Re: [PATCH][RFC] Come up with -flive-patching master option.

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On 11/9/18 6:43 PM, Qing Zhao wrote:
> Hi, Martin,
> 
> thanks a lot for the previous two new options for live-patching. 
> 
> 
> I have two more questions below:

Hello.

> 
> 1. do we still need new options to disable the following:
>    A. unreachable code/variable removal? 

I hope it's guarded with newly added option -fipa-reference-addressable. Correct me
if I'm wrong.

>    B. Visibility changes with -flto and/or -fwhole-program?

The options are not used in linux kernel, thus I didn't consider.

> 
> 2. for this new patch, could you please explain a little bit more on the problem?

We want to enable a single option that will disable all possible (and future) optimizations
that influence live patching.

Martin

> 
> Thanks.
> 
> Qing
> 
>> On Nov 9, 2018, at 9:33 AM, Martin Liška <mliska@xxxxxxx> wrote:
>>
>> Hi.
>>
>> After I added 2 new options, I would like to include a new master option.
>> It's minimal version which only disables optimizations that we are aware of
>> and can potentially cause problems for live-patching.
>>
>> Martin
>> <0001-Come-up-with-fvectorized-functions.patch>
> 




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