[PATCH] Improve code in ctdb lock helper

[Amitay Isaacs]

On Fri, Dec 2, 2016 at 8:26 PM, Volker Lendecke <vl at samba.org> wrote:

> On Fri, Dec 02, 2016 at 04:19:58PM +1100, Amitay Isaacs wrote:
> > Volker, I would really appreciate if you can verify that I am doing
> testing
> > correctly.
> >
> > Usually it takes few runs to reproduce the problem.  So I run this as
> > follows:
> >
> >   # while true ; do ./bin/test_mutex_raw /tmp/foobar 10 0 ; done
>
> Thanks for that test program! It works fine on FreeBSD but stalls on
> a virtual Debian Jessie x86_64 and on a Debian testing on a Raspi2 for
> me. So it seems at least CPU architecture independent.
>
> What this program does exactly matches what I have expected from robust
> mutexes. I have been proven wrong just a few days ago by the FreeBSD
> developers, so I would not count on this too much :-)
>
> I think we need to raise this with glibc and/or kernel people to explain
> to us what we are doing wrong this time. Question is -- who can we
> ask? Do you want me to look around for appropriate mailing lists?
>

Yes. I think first we should check with glibc folks.

I would appreciate if you can report it to glibc mailing list.

Thanks.

Amitay.