On Wed, 2017-03-08 at 15:17 -0800, Jeff Hammond wrote:

On Wed, Mar 8, 2017 at 2:25 PM, Latham, Robert J. <[email protected]> wrote:

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On Wed, 2017-03-08 at 09:25 +0000, Giuseppe Congiu wrote:

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Hello Rob,  

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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