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Subject: Re: [OMPI devel] detecting regcache_clean deadlocks in Open-MX
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-09-21 08:27:01


On Sep 21, 2009, at 5:50 AM, Brice Goglin wrote:

> I am playing with mx__regcache_clean() in Open-MX so as to have
> OpenMPI
> cleanup the Open-MX regcache when needed. It causes some deadlocks
> since
> OpenMPI intercepts Open-MX' own free() calls. Is there a "safe" way to
> have Open-MX free/munmap calls not invoke OpenMPI interception hooks?
>

Not ATM, no.

> Or
> is there a way to detect the caller of free/munmap so that my
> regcache_clean does nothing in this case? Otherwise, I guess I'll have
> to add a private malloc implementation inside Open-MX and hope OpenMPI
> won't see it.
>

Can you structure your code to not call free/munmap inside the handler?

-- 
Jeff Squyres
jsquyres_at_[hidden]