lkml.org 
[lkml]   [2017]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH V8 3/5] scsi: Align block queue to dma_get_cache_alignment()
    On Tue, Oct 17, 2017 at 04:05:40PM +0800, Huacai Chen wrote:
    > In non-coherent DMA mode, kernel uses cache flushing operations to
    > maintain I/O coherency, so scsi's block queue should be aligned to
    > ARCH_DMA_MINALIGN. Otherwise, If a DMA buffer and a kernel structure
    > share a same cache line, and if the kernel structure has dirty data,
    > cache_invalidate (no writeback) will cause data corruption.

    Looks fine to, and I like cleaning up the arcane 0x03 as wel.

    \
     
     \ /
      Last update: 2017-10-22 17:26    [W:3.318 / U:0.184 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site