lkml.org 
[lkml]   [2010]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmas of a mergeable VMA


On Sun, 11 Apr 2010, Johannes Weiner wrote:
>
> Did you have something in mind that I missed?

Mostly that the corner cases will never matter, and I'd prefer to keep the
code simpler than to care deeply.

For example, the only case you'd see vm_ops->close() is for special device
mappings. It's true that they cannot have their vma's merged, but it's
also true that they (a) will seldom have anon_vma's anyway and (b) would
never get mapped very many times so that anon_vma merging would be an
issue.

In other words, it's a "don't care" situation, where to keep the code
simpler we just document that we don't care.

Linus


\
 
 \ /
  Last update: 2010-04-11 01:39    [W:0.170 / U:0.752 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site