Re: [Qemu-devel] Any topics for today's MTTCG sync-up call?

[Alex Bennée]

alvise rigo <address@hidden> writes:

> Hi Alex,
>
> I finally solved the issue I had, the branch is working well as far as I
> can say.
> The work I will share, in addition to making the LL/SC work mttcg-aware,
> extends the various TLB flushes calls with the query-based mechanism: the
> requesting CPU queries the flushes to the target CPUs and wait them for
> completion.
>
> Sorry for the delay, I have been quite busy. I just need to polish some
> commits, than (this week) I will share the branch.

Thanks for the update. It sounds like we don't need to add to that on
the call.

Anyone else have something they want to discuss?

>
> Best regards,
> alvise
>
> On Mon, May 23, 2016 at 12:57 PM, Alex Bennée <address@hidden>
> wrote:
>
>> Hi,
>>
>> It's been a while since the last sync-up call. Have we got any topics to
>> discuss today?
>>
>> Sergey and I (with a little Paolo) have spent some of last week delving
>> into the locking hierarchy w.r.t to tb_lock vs mmap_lock to see if there
>> is any simplification to be had. I'm not sure if this is a topic
>> conducive to a phone call instead of the mailing list but if others want
>> to discuss it we can add it as an agenda item.
>>
>> We also have a new member of the team. Pranith has joined as a GSoC
>> student. He'll be looking at memory ordering with his first pass at the
>> problem looking to solve the store-after-load issues which do show up on
>> ARM-on-x86 (see my testcase).
>>
>> Alvise, is there any help you need with the LL/SC stuff? The MTTCG aware
>> version has been taking some time so would it be worth sharing the
>> issues you have hit with the group?
>>
>> Emilio, is there anything you want to add? I've been following the QHT
>> stuff which is a really positive addition which my v3 base patches is
>> based upon (making the hot-path non lock contended). Do you have
>> anything in the works above that?
>>
>> Cheers,
>>
>> --
>> Alex Bennée
>>


--
Alex Bennée