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    SubjectRe: [PATCH] floppy: revert floppy disable halt warning
    On Wed, 28 Mar 2012 00:20:46 -0700
    "H. Peter Anvin" <> wrote:

    > On 03/27/2012 11:40 PM, Ingo Molnar wrote:
    > >
    > > No objections from me.
    > >
    > > Please resubmit against latest -tip, we unified the idle
    > > routines which likely interacts with that patch.
    > >
    > To the best of my knowledge, no-hlt only existed because of flaky power
    > distributions on 386/486 systems which were sold to run DOS. Since DOS
    > did no power management of any kind, including HLT, the power draw was
    > fairly uniform; when exposed to the much higher noise levels you got
    > when Linux used HLT caused some of these systems to fail.

    Also for the Cyrix 5510 which tended to go castors up if a HLT occurred
    during a DMA cycle and on a few other boxes HLT during DMA tended to go

    Do we care ? I doubt it. The 5510 was pretty obscure, the 5520 fixed it,
    the 5530 is probably the oldest still in any kind of use.


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