[RFC] test_bit before clear files_struct bits

add test_bit() before clear close_on_exec and open_fds, by trace __clear_bit(), these 2 place are false in most times, we test it so that we don't need dirty cacheline, and we can win in most time. Signed-off-by: Yalin Wang --- fs/file.c | 5 +++-- 1 file changed, 3 insertions(+), 2

[RFC] test_bit before clear files_struct bits

add test_bit() before clear close_on_exec and open_fds, by trace __clear_bit(), these 2 place are false in most times, we test it so that we don't need dirty cacheline, and we can win in most time. Signed-off-by: Yalin Wang yalin.w...@sonymobile.com --- fs/file.c | 5 +++-- 1 file changed, 3