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    SubjectRe: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt

    Rob Landley wrote:

    >On Thursday 06 November 2003 13:45, Linus Torvalds wrote:
    >>On 6 Nov 2003, bill davidsen wrote:
    >>>I'm not sure what you mean by faster, burning runs at device limited
    >>>speed in CPU time in the less than 1% range if you remember to enable
    >>>DMA. The last time I looked DMA didn't work in either kernel if write
    >>>size was not a multiple of 1k, (or 2k?) has that changed?
    >>DMA works fine
    >>Don't use it. Please. There's no point.
    >>It's much more readable to do
    >> cdrecord dev=/dev/hdc
    >>than it is to do some stupid "scan SCSI devices" + "dev=0,1,0" or similar
    >>totally incomprehensible crap that doesn't even work right.
    >>>I'm not sure what you meant by faster, so don't think I'm disagreeing
    >>>with you.
    >>Faster as in "it uses DMA for everything, so you can actually burn at full
    >>speed without having to worry about it or sucking up CPU".
    >> Linus
    >Note this still doesn't mean you can scroll large X windows for two or three
    >seconds at a time without burning a coaster.
    >I had high hopes with the new scheduler, but no. (Maybe if I niced the heck
    >out of cdrecord...)

    RT processes should work well with the scheduler. renicing if it is not
    RT will help a little bit, but it doesn't do much to help maximum latency.

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