search for: class_idx

...eletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 2d7c4c11fc63..bb29203ec6b3 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -414,26 +414,28 @@ static int is_last_page(struct page *page) return PagePrivate2(page); } -static void get_zspage_mapping(struct page *page, unsigned int *class_idx, +static void get_zspage_mapping(struct page *first_page, + unsigned int *class_idx, enum fullness_group *fullness) { unsigned long m; - BUG_ON(!is_first_page(page)); + BUG_ON(!is_first_page(first_page)); - m = (unsigned long)page->mapping; + m = (unsigned long)first_page->mappin...

...e_inuse(struct page *first_page, int val) > +{ > + struct zs_meta *m; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); > + > + m = (struct zs_meta *)&first_page->mapping; .. > static void get_zspage_mapping(struct page *first_page, > unsigned int *class_idx, > enum fullness_group *fullness) > { > - unsigned long m; > + 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_mapping(struct page *first_page, >...

...e_inuse(struct page *first_page, int val) > +{ > + struct zs_meta *m; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page), first_page); > + > + m = (struct zs_meta *)&first_page->mapping; .. > static void get_zspage_mapping(struct page *first_page, > unsigned int *class_idx, > enum fullness_group *fullness) > { > - unsigned long m; > + 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_mapping(struct page *first_page, >...

...um fullness_group { ZS_ALMOST_EMPTY, _ZS_NR_FULLNESS_GROUPS, - ZS_EMPTY, + ZS_EMPTY = _ZS_NR_FULLNESS_GROUPS, ZS_FULL }; @@ -263,14 +269,11 @@ struct zs_pool { #endif }; -/* - * A zspage's class index and fullness group - * are encoded in its (first)page->mapping - */ -#define CLASS_IDX_BITS 28 -#define FULLNESS_BITS 4 -#define CLASS_IDX_MASK ((1 << CLASS_IDX_BITS) - 1) -#define FULLNESS_MASK ((1 << FULLNESS_BITS) - 1) +struct zs_meta { + unsigned long class:CLASS_BITS; + unsigned long fullness:FULLNESS_BITS; + unsigned long inuse:INUSE_BITS; +}; struct mapping_area...

...+++++++++++++++++++++++------- 1 file changed, 115 insertions(+), 16 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 9b4b03d8f993..35bafa0bc3f1 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -551,6 +551,19 @@ static void set_zspage_mapping(struct page *first_page, m->class = class_idx; } +static bool check_isolated_page(struct page *first_page) +{ + struct page *cursor; + + for (cursor = first_page; cursor != NULL; cursor = + get_next_page(cursor)) { + if (PageIsolated(cursor)) + return true; + } + + return false; +} + /* * zsmalloc divides the pool into various siz...

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 >>) >>

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.

...first_page->mapping; *fullness = m & FULLNESS_MASK; @@ -431,7 +431,7 @@ static void set_zspage_mapping(struct page *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_pa...

...atic unsigned long get_freeobj(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->freeobj; +} + static void get_zspage_mapping(struct page *first_page, unsigned int *class_idx, enum fullness_group *fullness) @@ -837,30 +854,33 @@ static struct page *get_next_page(struct page *page) return next; } -/* - * Encode <page, obj_idx> as a single handle value. - * We use the least bit of handle for tagging. - */ -static void *location_to_obj(struct page *page, un...

...atic unsigned long get_freeobj(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->freeobj; +} + static void get_zspage_mapping(struct page *first_page, unsigned int *class_idx, enum fullness_group *fullness) @@ -832,30 +849,33 @@ static struct page *get_next_page(struct page *page) return next; } -/* - * Encode <page, obj_idx> as a single handle value. - * We use the least bit of handle for tagging. - */ -static void *location_to_obj(struct page *page, un...

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.

...n m->freeobj; } @@ -471,7 +471,7 @@ static void get_zspage_mapping(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; *fullness = m->fullness; *class_idx = m->class; } @@ -484,7 +484,7 @@ static void set_zspage_mapping(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; m->fullness = fullness; m-&gt...

...er_zspage / fullness_threshold_frac) > fg = ZS_ALMOST_EMPTY; > else > fg = ZS_ALMOST_FULL; > @@ -723,7 +723,7 @@ static enum fullness_group fix_fullness_group(struct size_class *class, > enum fullness_group currfg, newfg; > > get_zspage_mapping(first_page, &class_idx, &currfg); > - newfg = get_fullness_group(first_page); > + newfg = get_fullness_group(class, first_page); > if (newfg == currfg) > goto out; > > @@ -1003,9 +1003,6 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) > init_zspage(class, firs...

...er_zspage / fullness_threshold_frac) > fg = ZS_ALMOST_EMPTY; > else > fg = ZS_ALMOST_FULL; > @@ -723,7 +723,7 @@ static enum fullness_group fix_fullness_group(struct size_class *class, > enum fullness_group currfg, newfg; > > get_zspage_mapping(first_page, &class_idx, &currfg); > - newfg = get_fullness_group(first_page); > + newfg = get_fullness_group(class, first_page); > if (newfg == currfg) > goto out; > > @@ -1003,9 +1003,6 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) > init_zspage(class, firs...

...ol *pool, struct size_class *class, - unsigned long obj) +static void obj_free(struct size_class *class, unsigned long obj) { struct link_free *link; struct page *first_page, *f_page; @@ -1482,7 +1481,7 @@ void zs_free(struct zs_pool *pool, unsigned long handle) class = pool->size_class[class_idx]; spin_lock(&class->lock); - obj_free(pool, class, obj); + obj_free(class, obj); fullness = fix_fullness_group(class, first_page); if (fullness == ZS_EMPTY) { zs_stat_dec(class, OBJ_ALLOCATED, get_maxobj_per_zspage( @@ -1645,7 +1644,7 @@ static int migrate_zspage(struct zs_pool *p...