Messages in this thread | | | From | Nadav Amit <> | Subject | Re: [RFC PATCH v2 1/9] mm: Add new mm flags for Copy-On-Write PTE table | Date | Tue, 27 Sep 2022 17:23:58 +0000 |
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On Sep 27, 2022, at 9:29 AM, Chih-En Lin <shiyn.lin@gmail.com> wrote:
> Add MMF_COW_PTE{, _READY} flags to prepare the subsequent > implementation of Copy-On-Write for the page table. > > Signed-off-by: Chih-En Lin <shiyn.lin@gmail.com> > --- > include/linux/sched/coredump.h | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h > index 4d0a5be28b70f..f03ff69c90c8c 100644 > --- a/include/linux/sched/coredump.h > +++ b/include/linux/sched/coredump.h > @@ -84,7 +84,13 @@ static inline int get_dumpable(struct mm_struct *mm) > #define MMF_HAS_PINNED 28 /* FOLL_PIN has run, never cleared */ > #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) > > +#define MMF_COW_PTE_READY 29 > +#define MMF_COW_PTE_READY_MASK (1 << MMF_COW_PTE_READY) > + > +#define MMF_COW_PTE 30 > +#define MMF_COW_PTE_MASK (1 << MMF_COW_PTE)
I am not sure how much sense it makes to put it in a separate patch, and it is rather hard to understand the new flags without proper documentation and comments.
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