Hi David, Thanks a lot for your deep review on this series. On 25/03/2018 23:50, David Rientjes wrote: > On Tue, 13 Mar 2018, Laurent Dufour wrote: > >> This configuration variable will be used to build the code needed to >> handle speculative page fault. >> >> By default it is turned off, and activated depending on architecture >> support. >> >> Suggested-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> >> Signed-off-by: Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx> >> --- >> mm/Kconfig | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/mm/Kconfig b/mm/Kconfig >> index abefa573bcd8..07c566c88faf 100644 >> --- a/mm/Kconfig >> +++ b/mm/Kconfig >> @@ -759,3 +759,6 @@ config GUP_BENCHMARK >> performance of get_user_pages_fast(). >> >> See tools/testing/selftests/vm/gup_benchmark.c >> + >> +config SPECULATIVE_PAGE_FAULT >> + bool > > Should this be configurable even if the arch supports it? Actually, this is not configurable unless by manually editing the .config file. I made it this way on the Thomas's request : https://lkml.org/lkml/2018/1/15/969 That sounds to be the smarter way to achieve that, isn't it ? Laurent.
