[lkml]   [2017]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v3] mm: Add SLUB free list pointer obfuscation
On Fri, 7 Jul 2017, Kees Cook wrote:

> If we also added a >0 offset, that would make things even less
> deterministic. Though I wonder if it would make the performance impact
> higher. The XOR patch right now is very light.

There would be barely any performance impact if you keep the offset within
a cacheline since most objects start on a cacheline boundary. The
processor has to fetch the cacheline anyways.

 \ /
  Last update: 2017-07-07 19:07    [W:0.052 / U:1.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site