lkml.org 
[lkml]   [2008]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 01 of 12] Core of mmu notifiers
On Sun, 27 Apr 2008, Andrea Arcangeli wrote:

> Talking about post 2.6.26: the refcount with rcu in the anon-vma
> conversion seems unnecessary and may explain part of the AIM slowdown
> too. The rest looks ok and probably we should switch the code to a
> compile-time decision between rwlock and rwsem (so obsoleting the
> current spinlock).

You are going to take a semphore in an rcu section? Guess you did not
activate all debugging options while testing? I was not aware that you can
take a sleeping lock from a non preemptible context.




\
 
 \ /
  Last update: 2008-04-28 22:37    [from the cache]
©2003-2011 Jasper Spaans