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    SubjectRe: libata + siI3112 + 2.6.5-rc3 hang
    Andrew Morton wrote:
    > CaT <cat@zip.com.au> wrote:
    >
    >>Here's the patch that Joe sent me. It doesn't apply cleanly mainly due
    >> to formatting errors in the patch but a bit of manual fixerupping made
    >> it all apply.
    >>
    >> --- 8< ---
    >> --- linux-2.6.4-orig/arch/i386/pci/fixup.c 2004-03-11
    >> 03:55:36.000000000 +0100
    >> +++ linux-2.6.4/arch/i386/pci/fixup.c 2004-03-16 13:12:25.706569480 +0100
    >> @@ -187,6 +187,22 @@
    >> dev->transparent = 1;
    >> }
    >>
    >> +/*
    >> + * Halt Disconnect and Stop Grant Disconnect (bit 4 at offset 0x6F)
    >> + * must be disabled when APIC is used (or lockups will happen).
    >> + */
    >
    >
    > I had this in -mm for a while. Ended up dropping it because it made some
    > people's CPUs run warmer and because it "wasn't the right fix".
    >
    > Does anyone know what the right fix is? If not, it seems that a warm CPU
    > is better than a non-functional box. Maybe enable it via a boot option?

    Ross' C1halt idle patch is the right thing to take. No fix, but stable
    work-around.

    Prakash
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