lkml.org 
[lkml]   [2021]   [Jul]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: page pools, was Re: [PATCH v9 1/5] drm: Add a sharable drm page-pool implementation
On Wed, Jul 07, 2021 at 12:35:23PM -0700, John Stultz wrote:
> So, as Christian mentioned, on the TTM side it's useful, as they are
> trying to avoid TLB flushes when changing caching attributes.
>
> For the dmabuf system heap purposes, the main benefit is moving the
> page zeroing to the free path, rather than the allocation path. This
> on its own doesn't save much, but allows us to defer frees (and thus
> the zeroing) to the background, which can get that work out of the hot
> path.

I really do no think that is worth it to fragment the free pages.

\
 
 \ /
  Last update: 2021-07-08 06:23    [W:0.105 / U:3.652 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site