lkml.org 
[lkml]   [2014]   [May]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/4] x86,mm: Improve _install_special_mapping and fix x86 vdso naming
On Mon, May 19, 2014 at 03:58:33PM -0700, Andy Lutomirski wrote:
> Using arch_vma_name to give special mappings a name is awkward. x86
> currently implements it by comparing the start address of the vma to
> the expected address of the vdso. This requires tracking the start
> address of special mappings and is probably buggy if a special vma
> is split or moved.
>
> Improve _install_special_mapping to just name the vma directly. Use
> it to give the x86 vvar area a name, which should make CRIU's life
> easier.
>
> As a side effect, the vvar area will show up in core dumps. This
> could be considered weird and is fixable. Thoughts?
>
> Cc: Cyrill Gorcunov <gorcunov@openvz.org>
> Cc: Pavel Emelyanov <xemul@parallels.com>
> Signed-off-by: Andy Lutomirski <luto@amacapital.net>

Hi Andy, thanks a lot for this! I must confess I don't yet know how
would we deal with compat tasks but this is 'must have' mark which
allow us to detect vvar area!


\
 
 \ /
  Last update: 2014-05-20 20:01    [W:3.176 / U:0.248 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site