Messages in this thread | | | Date | Thu, 21 Oct 2004 18:11:01 +0200 | From | Jens Axboe <> | Subject | Re: readcd hangs in blk_execute_rq |
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On Thu, Oct 21 2004, Meelis Roos wrote: > > > And here it hangs. ps shows readcd is in D state, in blk_execute_rq. > > > dmesg shows lines of > > > > > > hdc: lost interrupt > > Meanwhile I found out that if I eject the CD by pressing button, it > resumes its work and reports error to the user process. > > > > ide-cd: cmd 0x28 timed out > > > hdc: DMA interrupt recovery > > > hdc: lost interrupt > > > hdc: status timeout: status=0xd0 { Busy } > > > hdc: status timeout: error=0x00 > > > hdc: DMA disabled > > > hdc: drive not ready for command > > > hdc: ATAPI reset complete > > > > Did it previously work reliably with dma (which kernel)? Does it now > > work reliably without dma now? Do send your entire dmesg after a boot > > too, btw. > > It worked in earlier 2.4 kernels (2.4.18?) with DMA - I don't remember > if it had some reliability problems. Since then, it's no dma. We have 3 > such computers here (Intel D816EEA2 mainboard, this specific Sony CDrom) > and they all behave the same.
2.4.x never used dma for this operation. Does 2.6.9 work if you turn off dma first?
-- Jens Axboe
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