On 2015/11/09, 04:56, "Tetsuo Handa" [off-list ref]
wrote:

There are many locations that do

 if (memory_was_allocated_by_vmalloc)
   vfree(ptr);
 else
   kfree(ptr);

but kvfree() can handle both kmalloc()ed memory and vmalloc()ed memory
using is_vmalloc_addr(). Unless callers have special reasons, we can
replace this branch with kvfree(). Please check and reply if you found
problems.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>

For Lustre part:
Reviewed-by: Andreas Dilger <redacted>

Cheers, Andreas
-- 
Andreas Dilger

Lustre Principal Engineer
Intel High Performance Data Division