[lkml]   [2016]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/2] dax: move writeback calls into the filesystems
On Mon, Feb 8, 2016 at 12:58 PM, Jeff Moyer <> wrote:
> Dan Williams <> writes:
>> I agree the mount option needs to die, and I fully grok the reasoning.
>> What I'm concerned with is that a system using fully-DAX-aware
>> applications is forced to incur the overhead of maintaining *sync
>> semantics, periodic sync(2) in particular, even if it is not relying
>> on those semantics.
>> However, like I said in my other mail, we can solve that with
>> alternate interfaces to persistent memory if that becomes an issue and
>> not require that "disable *sync" capability to come through DAX.
> What do you envision these alternate interfaces looking like?

Well, plan-A was making DAX be explicit opt-in for applications, I
haven't thought too much about plan-B. I expect it to be driven by
real performance numbers and application use cases once the *sync
compat work completes.

 \ /
  Last update: 2016-02-08 23:21    [W:0.083 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site