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Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG

From: Peter Maydell
Subject: Re: [Qemu-devel] [RFC v2 08/11] tcg: add options for enabling MTTCG
Date: Tue, 12 Apr 2016 12:59:11 +0100

On 12 April 2016 at 12:48, Alex Bennée <address@hidden> wrote:
> Sergey Fedorov <address@hidden> writes:
>> Maybe we'd better use existing qemu accelerator framework and introduce
>> "-machine accel=mttcg" option?
> My worry would be breaking existing code which assumes kvm | tcg. We
> will want to enable mttcg by default for combos that work without having
> to tweak tooling that already uses the -machine options.

Comments from the peanut gallery:
 * We definitely want to just default to MTTCG where it works:
users shouldn't have to add new command line switches to get the
better performance etc, because in practice that won't happen
 * Anything that adds a new command line option at all has to
be supported practically forever, so options that are only
useful for a transitional period are worth thinking twice about

-- PMM

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