On Tue, Sep 23, 2014 at 07:55:48PM +0900, Tetsuo Handa wrote:

Zefan Li wrote:

quoted

Tetsuo reported a hard-to-reproduce kernel crash on RHEL6, which happend

s/happend/happened/

quoted

@@ -1972,6 +1973,14 @@ static inline void memalloc_noio_restore(unsigned int flags)
 TASK_PFA_TEST(NO_NEW_PRIVS, no_new_privs)
 TASK_PFA_SET(NO_NEW_PRIVS, no_new_privs)
 
+TASK_PFA_TEST(SPREAD_PAGE, spread_page)
+TASK_PFA_SET(SPREAD_PAGE, spread_page)
+TASK_PFA_CLEAR(SPREAD_PAGE, spread_page)
+
+TASK_PFA_TEST(SPREAD_SLAB, spread_slab)
+TASK_PFA_SET(SPREAD_SLAB, spread_slab)
+TASK_PFA_CLEAR(SPREAD_SLAB, spread_slab)
+

I wonder how adding 3 macro lines differs from 3 inlined functions.
Personally, from LXR (source code browser) point of view, inlined functions
are more friendly than macros. Also, I wonder about the cost of extracting
macros in a file which is likely included by every file but referenced
by few files. Speak of SPREAD_PAGE and SPREAD_SLAB, they should be defined
as inlined functions in include/linux/cpuset.h rather than as macros in
include/linux/sched.h ?

I think sched.h is fine along w/ inlines for other flags but yeah we
might be better off just open-coding them.

Thanks.

-- 
tejun