Re: [Qemu-devel] Qemu: Guest Linux hangs on Mac OS X 10.11

[Paolo Bonzini <pbonzini@redhat.com>]

On 08/11/2015 23:55, Peter Maydell wrote:
> So the good news is that on mainline this doesn't happen any more.
> The bad news is that something weird is going on such that git
> bisect doesn't give helpful answers. Specifically if I start by
> compiling older versions and work forwards, then
>  0fd7e09 kvmclock: add a new function to update env->tsc.
> shows the bug, and
>  6388acc Revert "Introduce cpu_clean_all_dirty"
> does not. (And I've got to that commit both via a git-bisect
> and by a second round of manually trying to identify the commit,
> so it's consistent about where it changes behaviour.)
> However that makes no sense because that revert commit
> is just removing unused code. And then if I go backwards again
> to 0fd7e09 the bug doesn't repro there.

Even 0fd7e09 does not change behavior unless you use KVM (which you
obviously don't do under Mac OS X).  So if you go backwards to 0fd7e09^
it shouldn't reproduce there either.

What is the known bad SHA1?

Paolo