On Fri, Nov 09, 2018 at 03:58:27PM +0530, Anshuman Khandual wrote:
>
>
> On 11/09/2018 12:17 PM, Naoya Horiguchi wrote:
> > num_poisoned_pages_inc/dec had better be visible to some file like
> > mm/sparse.c and mm/page_alloc.c (for a subsequent patch). So let's
> > move it to include/linux/mm.h.
> >
> > Signed-off-by: Naoya Horiguchi <[email protected]>
> > ---
> > include/linux/mm.h | 13 ++++++++++++-
> > include/linux/swapops.h | 16 ----------------
> > mm/sparse.c | 2 +-
> > 3 files changed, 13 insertions(+), 18 deletions(-)
> >
> > diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
> > v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> > index 59df394..22623ba 100644
> > --- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> > @@ -2741,7 +2741,7 @@ extern void shake_page(struct page *p, int access);
> > extern atomic_long_t num_poisoned_pages __read_mostly;
> > extern int soft_offline_page(struct page *page, int flags);
> >
> > -
> > +#ifdef CONFIG_MEMORY_FAILURE
> > /*
> > * Error handlers for various types of pages.
> > */
> > @@ -2777,6 +2777,17 @@ enum mf_action_page_type {
> > MF_MSG_UNKNOWN,
> > };
> >
> > +static inline void num_poisoned_pages_inc(void)
> > +{
> > + atomic_long_inc(&num_poisoned_pages);
> > +}
> > +
> > +static inline void num_poisoned_pages_dec(void)
> > +{
> > + atomic_long_dec(&num_poisoned_pages);
> > +}
> > +#endif
> > +
> > #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
> > extern void clear_huge_page(struct page *page,
> > unsigned long addr_hint,
> > diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
> > v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> > index 4d96166..88137e9 100644
> > --- v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> > @@ -320,8 +320,6 @@ static inline int is_pmd_migration_entry(pmd_t pmd)
> >
> > #ifdef CONFIG_MEMORY_FAILURE
> >
> > -extern atomic_long_t num_poisoned_pages __read_mostly;
> > -
> > /*
> > * Support for hardware poisoned pages
> > */
> > @@ -336,16 +334,6 @@ static inline int is_hwpoison_entry(swp_entry_t entry)
> > return swp_type(entry) == SWP_HWPOISON;
> > }
> >
> > -static inline void num_poisoned_pages_inc(void)
> > -{
> > - atomic_long_inc(&num_poisoned_pages);
> > -}
> > -
> > -static inline void num_poisoned_pages_dec(void)
> > -{
> > - atomic_long_dec(&num_poisoned_pages);
> > -}
> > -
> > #else
> >
> > static inline swp_entry_t make_hwpoison_entry(struct page *page)
> > @@ -357,10 +345,6 @@ static inline int is_hwpoison_entry(swp_entry_t swp)
> > {
> > return 0;
> > }
> > -
> > -static inline void num_poisoned_pages_inc(void)
> > -{
> > -}
>
> I hope this was a stray definition and redundant which does not prevent
> build in absence of CONFIG_MEMORY_FAILURE.
You're right :)
> > #endif
> >
> > #if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
> > diff --git v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
> > v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> > index 33307fc..7ada2e5 100644
> > --- v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> > @@ -726,7 +726,7 @@ static void clear_hwpoisoned_pages(struct page *memmap,
> > int nr_pages)
> >
> > for (i = 0; i < nr_pages; i++) {
> > if (PageHWPoison(&memmap[i])) {
> > - atomic_long_sub(1, &num_poisoned_pages);
> > + num_poisoned_pages_dec();
> > ClearPageHWPoison(&memmap[i]);
> > }
> > }
> >
>
> Otherwise looks good.
>
> Reviewed-by: Anshuman Khandual <[email protected]>
Thanks!
Naoya Horiguchi
