Re: 2.4.21 IDE problems (lost interrupt, bad DMA status)

From: Edward King (
Date: Tue Jul 01 2003 - 08:13:34 EST

Marek Michalkiewicz wrote:

>After upgrading the kernel from 2.4.20 to 2.4.21, sometimes I see
>the following messages:
>hda: dma_timer_expiry: dma status == 0x24
>hda: lost interrupt
>hda: dma_intr: bad DMA status (dma_stat=30)
>hda: dma_intr: status=0x50 { DriveReady SeekComplete }
>It happens especially when there is a lot of disk I/O (which stops
>for a few seconds when these messages appear), with three different
>disks (very unlikely they all decided to die at the same time...),

Are you using software raid or devfs?

I was losing interrupts and disabling devfs removed the problem (very
reproducable with software raid 5 -- never really tried much heavy disk
use without raid.)

Edward King

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Mon Jul 07 2003 - 22:00:12 EST