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Subject: Re: [OMPI devel] Memory hooks stuff
From: Gleb Natapov (glebn_at_[hidden])
Date: 2008-05-26 04:55:05


On Sun, May 25, 2008 at 10:54:23AM -0400, Patrick Geoffray wrote:
> Jeff Squyres wrote:
> > That would also be great. I don't know anything about these mmu
> > notifiers (I'm not much of a kernel guy), but anything that allows us
>
> It's what Quadrics used for years in True64. Instead of trying to catch
> at user-level all instances when the page table of a process is modified
> (free, munmap, sbrk, etc...), the kernel notifies you when that happens.
Not just that but also when swapping out or pagefault happens so even no
page pinning is needed. But HW should be designed to work with changing
page mappings and I am not sure that Mellanox HW designed for that. What
about Myricom HW?

--
			Gleb.