search for: get_next_page

...00644 --- 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 size classes where each * class maintains a list of zspages where each zspage is divided @@ -1052,6 +1065,44 @@ void lock_zspage(struct page *first_page) } while ((...

...ge; > + nr_page = ofs >> PAGE_SHIFT; > > - obj = page_to_pfn(page) << OBJ_INDEX_BITS; > - obj |= ((obj_idx) & OBJ_INDEX_MASK); > - obj <<= OBJ_TAG_BITS; > + *ofs_in_page = ofs & ~PAGE_MASK; > + > + for (i = 0; i < nr_page; i++) > + cursor = get_next_page(cursor); > > - return (void *)obj; > + *obj_page = cursor; > }

...ge; > + nr_page = ofs >> PAGE_SHIFT; > > - obj = page_to_pfn(page) << OBJ_INDEX_BITS; > - obj |= ((obj_idx) & OBJ_INDEX_MASK); > - obj <<= OBJ_TAG_BITS; > + *ofs_in_page = ofs & ~PAGE_MASK; > + > + for (i = 0; i < nr_page; i++) > + cursor = get_next_page(cursor); > > - return (void *)obj; > + *obj_page = cursor; > }

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 >>) >>

...obj_idx * class->size; int nr_page = offset >> PAGE_SHIFT; unsigned long offset_in_page = offset & ~PAGE_MASK; void *addr; int i; if (class->huge) { VM_BUG_ON_PAGE(!is_first_page(page), page); return &page_private(page); } for (i = 0; i < nr_page; i++) cursor = get_next_page(cursor); addr = kmap_atomic(cursor); return addr + offset_in_page; } static void unmap_handle(unsigned long *addr) { if (class->huge) { return; } kunmap_atomic(addr & ~PAGE_MASK); } all functions called "objidx_to_page_and_ofs" could use it like this, for example: s...

...obj_idx * class->size; int nr_page = offset >> PAGE_SHIFT; unsigned long offset_in_page = offset & ~PAGE_MASK; void *addr; int i; if (class->huge) { VM_BUG_ON_PAGE(!is_first_page(page), page); return &page_private(page); } for (i = 0; i < nr_page; i++) cursor = get_next_page(cursor); addr = kmap_atomic(cursor); return addr + offset_in_page; } static void unmap_handle(unsigned long *addr) { if (class->huge) { return; } kunmap_atomic(addr & ~PAGE_MASK); } all functions called "objidx_to_page_and_ofs" could use it like this, for example: s...

...G_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, unsigned long obj_idx) +static void objidx_to_page_and_offset(struct size_class *class, + st...

...G_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, unsigned long obj_idx) +static void objidx_to_page_and_ofs(struct size_class *class, + struc...

...; - BUG_ON(!obj); - obj &= ~OBJ_ALLOCATED_TAG; obj_to_location(obj, &f_page, &f_objidx); first_page = get_first_page(f_page); @@ -1546,7 +1540,6 @@ static void zs_object_copy(unsigned long dst, unsigned long src, kunmap_atomic(d_addr); kunmap_atomic(s_addr); s_page = get_next_page(s_page); - BUG_ON(!s_page); s_addr = kmap_atomic(s_page); d_addr = kmap_atomic(d_page); s_size = class->size - written; @@ -1556,7 +1549,6 @@ static void zs_object_copy(unsigned long dst, unsigned long src, if (d_off >= PAGE_SIZE) { kunmap_atomic(d_addr); d_page = get...

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.

...HIFT; > > > > - obj = page_to_pfn(page) << OBJ_INDEX_BITS; > > - obj |= ((obj_idx) & OBJ_INDEX_MASK); > > - obj <<= OBJ_TAG_BITS; > > + *ofs_in_page = ofs & ~PAGE_MASK; > > + > > + for (i = 0; i < nr_page; i++) > > + cursor = get_next_page(cursor); > > > > - return (void *)obj; > > + *obj_page = cursor; > > }

...+ nr_page = offset >> PAGE_SHIFT; > > - obj = page_to_pfn(page) << OBJ_INDEX_BITS; > - obj |= ((obj_idx) & OBJ_INDEX_MASK); > - obj <<= OBJ_TAG_BITS; > + *offset_in_page = offset & ~PAGE_MASK; > + > + for (i = 0; i < nr_page; i++) > + cursor = get_next_page(cursor); > > - return (void *)obj; > + *obj_page = cursor; > } -ss

...+ nr_page = offset >> PAGE_SHIFT; > > - obj = page_to_pfn(page) << OBJ_INDEX_BITS; > - obj |= ((obj_idx) & OBJ_INDEX_MASK); > - obj <<= OBJ_TAG_BITS; > + *offset_in_page = offset & ~PAGE_MASK; > + > + for (i = 0; i < nr_page; i++) > + cursor = get_next_page(cursor); > > - return (void *)obj; > + *obj_page = cursor; > } -ss

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.

...unsigned long head; int offset = 0; @@ -1614,7 +1616,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, int ret = 0; while (1) { - handle = find_alloced_obj(s_page, index, class); + handle = find_alloced_obj(class, s_page, index); if (!handle) { s_page = get_next_page(s_page); if (!s_page) @@ -1631,8 +1633,8 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, } used_obj = handle_to_obj(handle); - free_obj = obj_malloc(d_page, class, handle); - zs_object_copy(free_obj, used_obj, class); + free_obj = obj_malloc(class, d_page...