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Re: [tip:x86/asm] x86/asm: Optimize clear_page()

From Yinghai Lu <yinghai@kernel.org>
Newsgroups linux.kernel
Subject Re: [tip:x86/asm] x86/asm: Optimize clear_page()
Date 2017-03-07 21:10 +0100
Message-ID <titAJ-46W-1@gated-at.bofh.it> (permalink)
References <tb5MR-7Et-1@gated-at.bofh.it> <tg9d9-1fv-47@gated-at.bofh.it> <tigau-2NF-9@gated-at.bofh.it> <tip46-X4-27@gated-at.bofh.it>
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On Mon, Mar 6, 2017 at 11:30 PM, Ingo Molnar <mingo@kernel.org> wrote:
>
> * Yinghai Lu <yinghai@kernel.org> wrote:
>
>> On Wed, Mar 1, 2017 at 1:47 AM, tip-bot for Borislav Petkov
>> <tipbot@zytor.com> wrote:
>> > Commit-ID:  49ca7bb328c630dd43be626534b49e19513296fd
>> > Gitweb:     http://git.kernel.org/tip/49ca7bb328c630dd43be626534b49e19513296fd
>> > Author:     Borislav Petkov <bp@suse.de>
>> > AuthorDate: Thu, 9 Feb 2017 01:34:49 +0100
>> > Committer:  Ingo Molnar <mingo@kernel.org>
>> > CommitDate: Wed, 1 Mar 2017 10:18:32 +0100
>> >
>> > x86/asm: Optimize clear_page()
>> >
>> > Currently, we CALL clear_page() which then JMPs to the proper function
>> > chosen by the alternatives.
>> >
>> > What we should do instead is CALL the proper function directly. (This
>> > was something Ingo suggested a while ago). So let's do that.
>>
>> looks like this one broke the kexec.
>> after revert it back, kexec work again.
>
> Ok, this should be fixed in the new version I just pushed out:
>
>   f25d38475519 x86/asm: Optimize clear_page()
>
> Please let me know if it doesn't.

Yes. new commit works with kexec.

Thanks

Yinghai

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Thread

[tip:x86/asm] x86/asm: Optimize clear_page() tip-bot for Borislav Petkov <tipbot@zytor.com> - 2017-03-01 11:00 +0100
  Re: [tip:x86/asm] x86/asm: Optimize clear_page() Yinghai Lu <yinghai@kernel.org> - 2017-03-07 06:50 +0100
    Re: [tip:x86/asm] x86/asm: Optimize clear_page() Ingo Molnar <mingo@kernel.org> - 2017-03-07 16:20 +0100
      Re: [tip:x86/asm] x86/asm: Optimize clear_page() Yinghai Lu <yinghai@kernel.org> - 2017-03-07 21:10 +0100
        Re: [tip:x86/asm] x86/asm: Optimize clear_page() Ingo Molnar <mingo@kernel.org> - 2017-03-08 13:00 +0100

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