search for: get_zspage_inuse

...1) +struct zs_meta { + unsigned long class:CLASS_BITS; + unsigned long fullness:FULLNESS_BITS; + unsigned long inuse:INUSE_BITS; +}; struct mapping_area { #ifdef CONFIG_PGTABLE_MAPPING @@ -412,28 +415,61 @@ static int is_last_page(struct page *page) return PagePrivate2(page); } +static int get_zspage_inuse(struct page *first_page) +{ + struct zs_meta *m; + + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); + + m = (struct zs_meta *)&first_page->mapping; + + return m->inuse; +} + +static void set_zspage_inuse(struct page *first_page, int val) +{ + struct zs_meta *m; + + VM_BUG_ON_PAGE...

...@ -1956,6 +2009,12 @@ static struct page *isolate_source_page(struct size_class *class) if (!page) continue; + /* To prevent race between object and page migration */ + if (!trylock_zspage(page, NULL)) { + page = NULL; + continue; + } + remove_zspage(class, i, page); inuse = get_zspage_inuse(page); @@ -1964,6 +2023,7 @@ static struct page *isolate_source_page(struct size_class *class) if (inuse != freezed) { unfreeze_zspage(class, page, freezed); putback_zspage(class, page); + unlock_zspage(page, NULL); page = NULL; continue; } @@ -1995,6 +2055,12 @@ static stru...

Hi Minchan, [auto build test WARNING on next-20160318] [cannot apply to v4.5-rc7 v4.5-rc6 v4.5-rc5 v4.5] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Minchan-Kim/Support-non-lru-page-migration/20160321-143339 coccinelle warnings: (new ones prefixed by >>) >>

Hi Minchan, [auto build test WARNING on next-20160318] [cannot apply to v4.5-rc7 v4.5-rc6 v4.5-rc5 v4.5] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Minchan-Kim/Support-non-lru-page-migration/20160321-143339 coccinelle warnings: (new ones prefixed by >>) >>

Hello, On (03/30/16 16:12), Minchan Kim wrote: [..] > +static int get_zspage_inuse(struct page *first_page) > +{ > + struct zs_meta *m; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); > + > + m = (struct zs_meta *)&first_page->mapping; .. > +static void set_zspage_inuse(struct page *first_page, int val) > +{ > + struct zs_meta *m;...

Hello, On (03/30/16 16:12), Minchan Kim wrote: [..] > +static int get_zspage_inuse(struct page *first_page) > +{ > + struct zs_meta *m; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); > + > + m = (struct zs_meta *)&first_page->mapping; .. > +static void set_zspage_inuse(struct page *first_page, int val) > +{ > + struct zs_meta *m;...

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.

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.

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.

...s of various zspages. * Basically forming list of zspages in a fullness group. - * page->mapping: override by struct zs_meta + * page->freelist: override by struct zs_meta * * Usage of struct page flags: * PG_private: identifies the first component page @@ -418,7 +418,7 @@ static int get_zspage_inuse(struct page *first_page) VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); - m = (struct zs_meta *)&first_page->mapping; + m = (struct zs_meta *)&first_page->freelist; return m->inuse; } @@ -429,7 +429,7 @@ static void set_zspage_inuse(struct page *first_page, int...