page_cluster 0 means "we don't want readahead" so in the case, let's skip the readahead detection logic.
Cc: "Huang, Ying" <[email protected]> Signed-off-by: Minchan Kim <[email protected]> --- include/linux/swap.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/swap.h b/include/linux/swap.h index 0f54b491e118..739d94397c47 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -427,7 +427,8 @@ extern bool has_usable_swap(void); static inline bool swap_use_vma_readahead(void) { - return READ_ONCE(swap_vma_readahead) && !atomic_read(&nr_rotate_swap); + return page_cluster > 0 && READ_ONCE(swap_vma_readahead) + && !atomic_read(&nr_rotate_swap); } /* Swap 50% full? Release swapcache more aggressively.. */ -- 2.7.4
