Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-R1 | From | Alan Cox <> | Date | Wed, 08 Sep 2004 23:31:08 +0100 |
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On Mer, 2004-09-08 at 21:33, Mark_H_Johnson@raytheon.com wrote: > >.... Please disable IDE DMA and see > >what happens (after hiding the PIO IDE codepath via > >touch_preempt_timing()). > > Not quite sure where to add touch_preempt_timing() calls - somewhere in the > loop in ide_outsl and ide_insl? [so we keep resetting the start /end > times?]
If you haven't done hdparm -u1 that may be a reason you want to touch these. To defend against some very bad old h/w where a stall in the I/O stream to the disk causes corruption we disable IRQ's across the transfer in PIO mode by default.
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