n
> > Marinas ; Mark Rutland
> > ; James Morse ;
> > Matthew Wilcox ; Kirill A. Shutemov
> > ; linux-arm-ker...@lists.infradead.org;
> > linux-kernel@vger.kernel.org; linux...@kvack.org; Punit Agrawal
> > ; Thomas Gleixner ;
> > Andrew Morton ; hejia...@gm
inux-kernel@vger.kernel.org; linux...@kvack.org; Punit Agrawal
> ; Thomas Gleixner ;
> Andrew Morton ; hejia...@gmail.com; Kaly
> Xin (Arm Technology China) ; nd
> Subject: RE: [PATCH v10 2/3] arm64: mm: implement
> arch_faults_on_old_pte() on arm64
>
> Hi Will and Marc
>
&g
ists.infradead.org;
> linux-kernel@vger.kernel.org; linux...@kvack.org; Punit Agrawal
> ; Thomas Gleixner ;
> Andrew Morton ; hejia...@gmail.com; Kaly
> Xin (Arm Technology China)
> Subject: Re: [PATCH v10 2/3] arm64: mm: implement
> arch_faults_on_old_pte() on arm64
>
> On
On Tue, 1 Oct 2019 13:50:32 +0100
Will Deacon wrote:
> On Mon, Sep 30, 2019 at 09:57:39AM +0800, Jia He wrote:
> > On arm64 without hardware Access Flag, copying fromuser will fail because
> > the pte is old and cannot be marked young. So we always end up with zeroed
> > page after fork() + CoW f
On Mon, Sep 30, 2019 at 09:57:39AM +0800, Jia He wrote:
> On arm64 without hardware Access Flag, copying fromuser will fail because
> the pte is old and cannot be marked young. So we always end up with zeroed
> page after fork() + CoW for pfn mappings. we don't always have a
> hardware-managed acce
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