[On behalf of justin...@arm.com]
Hi Matthew
On 2019/9/20 23:53, Matthew Wilcox wrote:
On Fri, Sep 20, 2019 at 09:54:37PM +0800, Jia He wrote:
-static inline void cow_user_page(struct page *dst, struct page *src, unsigned
long va, struct vm_area_struct *vma)
+static inline int cow_user_page(st
On Fri, Sep 20, 2019 at 08:53:00AM -0700, Matthew Wilcox wrote:
> On Fri, Sep 20, 2019 at 09:54:37PM +0800, Jia He wrote:
> > -static inline void cow_user_page(struct page *dst, struct page *src,
> > unsigned long va, struct vm_area_struct *vma)
> > +static inline int cow_user_page(struct page *ds
On Fri, Sep 20, 2019 at 09:54:37PM +0800, Jia He wrote:
> -static inline void cow_user_page(struct page *dst, struct page *src,
> unsigned long va, struct vm_area_struct *vma)
> +static inline int cow_user_page(struct page *dst, struct page *src,
> + struct vm_fault *vm
gt;; Jérôme Glisse ; Ralph Campbell
> ; hejia...@gmail.com; Kaly Xin (Arm Technology
> China) ; nd
> Subject: Re: [PATCH v7 3/3] mm: fix double page fault on arm64 if PTE_AF is
> cleared
>
> On Fri, Sep 20, 2019 at 09:54:37PM +0800, Jia He wrote:
> > When we tested pmdk unit test [1]
On Fri, Sep 20, 2019 at 09:54:37PM +0800, Jia He wrote:
> When we tested pmdk unit test [1] vmmalloc_fork TEST1 in arm64 guest, there
> will be a double page fault in __copy_from_user_inatomic of cow_user_page.
>
> Below call trace is from arm64 do_page_fault for debugging purpose
> [ 110.016195]
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