Re: [patch 1/2] x86_64 page fault NMI-safe

[Avi Kivity]

 On 08/15/2010 09:31 PM, Mathieu Desnoyers wrote:
> I tested it in the past, and must admit that I changed from a vmalloc-based
> implementation to page-based using software cross-page write primitives based on
> feedback from Steven and Ingo. Diminishing TLB trashing seemed like a good
> approach, and using vmalloc on 32-bit machines is a pain, because users have to
> tweak the vmalloc region size at boot. So all in all, I moved to a vmalloc-less
> implementation without much more thought.


Forgot to comment about the i386 issue - that really is a blocker if you 
absolutely need to support large trace buffers on 32-bit machines.  I 
would urge all those people to move to x86_64 and be done with it, but I 
don't know all the use cases.

It's possible to hack this to work by having a private mm_struct and 
switching to it temporarily, but it will be horribly slow.

--
error compiling committee.c: too many arguments to function

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/