On 03/26/2010 07:21 PM, David Fries wrote:
The kernel fails to see the entire disk with 2.6.34-rc2 with VIA
vt82c586b chipset. I tracked it down to commit
f931a5d5785d7b7c44871bd7ad2762e29dfddf29 "via82cxxx: workaround h/w
bugs" and reverting just that one solves the problem, or just
commenting out just one outb write in that change.
via82cxxx 0000:00:07.1: VIA vt82c586b (rev 41) IDE UDMA33
via82cxxx 0000:00:07.1: IDE controller (0x1106:0x0571 rev 0x06)
via82cxxx 0000:00:07.1: not 100% native mode: will probe irqs later
Note the kernel panic is intentional as I'm given the test kernel an
invalid root device, so that I can suspend to disk, try a kernel,
resume and pick up where I left off. It does have a side benefit of
dumping the size of all partitions.
2.6.34-rc2 unmodified, fails and sees 30985416 KiB for the last
partition.
ide-gd driver 1.18
hda: max request size: 128KiB
hda: 66055248 sectors (33820 MB) w/7936KiB Cache, CHS=65531/16/63
hda: cache flushes supported
hda: hda1 hda2 hda3
hda: p3 size 236037312 exceeds device capacity, enabling native capacity
hda: p3 size 236037312 exceeds device capacity, limited to end of disk
ide-cd driver 5.00
...
Please append a correct "root=" boot option; here are the available partitions:
0300 33027624 hda driver: ide-gd
0301 49391 hda1
0302 1992816 hda2
0303 30985416 hda3
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(22,2)
2.6.34-rc2 with patch revered, correct size 118018656
ide-gd driver 1.18
hda: max request size: 128KiB
hda: Host Protected Area detected.
current capacity is 66055248 sectors (33820 MB)
native capacity is 240121728 sectors (122942 MB)
hda: 66055248 sectors (33820 MB) w/7936KiB Cache, CHS=65531/16/63
hda: cache flushes supported
hda: hda1 hda2 hda3
hda: p3 size 236037312 exceeds device capacity, enabling native capacity
hda: detected capacity change from 33820286976 to 122942324736
ide-cd driver 5.00
0300 120060864 hda driver: ide-gd
0301 49391 hda1
0302 1992816 hda2
0303 118018656 hda3
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(22,2)
Here are two debug patches, the first adds debug prints and the second
disables the problematic write, I have the output of both included.
From dac7d14ce1f227d8a084c3ec218ea1430bffdc57 Mon Sep 17 00:00:00 2001
From: David Fries<david@xxxxxxxxx>
Date: Thu, 25 Mar 2010 19:51:31 -0500
Subject: [PATCH 1/2] fails: add print messages
add print messages for debugging
---
drivers/ide/via82cxxx.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
Does libata + pata_via work, if you pass ignore_hpa=1 module option to
libata?
Jeff
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