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

[Peter Maydell]

On 9 November 2015 at 09:10, Paolo Bonzini <address@hidden> wrote:
>
>
> 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?

2b5a79f is definitely bad even rebuilt from clean. I'm going
to do a re-bisect building each step from clean this morning.

thanks
-- PMM