[lkml]   [2017]   [Oct]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC] mmap(MAP_CONTIG)
On Tue, Oct 03 2017, Mike Kravetz wrote:
> At Plumbers this year, Guy Shattah and Christoph Lameter gave a presentation
> titled 'User space contiguous memory allocation for DMA' [1]. The slides
> point out the performance benefits of devices that can take advantage of
> larger physically contiguous areas.

Issue I have is that kind of memory needed may depend on a device. Some
may require contiguous blocks. Some may support scatter-gather. Some
may be behind IO-MMU and not care either way.

Furthermore, I feel déjà vu. Wasn’t dmabuf supposed to address this

Best regards
ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ
«If at first you don’t succeed, give up skydiving»

 \ /
  Last update: 2017-10-04 13:54    [W:0.252 / U:0.040 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site