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Re: [Qemu-devel] [PATCH 0/2] exec: alternative fix for master abort woes
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH 0/2] exec: alternative fix for master abort woes |
Date: |
Thu, 7 Nov 2013 18:47:05 +0200 |
On Thu, Nov 07, 2013 at 05:29:15PM +0100, Paolo Bonzini wrote:
> Il 07/11/2013 17:21, Michael S. Tsirkin ha scritto:
> >> > This fixes the problems with the misalignment of the master abort region.
> >> > See patch 2 for details, patch 1 is just a preparatory search-and-replace
> >> > patch.
> >> >
> >> > Paolo Bonzini (2):
> >> > split definitions for exec.c and translate-all.c radix trees
> >> > exec: make address spaces 64-bit wide
> > Can you please share info on testing you did?
> >
>
> "make check", booting a RHEL guest with both KVM and TCG, Luiz's gdb
> crash. I also ran vmexit.flat from kvm-unit-tests and checked that
> there was no measurable slowdown.
>
> Paolo
That's on kvm with 52 bit address.
But where I would be concerned is systems with e.g. 36 bit address
space where we are doubling the cost of the lookup.
E.g. try i386 and not x86_64.
--
But