Messages in this thread | | | Subject | reproducable lockup on changing DMA state (2.4.22, cmd649) | From | Pallai Roland <> | Date | 15 Sep 2003 14:00:45 +0200 |
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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
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