Where is the __per_cpu_offset array initialized??

Where is the __per_cpu_offset array initialized??

[=?gb18030?B?wuS62w==?=]

Hi list,
Does anyone can tell me where the array __per_cpu_offset is initialized on x86_64 arch, 
I remembered it was initialized in function setup_per_cpu_areas,
but it seems that it is not the case on x86-64 arch.


Thanks,
Larry
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Where is the __per_cpu_offset array initialized??

[Laurent Navet]

Hi Larry,

> Does anyone can tell me where the array __per_cpu_offset is initialized on
> x86_64 arch,
> I remembered it was initialized in function setup_per_cpu_areas,
> but it seems that it is not the case on x86-64 arch.

It seems your memory is right and code is shared with x86.
https://elixir.bootlin.com/linux/latest/source/arch/x86/kernel/setup_percpu.c#L29

Laurent.
-- 
? On ne r?sout pas un probl?me avec les modes de pens?e qui l?ont engendr?. ?
? You cannot solve a problem with the same thinking that created it. ?

Where is the __per_cpu_offset array initialized??

[落痕]

Hi Laurent,


Thanks for your help.
But I'm still not sure how it is implemented.
I'll continue to do some research on the issue, and post my answer if I can.


Thanks
Larry




------------------ Original ------------------
From:  "Laurent Navet"<laurent.navet@gmail.com>;
Date:  Sat, Mar 10, 2018 09:45 PM
To:  "??"<losemyheaven@foxmail.com>;
Cc:  "kernelnewbies"<kernelnewbies@kernelnewbies.org>; 
Subject:  Re: Where is the __per_cpu_offset array initialized??



Hi Larry,

> Does anyone can tell me where the array __per_cpu_offset is initialized on
> x86_64 arch,
> I remembered it was initialized in function setup_per_cpu_areas,
> but it seems that it is not the case on x86-64 arch.

It seems your memory is right and code is shared with x86.
https://elixir.bootlin.com/linux/latest/source/arch/x86/kernel/setup_percpu.c#L29

Laurent.
-- 
? On ne r?sout pas un probl?me avec les modes de pens?e qui l?ont engendr?. ?
? You cannot solve a problem with the same thinking that created it. ?
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