lkml.org 
[lkml]   [2009]   [Dec]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [RFC][PATCHSET] mremap/mmap mess
From
From: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Date: Tue, 8 Dec 2009 13:03:30 +0000 (GMT)

> That would impose some (unacceptable?) limits, and require some funny
> code to migrate the pages over to the new mm later (instead of
> relocating within the new mm as we do now).

I think this approach would create new failure cases that don't exist
now. Whether that's acceptable or not is another issue.

The forced page table move, and TLB+cache flush that goes along with
that, for every single compat task we get now on the other hand is not
acceptable :-)

I also think this page table move overhead is worse than the
non-swapability added by Al's approach.


\
 
 \ /
  Last update: 2009-12-08 22:11    [W:0.118 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site