lkml.org 
[lkml]   [2016]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: DAX mapping detection (was: Re: [PATCH] Fix region lost in /proc/self/smaps)
    On Thu, Sep 08, 2016 at 04:56:36PM -0600, Ross Zwisler wrote:
    > I think this goes back to our previous discussion about support for the PMEM
    > programming model. Really I think what NVML needs isn't a way to tell if it
    > is getting a DAX mapping, but whether it is getting a DAX mapping on a
    > filesystem that fully supports the PMEM programming model. This of course is
    > defined to be a filesystem where it can do all of its flushes from userspace
    > safely and never call fsync/msync, and that allocations that happen in page
    > faults will be synchronized to media before the page fault completes.

    That's a an easy way to flag: you will never get that from a Linux
    filesystem, period.

    NVML folks really need to stop taking crack and dreaming this could
    happen.

    \
     
     \ /
      Last update: 2016-09-17 09:59    [W:5.614 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site