From: Changbin Du <[email protected]> These global variables are only set during initialization or rarely change, so declare them as __read_mostly.
Signed-off-by: Changbin Du <[email protected]> --- 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
