lkml.org 
[lkml]   [2008]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes
    Ingo Molnar wrote:
    > * Andreas Herrmann3 <andreas.herrmann3@amd.com> wrote:
    >
    >> For the failed devices I get:
    >>
    >> sata_sil 0000:00:12.0: version 2.3
    >> ACPI: PCI Interrupt 0000:00:12.0[A] -> GSI 22 (level, low) -> IRQ 22
    >> ioremap_nocache: addr c0403000, size 200
    >> swapper:1 conflicting cache attribute c0403000-c0404000 uncached<->default
    >> ACPI: PCI interrupt for device 0000:00:12.0 disabled
    >
    > hm, is the problem that the two devices share the same physical page,
    > and thus get an overlapping area?
    >
    > as an intermediate fix, how about following the attribute of the already
    > existing mapping, instead of rejecting the ioremap due to the conflict?
    > I.e. something like below?

    The correct behaviour probably would be to go with the most restrictive
    caching behaviour, i.e. uncached in this case.

    -hpa


    \
     
     \ /
      Last update: 2008-01-17 21:47    [W:0.038 / U:0.488 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site