search for: page_mapping_anon

...gt; #define PAGE_MAPPING_MOVABLE 0x2 > page->mapping = page->mapping | PAGE_MAPPING_MOVABLE; Interesting, let's see how that works out... Overal this looks much better than the last version I checked! [...] > @@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY) > * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h. > * > * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled, > - * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit; > - * and then page->mapping points, not to an anon_vma, but to a private > +...

...gt; #define PAGE_MAPPING_MOVABLE 0x2 > page->mapping = page->mapping | PAGE_MAPPING_MOVABLE; Interesting, let's see how that works out... Overal this looks much better than the last version I checked! [...] > @@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY) > * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h. > * > * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled, > - * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit; > - * and then page->mapping points, not to an anon_vma, but to a private > +...

...mapping = page->mapping | PAGE_MAPPING_MOVABLE; > > Interesting, let's see how that works out... > > Overal this looks much better than the last version I checked! Thanks. > > [...] > > >@@ -357,29 +360,37 @@ PAGEFLAG(Idle, idle, PF_ANY) > > * with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h. > > * > > * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled, > >- * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit; > >- * and then page->mapping points, not to an anon_vma, but to a...

...a 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -43,8 +43,7 @@ static inline struct stable_node *page_stable_node(struct page *page) static inline void set_page_stable_node(struct page *page, struct stable_node *stable_node) { - page->mapping = (void *)stable_node + - (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM); + page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); } /* diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9b50325e4ddf..404fbfefeb33 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -37,6 +37,8 @@ extern int...

...a 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -43,8 +43,7 @@ static inline struct stable_node *page_stable_node(struct page *page) static inline void set_page_stable_node(struct page *page, struct stable_node *stable_node) { - page->mapping = (void *)stable_node + - (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM); + page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); } /* diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9b50325e4ddf..404fbfefeb33 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -37,6 +37,8 @@ extern int...

...a 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -43,8 +43,7 @@ static inline struct stable_node *page_stable_node(struct page *page) static inline void set_page_stable_node(struct page *page, struct stable_node *stable_node) { - page->mapping = (void *)stable_node + - (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM); + page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); } /* diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9b50325e4ddf..404fbfefeb33 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -37,6 +37,8 @@ extern int...

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

...a 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -43,8 +43,7 @@ static inline struct stable_node *page_stable_node(struct page *page) static inline void set_page_stable_node(struct page *page, struct stable_node *stable_node) { - page->mapping = (void *)stable_node + - (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM); + page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); } /* diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9b50325e4ddf..404fbfefeb33 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -37,6 +37,8 @@ extern int...

...a 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -43,8 +43,7 @@ static inline struct stable_node *page_stable_node(struct page *page) static inline void set_page_stable_node(struct page *page, struct stable_node *stable_node) { - page->mapping = (void *)stable_node + - (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM); + page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); } /* diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9b50325e4ddf..31a748f43fa9 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -32,11 +32,16 @@ extern c...

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

On 09/08/19 18:24, Matthew Wilcox wrote: > On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: >> +++ b/include/linux/page-flags.h >> @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) >> */ >> #define PAGE_MAPPING_ANON 0x1 >> #define PAGE_MAPPING_MOVABLE 0x2 >> +#define PAGE_MAPPING_REMOTE 0x4 > Uh. How do you know page->mapping would otherwise have bit 2 clear? > Who's guaranteeing that? > > This is an awfully big patch to the memory management code, buried in > the middle of...

On 09/08/19 18:24, Matthew Wilcox wrote: > On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: >> +++ b/include/linux/page-flags.h >> @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) >> */ >> #define PAGE_MAPPING_ANON 0x1 >> #define PAGE_MAPPING_MOVABLE 0x2 >> +#define PAGE_MAPPING_REMOTE 0x4 > Uh. How do you know page->mapping would otherwise have bit 2 clear? > Who's guaranteeing that? > > This is an awfully big patch to the memory management code, buried in > the middle of...

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and easy fork fail. The problem was fragmentation caused by zram and GPU driver mainly. With memory pressure, their pages were spread out all of pageblock and it cannot be migrated with current compaction algorithm which supports only LRU pages. In the end, compaction cannot

...ux/remote_mapping.h create mode 100644 mm/remote_mapping.c diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 39b4494e29f1..3f65b2833562 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) */ #define PAGE_MAPPING_ANON 0x1 #define PAGE_MAPPING_MOVABLE 0x2 +#define PAGE_MAPPING_REMOTE 0x4 #define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE) -#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE) +#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE | \ + PAGE_MAP...

On Fri, Aug 09, 2019 at 07:00:26PM +0300, Adalbert Laz?r wrote: > +++ b/include/linux/page-flags.h > @@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY) > */ > #define PAGE_MAPPING_ANON 0x1 > #define PAGE_MAPPING_MOVABLE 0x2 > +#define PAGE_MAPPING_REMOTE 0x4 Uh. How do you know page->mapping would otherwise have bit 2 clear? Who's guaranteeing that? This is an awfully big patch to the memory management code, buried in the middle of a gigantic series which almost...