Re: AMD 760MPX DMA lockup (partly solved)

Jan Kasprzak (kas@informatics.muni.cz)
Fri, 13 Sep 2002 11:41:49 +0200

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In reply to: Alan Cox: "Re: AMD 760MPX DMA lockup (partly solved)"

Alan Cox wrote:
: On Thu, 2002-09-12 at 20:14, Jan Kasprzak wrote:
: > I the bug got merged from the -ac kernels, because it is
: > present bot in the kernel 2.4.19-11 from RedHat "null" beta
: > and in 2.4.20-pre2-ac1 (altough the later crashes instead of lock-up).
:
: That would strange actually. The Red Hat beta kernel has 2.4.18 like IDE
: not -ac like IDE
:
Well, it is probably not IDE-related at all, but rather it has
something to do with PCI or may be scheduling changes that -pre2-ac2 does.
Currently I positively know that 2.4.20-pre2 works, but 2.4.20-ac2 and
2.4.20-pre5 does not. I have tested 2.4.20-pre2-ac1 and 2.4.20-pre[34],
but all these does not work for me probably for some other reason.

So I have taken patch-2.4.20-pre2-ac2, and deleted all
changes except the ones that are IDE-related, and 2.4.20-pre2 plus the
following parts of -pre2-ac2 works:

I have to delete the first chunk of the patch of
include/asm-i386/ide.h, and I have deleted the call to
pci_enable_device_bars() in drivers/ide/ide-pci.c to be able to compile
this, but other than that it is exactly the same as 2.4.20-pre2-ac2 IDE code.
I will send you this as a patch against 2.4.20-pre2 if you want.

This still works, so it means the problem has to be in some other
part of 2.4.20-pre2-ac2.

Vojtech Pavlik wrote:
:
: X33? X33 doesn't make sense.
:
X34, sorry. DMA 33.

-Y.

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
|----------- If you want the holes in your knowledge showing up -----------|
|----------- try teaching someone.                  -- Alan Cox -----------|
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In reply to: Alan Cox: "Re: AMD 760MPX DMA lockup (partly solved)"