lkml.org 
[lkml]   [2014]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface
On 06/23/2014 01:06 PM, Andy Lutomirski wrote:
> Can the new vm_operation "name" be use for this? The magic "always
> written to core dumps" feature might need to be reconsidered.

One thing I'd like to avoid is an MPX vma getting merged with a non-MPX
vma. I don't see any code to prevent two VMAs with different
vm_ops->names from getting merged. That seems like a bit of a design
oversight for ->name. Right?

Thinking out loud a bit... There are also some more complicated but more
performant cleanup mechanisms that I'd like to go after in the future.
Given a page, we might want to figure out if it is an MPX page or not.
I wonder if we'll ever collide with some other user of vm_ops->name. It
looks fairly narrowly used at the moment, but would this keep us from
putting these pages on, say, a tmpfs mount? Doesn't look that way at
the moment.


\
 
 \ /
  Last update: 2014-06-23 23:01    [W:0.145 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site