search for: class_bits

...of objects that are used in this zspage + * page->mapping: override by struct zs_meta * * Usage of struct page flags: * PG_private: identifies the first component page @@ -132,6 +131,13 @@ /* each chunk includes extra space to keep handle */ #define ZS_MAX_ALLOC_SIZE PAGE_SIZE +#define CLASS_BITS 8 +#define CLASS_MASK ((1 << CLASS_BITS) - 1) +#define FULLNESS_BITS 2 +#define FULLNESS_MASK ((1 << FULLNESS_BITS) - 1) +#define INUSE_BITS 11 +#define INUSE_MASK ((1 << INUSE_BITS) - 1) + /* * On systems with 4K page size, this gives 255 size classes! There is a * trader-of...

...ks together first pages of various zspages. * Basically forming list of zspages in a fullness group. * page->mapping: override by struct zs_meta @@ -131,6 +126,7 @@ /* each chunk includes extra space to keep handle */ #define ZS_MAX_ALLOC_SIZE PAGE_SIZE +#define FREEOBJ_BITS 11 #define CLASS_BITS 8 #define CLASS_MASK ((1 << CLASS_BITS) - 1) #define FULLNESS_BITS 2 @@ -228,17 +224,17 @@ struct size_class { /* * Placed within free objects to form a singly linked list. - * For every zspage, first_page->freelist gives head of this list. + * For every zspage, first_page->freeo...

...ks together first pages of various zspages. * Basically forming list of zspages in a fullness group. * page->mapping: override by struct zs_meta @@ -131,6 +126,7 @@ /* each chunk includes extra space to keep handle */ #define ZS_MAX_ALLOC_SIZE PAGE_SIZE +#define FREEOBJ_BITS 11 #define CLASS_BITS 8 #define CLASS_MASK ((1 << CLASS_BITS) - 1) #define FULLNESS_BITS 2 @@ -228,17 +224,17 @@ struct size_class { /* * Placed within free objects to form a singly linked list. - * For every zspage, first_page->freelist gives head of this list. + * For every zspage, first_page->freeo...

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.