[mpich-devel] Deadlock when using MPIX_Grequest interface

[Latham, Robert J.]

On Wed, 2017-03-08 at 15:17 -0800, Jeff Hammond wrote:
> 
> 
> On Wed, Mar 8, 2017 at 2:25 PM, Latham, Robert J. <robl at mcs.anl.gov>
> wrote:
> > On Wed, 2017-03-08 at 09:25 +0000, Giuseppe Congiu wrote:
> > > Hello Rob,
> > >  
> > > > I'm excited to see someone using the MPIX_Grequest interface. 
> > We
> > > > used
> > > > the MPIX_Grequest interface to implement non-blocking
> > collective
> > > > I/O,
> > > > and had some bad interactions between libc's aio and the
> > grequest
> > > > callbacks.  I don't know if you are running into something
> > similar.
> > >
> > > Maybe. Do you have a description of the problem somewhere?
> > 
> > The guy who did that work just left last Friday.  I'll have to dig
> > up
> > the archives. Looks like it was a hard-to-debug segfault  https://t
> > rac.
> > mpich.org/projects/mpich/ticket/2201
> > 
> 
> That link is 404.  Not sure if temporary or permanent.

Huh. Did it word-wrap in a strange way?

https://trac.mpich.org/projects/mpich/ticket/2201

==rob