[lkml]   [2014]   [Feb]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] mm: per-thread vma caching
On Fri, 2014-02-21 at 10:13 -0800, Linus Torvalds wrote:
> On Thu, Feb 20, 2014 at 9:28 PM, Davidlohr Bueso <> wrote:
> > From: Davidlohr Bueso <>
> >
> > This patch is a continuation of efforts trying to optimize find_vma(),
> > avoiding potentially expensive rbtree walks to locate a vma upon faults.
> Ok, so I like this one much better than the previous version.

Btw, one concern I had is regarding seqnum overflows... if such
scenarios should happen we'd end up potentially returning bogus vmas and
getting bus errors and other sorts of issues. So we'd have to flush the
caches, but, do we care? I guess on 32bit systems it could be a bit more
possible to trigger given enough forking.


 \ /
  Last update: 2014-02-21 22:21    [W:0.086 / U:1.752 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site