu, 04 Feb 2016 23:44:05 +0200 Madars Vitolins <m@xxxxxxxxxxx> 
> wrote:
>
> > Hi Jason,
> >
> >
> > Just run off the original tests with this patch (eventpoll.c from
> > 4.5-rc2 + patch bellow). Got the same good results, no regression.
> >
> > $ time ./bankcl
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 1359856158.04 USD
> > Account balance is: 101528948.40 USD
> >
> > real	0m41.826s
> > user	0m29.513s
> > sys	0m6.490s
> >
> >
> > Test case:
> > https://mvitolin.wordpress.com/2015/12/05/endurox-testing-epollexclusive-flag/
> >
> > PS,
> >
> > Original cases 0m24.953s vs 0m41.826s now probably is related with my 
> > pc
> > setup. As I just now re-run test with original patch, got the same ~41
> > sec.
> >
> > So I am fine with this patch!
>
> Thanks, I shall add your Tested-by:
>
> One thing we're sorely missing is an epoll test suite, in
> tools/testing/selftests.  If anyone has anything which we can use to
> kick things off, please hand it over ;)

Not bad idea, probably we need a "tools/testing/selftests/eventpoll" 
folder under which we should have test cases for various epoll scenarios 
with common "run.sh". In spare time I can try to build a case for 
EXCLUSIVE flag (with queues & multiple processes :) ).

Thanks,
Madars