lkml.org 
[lkml]   [2009]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 5/5] add ksm kernel shared memory driver.
On Mon, 20 Apr 2009 04:36:06 +0300
Izik Eidus <ieidus@redhat.com> wrote:

> Ksm is driver that allow merging identical pages between one or more
> applications in way unvisible to the application that use it.
> Pages that are merged are marked as readonly and are COWed when any
> application try to change them.

Breaks sparc64 and probably lots of other architectures:

mm/ksm.c: In function `try_to_merge_two_pages_alloc':
mm/ksm.c:697: error: `_PAGE_RW' undeclared (first use in this function)

there should be an official arch-independent way of manipulating
vma->vm_page_prot, but I'm not immediately finding it.

An alternative (and quite inferior) "fix" would be to disable ksm on
architectures which don't implement _PAGE_RW. That's most of them.



\
 
 \ /
  Last update: 2009-04-28 00:43    [W:0.083 / U:0.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site