My fault
I accidentally replaced a PAGE_MASK with a PAGE_SIZE.
the resulting bug only changes teh behaviour on unaligned pages
which are only possible on the raw device.
(e.g. fsck)
the Cyrix 5530 we used to test has a bug where we cannot do unalligned
transfers by DMA anyhow, so we never hit this bug..
fixed in -current ....
will be fixxed in -stable when I reintroduce the patch...
julian
On Thu, 22 Jul 1999 [EMAIL PROTECTED] wrote:
> > I'm experiencing serious problems with DMA (even normal DMA, not UDMA)
> > on recent versions of -STABLE. Here's an excerpt from messages; kernel
> > #3 is a recent -STABLE (yesterday's sources), while kernel #2 is
> > 3.2-RELEASE. The config file for both is identical.
>
> I can confirm problems with DMA from IDE disks in -STABLE. The problems
> seem to have been introduced in
>
> $Id: ide_pci.c,v 1.28.2.1 1999/07/20 22:58:20 julian Exp $
>
> And the effect for me is that the system stops in singleuser mode, with
> a "DMA failure" message. This is on a 440BX/PII-350 system.
>
> Reverting to 1.28 (from 17. January 1999) fixes the problems.
>
> Please back out 1.28.2.1, at least in -STABLE.
>
> Steinar Haug, Nethelp consulting, [EMAIL PROTECTED]
>
>
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