[lkml]   [2015]   [May]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: "Directly mapped persistent memory page cache"
Ingo Molnar <> writes:

>> [...] support for atomicity (to avoid journaling in PM space), etc.
> This too should work fine, by way of the SMP coherency protocol, if
> atomic instructions are used on the relevant metadata.

This isn't true. Visibility and durability are two very different
things. That's what pcommit is all about. Search for it in this
document, if you aren't already familiar with it:

However, in the context of your page structures that are re-initialized
every boot, durability doesn't matter. So maybe that's what you were


 \ /
  Last update: 2015-05-11 17:21    [W:0.050 / U:2.560 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site