Messages in this thread Patch in this message | | | From | changbin.du@intel ... | Subject | [PATCH] mm, swap_state.c: declare a few variables as __read_mostly | Date | Thu, 12 Oct 2017 17:59:09 +0800 |
| |
From: Changbin Du <changbin.du@intel.com>
These global variables are only set during initialization or rarely change, so declare them as __read_mostly.
Signed-off-by: Changbin Du <changbin.du@intel.com> --- mm/swap_state.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/swap_state.c b/mm/swap_state.c index ed91091..71e667d 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -35,13 +35,13 @@ static const struct address_space_operations swap_aops = { #endif }; -struct address_space *swapper_spaces[MAX_SWAPFILES]; -static unsigned int nr_swapper_spaces[MAX_SWAPFILES]; -bool swap_vma_readahead = true; +struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly; +static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly; +bool swap_vma_readahead __read_mostly = true; #define SWAP_RA_MAX_ORDER_DEFAULT 3 -static int swap_ra_max_order = SWAP_RA_MAX_ORDER_DEFAULT; +static int swap_ra_max_order __read_mostly = SWAP_RA_MAX_ORDER_DEFAULT; #define SWAP_RA_WIN_SHIFT (PAGE_SHIFT / 2) #define SWAP_RA_HITS_MASK ((1UL << SWAP_RA_WIN_SHIFT) - 1) -- 2.7.4
| |