Re: [PATCH v4 03/16] x86/alternatives: Disable LASS when patching kernel alternatives

From: Borislav Petkov
Date: Wed Jul 10 2024 - 21:24:50 EST


On Thu, Jul 11, 2024 at 01:33:23AM +0300, Kirill A. Shutemov wrote:
> Hm. Do we have text_poke() in hot path?
>
> Even if we do, I doubt flipping AC flag would make any performance
> difference in context of all locking and TLB flushing we do in this
> codepath.

$ dmesg | grep text_poke | wc -l
237

In a silly guest.

And regardless, we don't do unnecessary toggling of rFLAGS.AC.

--
Regards/Gruss,
Boris.

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