Re: [PATCH v4 11/39] x86/mm: Update pte_modify for _PAGE_COW

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Dec 27, 2022 at 11:31:37PM +0000, Edgecombe, Rick P wrote:
> The comment is referring to the dirty bits possibly coming from
> newprot,

Ah right, ofc.

> but looking at it now I think the code was broken trying to
> fix the recent soft dirty test breakage. Now it might lose pre-existing
> dirty bits in the pte unessarily... I think.

Right, does this code need to be simplified?

I.e., match the shadow stack PTE (Write=0,Dirty=1) and handle that in a separate
helper?

So that the flows are separate. I'm not a mm guy but this function makes my head
hurt - dunno about other folks. :)

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux