search for: set_page_private

...+ int i; > + struct page *page; > + struct page *prev_page = NULL; > + struct page *first_page = NULL; > + > + for (i = 0; i < nr_pages; i++) { > + page = pages[i]; > + > + INIT_LIST_HEAD(&page->lru); > + if (i == 0) { > + SetPagePrivate(page); > + set_page_private(page, 0); > + first_page = page; > + } > + > + if (i == 1) > + set_page_private(first_page, (unsigned long)page); > + if (i >= 1) > + set_page_private(page, (unsigned long)first_page); > + if (i >= 2) > + list_add(&page->lru, &prev_page->lr...

...+ int i; > + struct page *page; > + struct page *prev_page = NULL; > + struct page *first_page = NULL; > + > + for (i = 0; i < nr_pages; i++) { > + page = pages[i]; > + > + INIT_LIST_HEAD(&page->lru); > + if (i == 0) { > + SetPagePrivate(page); > + set_page_private(page, 0); > + first_page = page; > + } > + > + if (i == 1) > + set_page_private(first_page, (unsigned long)page); > + if (i >= 1) > + set_page_private(page, (unsigned long)first_page); > + if (i >= 2) > + list_add(&page->lru, &prev_page->lr...

...reate_page_chain(struct page *pages[], int nr_pages) +{ + int i; + struct page *page; + struct page *prev_page = NULL; + struct page *first_page = NULL; + + for (i = 0; i < nr_pages; i++) { + page = pages[i]; + + INIT_LIST_HEAD(&page->lru); + if (i == 0) { + SetPagePrivate(page); + set_page_private(page, 0); + first_page = page; + } + + if (i == 1) + set_page_private(first_page, (unsigned long)page); + if (i >= 1) + set_page_private(page, (unsigned long)first_page); + if (i >= 2) + list_add(&page->lru, &prev_page->lru); + if (i == nr_pages - 1) + SetPagePriv...

...reate_page_chain(struct page *pages[], int nr_pages) +{ + int i; + struct page *page; + struct page *prev_page = NULL; + struct page *first_page = NULL; + + for (i = 0; i < nr_pages; i++) { + page = pages[i]; + + INIT_LIST_HEAD(&page->lru); + if (i == 0) { + SetPagePrivate(page); + set_page_private(page, 0); + first_page = page; + } + + if (i == 1) + set_page_private(first_page, (unsigned long)page); + if (i >= 1) + set_page_private(page, (unsigned long)first_page); + if (i >= 2) + list_add(&page->lru, &prev_page->lru); + if (i == nr_pages - 1) + SetPagePriv...

...ream to Linux. > >What do you think of the followings? Too hacky? > > >extern struct address_space xen_ia64_foreign_dummy_mapping; >#define PageForeign(page) \ > (page->mapping == &xen_ia64_foreign_dummy_mapping) > >#define SetPageForeign(page, dtor) do { \ > set_page_private((page), (unsigned long)dtor); \ > (page)->mapping = &xen_ia64_foreign_dummy_mapping; \ >} while (0) > >#define ClearPageForeign(page) do { \ > (page)->mapping = NULL; \ > set_page_private((page), 0); \ >} while (0) > >#define PageForeignDestructor(page) \ >...

...page, link->next >> OBJ_ALLOCATED_TAG); > if (!class->huge) > /* record handle in the header of allocated chunk */ > - link->handle = handle; > + link->handle = handle | OBJ_ALLOCATED_TAG; > else > /* record handle in first_page->private */ > - set_page_private(first_page, handle); > + set_page_private(first_page, handle | OBJ_ALLOCATED_TAG); > kunmap_atomic(vaddr); > mod_zspage_inuse(first_page, 1); > zs_stat_inc(class, OBJ_USED, 1);

...page, link->next >> OBJ_ALLOCATED_TAG); > if (!class->huge) > /* record handle in the header of allocated chunk */ > - link->handle = handle; > + link->handle = handle | OBJ_ALLOCATED_TAG; > else > /* record handle in first_page->private */ > - set_page_private(first_page, handle); > + set_page_private(first_page, handle | OBJ_ALLOCATED_TAG); > kunmap_atomic(vaddr); > mod_zspage_inuse(first_page, 1); > zs_stat_inc(class, OBJ_USED, 1);

...>> > >> > >> >extern struct address_space xen_ia64_foreign_dummy_mapping; >> >#define PageForeign(page) \ >> > (page->mapping == &xen_ia64_foreign_dummy_mapping) >> > >> >#define SetPageForeign(page, dtor) do { \ >> > set_page_private((page), (unsigned long)dtor); \ >> > (page)->mapping = &xen_ia64_foreign_dummy_mapping; \ >> >} while (0) >> > >> >#define ClearPageForeign(page) do { \ >> > (page)->mapping = NULL; \ >> > set_page_private((page), 0); \ >> >...

...action.h > +++ b/include/linux/balloon_compaction.h > @@ -100,8 +100,12 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > struct page *page) > { > __SetPageOffline(page); > - __SetPageMovable(page, balloon->inode->i_mapping); > - set_page_private(page, (unsigned long)balloon); > + if (balloon->inode) { > + __SetPageMovable(page, balloon->inode->i_mapping); > + set_page_private(page, (unsigned long)balloon); > + } else { > + set_page_private(page, 0); > + } > list_add(&page->lru, &balloon->pag...

...>+ struct page *prev_page = NULL; > >+ struct page *first_page = NULL; > >+ > >+ for (i = 0; i < nr_pages; i++) { > >+ page = pages[i]; > >+ > >+ INIT_LIST_HEAD(&page->lru); > >+ if (i == 0) { > >+ SetPagePrivate(page); > >+ set_page_private(page, 0); > >+ first_page = page; > >+ } > >+ > >+ if (i == 1) > >+ set_page_private(first_page, (unsigned long)page); > >+ if (i >= 1) > >+ set_page_private(page, (unsigned long)first_page); > >+ if (i >= 2) > >+ list_add(&amp...

...ge); - VM_BUG_ON_PAGE(first_page->inuse, first_page); + VM_BUG_ON_PAGE(get_zspage_inuse(first_page), first_page); head_extra = (struct page *)page_private(first_page); @@ -992,7 +1026,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) SetPagePrivate(page); set_page_private(page, 0); first_page = page; - first_page->inuse = 0; + set_zspage_inuse(page, 0); } if (i == 1) set_page_private(first_page, (unsigned long)page); @@ -1237,9 +1271,7 @@ static bool can_merge(struct size_class *prev, int size, int pages_per_zspage) static bool zspage_full(st...

...action.h > +++ b/include/linux/balloon_compaction.h > @@ -100,8 +100,12 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > struct page *page) > { > __SetPageOffline(page); > - __SetPageMovable(page, balloon->inode->i_mapping); > - set_page_private(page, (unsigned long)balloon); > + if (balloon->inode) { > + __SetPageMovable(page, balloon->inode->i_mapping); > + set_page_private(page, (unsigned long)balloon); > + } else { > + set_page_private(page, 0); > + } > list_add(&page->lru, &balloon->pag...

...action.h > +++ b/include/linux/balloon_compaction.h > @@ -100,8 +100,12 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > struct page *page) > { > __SetPageOffline(page); > - __SetPageMovable(page, balloon->inode->i_mapping); > - set_page_private(page, (unsigned long)balloon); > + if (balloon->inode) { > + __SetPageMovable(page, balloon->inode->i_mapping); > + set_page_private(page, (unsigned long)balloon); > + } else { > + set_page_private(page, 0); > + } > list_add(&page->lru, &balloon->pag...

...ate_mode mode); > > /* > @@ -124,6 +130,7 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > struct page *page) > { > __SetPageBalloon(page); > + page->mapping = balloon->inode->i_mapping; > SetPagePrivate(page); > set_page_private(page, (unsigned long)balloon); > list_add(&page->lru, &balloon->pages); > @@ -140,6 +147,7 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > static inline void balloon_page_delete(struct page *page) > { > __ClearPageBalloon(page); >...

...ate_mode mode); > > /* > @@ -124,6 +130,7 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > struct page *page) > { > __SetPageBalloon(page); > + page->mapping = balloon->inode->i_mapping; > SetPagePrivate(page); > set_page_private(page, (unsigned long)balloon); > list_add(&page->lru, &balloon->pages); > @@ -140,6 +147,7 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, > static inline void balloon_page_delete(struct page *page) > { > __ClearPageBalloon(page); >...

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and failed to fork easily. The problem was fragmentation caused by zram and GPU driver pages. Their pages cannot be migrated so compaction cannot work well, either so reclaimer ends up shrinking all of working set pages. It made system very slow and even to fail to fork easily.

Recently, I got many reports about perfermance degradation in embedded system(Android mobile phone, webOS TV and so on) and failed to fork easily. The problem was fragmentation caused by zram and GPU driver pages. Their pages cannot be migrated so compaction cannot work well, either so reclaimer ends up shrinking all of working set pages. It made system very slow and even to fail to fork easily.

...builds? otherwise the users (zsmalloc, for example) have to do things like static void reset_page(struct page *page) { #ifdef CONFIG_COMPACTION __ClearPageMovable(page); #endif clear_bit(PG_private, &page->flags); clear_bit(PG_private_2, &page->flags); set_page_private(page, 0); ClearPageHugeObject(page); page->freelist = NULL; } -ss

...builds? otherwise the users (zsmalloc, for example) have to do things like static void reset_page(struct page *page) { #ifdef CONFIG_COMPACTION __ClearPageMovable(page); #endif clear_bit(PG_private, &page->flags); clear_bit(PG_private_2, &page->flags); set_page_private(page, 0); ClearPageHugeObject(page); page->freelist = NULL; } -ss

...&first_page->mapping; + m = (struct zs_meta *)&first_page->freelist; m->fullness = fullness; m->class = class_idx; } @@ -946,7 +946,6 @@ static void reset_page(struct page *page) clear_bit(PG_private, &page->flags); clear_bit(PG_private_2, &page->flags); set_page_private(page, 0); - page->mapping = NULL; page->freelist = NULL; } @@ -1056,6 +1055,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) INIT_LIST_HEAD(&page->lru); if (i == 0) { /* first page */ + page->freelist = NULL; SetPagePrivate(page); s...