Random freezes with libata + ICH7 PATA

[Patrick Nagel <mail@patrick-nagel.net>]

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Hello,

I tried libata with my ICH7 PATA controller for some (five? seven?) days. 
During those days I experienced four random system freezes. I guess this 
message is not all that helpful - I have no idea what information I should 
have collected so it could be used for debugging. But at least now you know 
there is a problem at all. ;)
After switching back to the old IDE driver, the system runs stable again for 
three days or so, so it's not a sudden coincidental hardware problem.

Some details about my system (a Samsung R65 laptop, custom harddisk):

$ lspci | grep IDE
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller 
(rev 02)

$ dmesg | grep "hd[ab]: "
hda: HTS721010G9AT00, ATA DISK drive
hdb: DV-W28EA, ATAPI CD/DVD-ROM drive
hda: max request size: 512KiB
hda: 195371568 sectors (100030 MB) w/7539KiB Cache, CHS=16383/255/63, 
UDMA(100)
hda: cache flushes supported
 hda: hda1 hda2 hda3
hdb: ATAPI 24X DVD-ROM DVD-R-RAM CD-R/RW drive, 1419kB Cache, UDMA(33)

Kernel versions I tried (the problem appeared in both):
- 2.6.21 with CK patchset
- 2.6.21.5 with Gentoo patchset (http://dev.gentoo.org/~dsd/genpatches) 
(gentoo-sources-2.6.21-r3 package in Gentoo's repository)

There was no particularly heavy IDE load during the freezes.

If I can be of help with more information, please tell me what you need.

Patrick.

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