search for: zs_meta

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; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page...

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; > + > + VM_BUG_ON_PAGE(!is_first_page(first_page...

For supporting migration from VM, we need to have address_space on every page so zsmalloc shouldn't use page->mapping. So, this patch moves zs_meta from mapping to freelist. Signed-off-by: Minchan Kim <minchan at kernel.org> --- mm/zsmalloc.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 807998462539..d4d33a819832 100644 --- a/mm/zsmalloc.c +++ b/mm/zsma...

...page->lru: links together first pages of various zspages. * Basically forming list of zspages in a fullness group. - * page->mapping: class index and fullness group of the zspage - * page->inuse: the number 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...

...- * page->freelist: points to the first free object in zspage. - * Free objects are linked together using in-place - * metadata. * page->lru: links 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 withi...

...- * page->freelist: points to the first free object in zspage. - * Free objects are linked together using in-place - * metadata. * page->lru: links 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 withi...

...se general movable page feature into balloon 4. zsmalloc clean-up for preparing page migration zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: remove page_mapcount_reset zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring 5. add zsmalloc page migration zsmalloc: migrate head page of zspage zsmalloc: use single linked list for page chain zsmalloc: migr...

...se general movable page feature into balloon 4. zsmalloc clean-up for preparing page migration zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: remove page_mapcount_reset zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring 5. add zsmalloc page migration zsmalloc: migrate head page of zspage zsmalloc: use single linked list for page chain zsmalloc: migr...

...than page zsmalloc: clean up many BUG_ON zsmalloc: reordering function parameter zsmalloc: remove unused pool param in obj_free zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring zsmalloc: migrate head page of zspage zsmalloc: use single linked list for page chain zsmalloc: migrate tail pages in zspage zram:...

...than page zsmalloc: clean up many BUG_ON zsmalloc: reordering function parameter zsmalloc: remove unused pool param in obj_free zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring zsmalloc: migrate head page of zspage zsmalloc: use single linked list for page chain zsmalloc: migrate tail pages in zspage zram:...

...than page zsmalloc: clean up many BUG_ON zsmalloc: reordering function parameter zsmalloc: remove unused pool param in obj_free zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring 3. add non-lru page migration feature mm/compaction: support non-lru movable page migration 4. rework KVM memory-ballooning mm/ballo...

...than page zsmalloc: clean up many BUG_ON zsmalloc: reordering function parameter zsmalloc: remove unused pool param in obj_free zsmalloc: keep max_object in size_class zsmalloc: squeeze inuse into page->mapping zsmalloc: squeeze freelist into page->mapping zsmalloc: move struct zs_meta from mapping to freelist zsmalloc: factor page chain functionality out zsmalloc: separate free_zspage from putback_zspage zsmalloc: zs_compact refactoring 3. add non-lru page migration feature mm/compaction: support non-lru movable page migration 4. rework KVM memory-ballooning mm/ballo...