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Re: [Qemu-trivial] [Qemu-devel] [PATCH v4 03/11] qemu-log: correct help

From: Alex Bennée
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH v4 03/11] qemu-log: correct help text for -d cpu
Date: Tue, 04 Aug 2015 20:08:36 +0100

Richard Henderson <address@hidden> writes:

> On 08/04/2015 10:22 AM, Alex Bennée wrote:
>> Richard Henderson <address@hidden> writes:
>>> On 08/04/2015 08:15 AM, Peter Maydell wrote:
>>>> On 4 August 2015 at 16:11, Alex Bennée <address@hidden> wrote:
>>>>> Aurelien Jarno <address@hidden> writes:
>>>>>> On 2015-08-03 10:14, Alex Bennée wrote:
>>>>>> In practice this is not true for linked TB. Should we also disable TB
>>>>>> linking when this option is enabled?
>>>>> Good question. I suspect yes because if you've gone to level of wanting
>>>>> exec tracing you'll probably get confused by the chaining. Of course it
>>>>> will run a lot slower then.
>>>> Unless the bug you were trying to track down is caused by the exec
>>>> chaining, of course... But yes, I think we get more people wanting
>>>> chaining to be disableable.
>>>> Not sure we want to tie it to the 'cpu' debug option, though -- it
>>>> applies just as much to 'exec'.
>>> Does it make more sense to have a 'nochain' debug option, and not tie it to
>>> either 'cpu' or 'exec'?  It might be occasionally useful on its own, simply 
>>> to
>>> determine if a bug does exist in the exec chaining.
>> Would that make sense as a debug option or should we have a specific set
>> of TCG options to alter its behaviour?
> That's what I'm saying -- probably a separate debug option is better.

Sorry I meant should we add it to -d (as in -d nochain) or have some tcg
opts (--tcg nochain,blah)

> r~

Alex Bennée

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