Messages in this thread |  | | | Date | Fri, 6 Nov 2009 18:44:39 +0100 | | From | Andi Kleen <> | | Subject | Re: Subject: [RFC MM] mmap_sem scaling: Use mutex and percpu counter instead |
| |
On Fri, Nov 06, 2009 at 12:08:54PM -0500, Christoph Lameter wrote: > On Fri, 6 Nov 2009, Andi Kleen wrote: > > > Yes but all the major calls still take mmap_sem, which is not ranged. > > But exactly that issue is addressed by this patch!
Major calls = mmap, brk, etc.
Only for page faults, not for anything that takes it for write.
Anyways the better reader lock is a step in the right direction, but I have my doubts it's a good idea to make write really slow here.
-Andi -- ak@linux.intel.com -- Speaking for myself only.
|  |