* reproducable lockup on changing DMA state (2.4.22, cmd649)
@ 2003-09-15 12:00 Pallai Roland
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From: Pallai Roland @ 2003-09-15 12:00 UTC (permalink / raw)
To: linux-kernel
changing DMA state (hdparm -d0/1) always lockups my system
(2.4.21/2.4.22) if another drive does heavy I/O on same channel in DMA
mode.. there's no problem if the another drive's in PIO mode or there's
no I/O..
the biggest problem, that the kernel itself tries to change DMA state
if DMA timeout occurs and it's lockups the system too.. I've a machine
with 28 IDE disks on plain CMD649 controllers, and lots of lockups
happens when a disk going to die soon.. :(
# kernel 2.4.22
# cmd649 ctrl
# maxtor, samsung, quantum disks, nevermind
--
DaP
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2003-09-15 12:00 reproducable lockup on changing DMA state (2.4.22, cmd649) Pallai Roland
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