On 10/10/2017 10:25 AM, Ayush Mittal wrote: > Maximum page order can be at max 10 which can be accomodated > in short data type(2 bytes). > last_migrate_reason is defined as enum type whose values can > be accomodated in short data type (2 bytes). > > Total structure size is currently 16 bytes but after changing structure > size it goes to 12 bytes. > > Signed-off-by: Ayush Mittal <[email protected]>
Looks like it works, so why not. Before: [ 0.001000] allocated 50331648 bytes of page_ext After: [ 0.001000] allocated 41943040 bytes of page_ext Acked-by: Vlastimil Babka <[email protected]> > --- > mm/page_owner.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mm/page_owner.c b/mm/page_owner.c > index 0fd9dcf..4ab438a 100644 > --- a/mm/page_owner.c > +++ b/mm/page_owner.c > @@ -19,9 +19,9 @@ > #define PAGE_OWNER_STACK_DEPTH (16) > > struct page_owner { > - unsigned int order; > + unsigned short order; > + short last_migrate_reason; > gfp_t gfp_mask; > - int last_migrate_reason; > depot_stack_handle_t handle; > }; > >
