Messages in this thread | | | Date | Sun, 21 Aug 2005 16:47:28 +0200 | From | Bart Samwel <> | Subject | Re: DMA problem with kernel >2.6.10 |
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andrea gelmini wrote: > Hardware: Toshiba Satellite P20 (P4-3200 MHz, 512MB RAM) [1] > Software: Debian Unstable > GCC: 3.4.5 [2] > Memtest86+: v.1.60 (stress tools, CPU/RAM and so on, are all happy) > Problem: with kernel <=2.6.10 everything is all right... > but with any kernel released after 2.6.10 (pre, rc, stable, mm, and > so on), I've got this: > > hda: dma_timer_expiry: dma status == 0x21 > hda: DMA timeout error > hda: dma timeout error: status=0xd0 { Busy } [...] > It happen quickly if I do also something like this: > > cd /proc/sys/vm > echo 100 > dirty_background_ratio > echo 1000000 > dirty_expire_centisecs > echo 100 > dirty_ratio > echo 1000000 > dirty_writeback_centisecs
I've had a report about this before, from someone who was using laptop mode -- same error message. Funny thing is, the laptop mode tools scripts also modify the above values, so it's probably the same problem. Until now I thought it was a Thinkpad hardware problem, because I only heard about these problems on Thinkpads, but apparently it's a kernel problem after all. Don't know anything about the causes though.
--Bart - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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