Bug#404148: kernel: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping
Hi Steve.
As I've told you in my email before I just tested your patch with the
following results (used linux-source-2.6.18 (2.6.18.dfsg.1-12) from
testing, of course on an amd64 system):
- The patch applies without problems
- The kernel compiles with it without problems (at least with my config)
- It boots correctly
- and it automatically disables the hardware iommu (look at my dmesg below):
Bootdata ok (command line is root=/dev/sda1 ro snd-ice1724.index=0
snd-intel8x0.index=1 )
Linux version 2.6.18debtest (Version:) (calestyo@euler) (gcc version
4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP PREEMPT Sat Mar 31
00:42:51 CEST 2007
BIOS-provided physical RAM map:
....
....
Normal zone: 387840 pages, LIFO batch:31
Nvidia board detected. Ignoring ACPI timer override.
Looks like an nvidia chipset. Disabling HW IOMMU. Override with
"iommu=allowed"
ACPI: PM-Timer IO Port: 0x8008
....
....
CPU 0: aperture @ ac000000 size 64 MB
CPU 1: aperture @ ac000000 size 64 MB
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
Placing software IO TLB between 0x1650000 - 0x5650000
Memory: 4036552k/5767168k available (3007k kernel code, 156324k
reserved, 1245k data, 216k init)
Calibrating delay using timer specific routine.. 4422.28 BogoMIPS
(lpj=2211140)
Security Framework v1.0.0 initialized
....
....
So you see later on the kernel correctly reports to use the swiotlb.
I would say (although I'm by any means not kernel expert) that your
patch looks good and I _strongly_ recommend to include it in etch r0 (!!)...
You're the release manager,... so you should get managed this :-)
But I would say that you should add some notes to the release notes.
btw: I've CC'ed the mail to Andy so if you don't have time to do this he
might... uh and for Andy: have you already signed the etch release key
and did you have found some time to sign my personal key I gave you on
the last Stammtisch?!
Best wishes,
Chris.
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fn:Mitterer, Christoph Anton
n:Mitterer;Christoph Anton
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