[lkml]   [1998]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: 2.1.111: IDE DMA disabled?
    > So by just reading the IDE status register you'd essentally guarantee that
    > whatever DMA activity happened earlier will have completed as far as the
    > CPU is concerned.

    There are other implicit data races in any X86 code. I spent a fair chunk
    of my early 1.3.3x SMP work staring at strange output because of it. Notably
    the dirty bit on pages is updated by the hardware and no lock in the kernel
    will stop that occuring if we have ordering wrong anywhere. Dave was never
    totally convinced I even got 2.0 right


    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:43    [W:0.018 / U:41.380 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site