lkml.org 
[lkml]   [2002]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: PCI DMA to small buffers on cache-incoherent arch
    From
       From: David Brownell <david-b@pacbell.net>
    Date: Wed, 12 Jun 2002 22:13:17 -0700

    David S. Miller wrote:
    > We have two problems we want to solve, the DMA alignment stuff and
    > using consistent memory for these small buffers. Therefore moving to
    > consistent memory (by whatever mechanism the USB desires to implement
    > this) is the way to go.

    Right, the alignment stuff is a correctness issue, the consistent
    memory issue is a performance concern. I like to think that 2.5
    will have a lot less correctness issues in the USB stack, so it
    can start to pay more attention to performance concerns.

    I want to reemphasize that by going to consistent memory we solve
    both problems, in particular the alignment stuff becomes a non-issue.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:26    [W:4.469 / U:0.152 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site