search for: get_fullness_group

...signed int index; > > struct zs_size_stat stats; > @@ -622,21 +621,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) > * the pool (not yet implemented). This function returns fullness > * status of the given page. > */ > -static enum fullness_group get_fullness_group(struct page *first_page) > +static enum fullness_group get_fullness_group(struct size_class *class, > + struct page *first_page) > { > - int inuse, max_objects; > + int inuse, objs_per_zspage; > enum fullness_group fg; > > VM_BUG_ON_PAGE(!is_first_page(first_pag...

...signed int index; > > struct zs_size_stat stats; > @@ -622,21 +621,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) > * the pool (not yet implemented). This function returns fullness > * status of the given page. > */ > -static enum fullness_group get_fullness_group(struct page *first_page) > +static enum fullness_group get_fullness_group(struct size_class *class, > + struct page *first_page) > { > - int inuse, max_objects; > + int inuse, objs_per_zspage; > enum fullness_group fg; > > VM_BUG_ON_PAGE(!is_first_page(first_pag...

...int size; + int objs_per_zspage; unsigned int index; struct zs_size_stat stats; @@ -622,21 +621,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) * the pool (not yet implemented). This function returns fullness * status of the given page. */ -static enum fullness_group get_fullness_group(struct page *first_page) +static enum fullness_group get_fullness_group(struct size_class *class, + struct page *first_page) { - int inuse, max_objects; + int inuse, objs_per_zspage; enum fullness_group fg; VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); inuse = first_page-&...

...int size; + int objs_per_zspage; unsigned int index; struct zs_size_stat stats; @@ -627,21 +626,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) * the pool (not yet implemented). This function returns fullness * status of the given page. */ -static enum fullness_group get_fullness_group(struct page *first_page) +static enum fullness_group get_fullness_group(struct size_class *class, + struct page *first_page) { - int inuse, max_objects; + int inuse, objs_per_zspage; enum fullness_group fg; VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); inuse = first_page-&...

...gt; > struct zs_size_stat stats; > >@@ -622,21 +621,22 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) > > * the pool (not yet implemented). This function returns fullness > > * status of the given page. > > */ > >-static enum fullness_group get_fullness_group(struct page *first_page) > >+static enum fullness_group get_fullness_group(struct size_class *class, > >+ struct page *first_page) > > { > >- int inuse, max_objects; > >+ int inuse, objs_per_zspage; > > enum fullness_group fg; > > > > VM_BUG...

...uct address_space *)m; + first_page->mapping = (struct address_space *)m; } /* @@ -620,14 +622,14 @@ static inline void zs_pool_stat_destroy(struct zs_pool *pool) * the pool (not yet implemented). This function returns fullness * status of the given page. */ -static enum fullness_group get_fullness_group(struct page *page) +static enum fullness_group get_fullness_group(struct page *first_page) { int inuse, max_objects; enum fullness_group fg; - BUG_ON(!is_first_page(page)); + BUG_ON(!is_first_page(first_page)); - inuse = page->inuse; - max_objects = page->objects; + inuse = first_page-...

...enum fullness_group fullness) { unsigned long m; - BUG_ON(!is_first_page(first_page)); + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); m = ((class_idx & CLASS_IDX_MASK) << FULLNESS_BITS) | (fullness & FULLNESS_MASK); @@ -626,7 +626,8 @@ static enum fullness_group get_fullness_group(struct page *first_page) { int inuse, max_objects; enum fullness_group fg; - BUG_ON(!is_first_page(first_page)); + + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); inuse = first_page->inuse; max_objects = first_page->objects; @@ -654,7 +655,7 @@ static void insert_zspage(s...

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.

...*entry; @@ -604,7 +604,7 @@ static void __exit zs_stat_exit(void) { } -static inline int zs_pool_stat_create(const char *name, struct zs_pool *pool) +static inline int zs_pool_stat_create(struct zs_pool *pool, const char *name) { return 0; } @@ -650,8 +650,9 @@ static enum fullness_group get_fullness_group(struct page *first_page) * have. This functions inserts the given zspage into the freelist * identified by <class, fullness_group>. */ -static void insert_zspage(struct page *first_page, struct size_class *class, - enum fullness_group fullness) +static void insert_zspage(struct size_...

...); @@ -1850,6 +1902,7 @@ static enum fullness_group putback_zspage(struct size_class *class, VM_BUG_ON_PAGE(!list_empty(&first_page->lru), first_page); VM_BUG_ON_PAGE(ZsPageIsolate(first_page), first_page); + VM_BUG_ON_PAGE(check_isolated_page(first_page), first_page); fullness = get_fullness_group(class, first_page); insert_zspage(class, fullness, first_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;...

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.

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 >>) >>

...p; CLASS_IDX_MASK) << FULLNESS_BITS) | - (fullness & FULLNESS_MASK); - first_page->mapping = (struct address_space *)m; + m = (struct zs_meta *)&first_page->mapping; + m->fullness = fullness; + m->class = class_idx; } /* @@ -632,9 +668,7 @@ static enum fullness_group get_fullness_group(struct size_class *class, int inuse, objs_per_zspage; enum fullness_group fg; - VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); - - inuse = first_page->inuse; + inuse = get_zspage_inuse(first_page); objs_per_zspage = class->objs_per_zspage; if (inuse == 0) @@ -677,10 +711,...

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.