On Fri, Mar 26, 2010 at 08:12:26PM -0400, Jeff Garzik wrote: > 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 No, here is the output with ignore_hpa=1 on the command line. I also don't see any difference with it not on the command line. scsi0 : pata_via scsi1 : pata_via ata1: PATA max UDMA/33 cmd 0x1f0 ctl 0x3f6 bmdma 0xe400 irq 14 ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0xe408 irq 15 ata1.00: HPA detected: current 66055248, native 240121728 ata1.00: ATA-7: Maxtor 6Y120P0, YAR41BW0, max UDMA/133 ata1.00: 66055248 sectors, multi 16: LBA ata1.00: configured for UDMA/33 scsi 0:0:0:0: Direct-Access ATA Maxtor 6Y120P0 YAR4 PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 66055248 512-byte logical blocks: (33.8 GB/31.4 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sda3 sda: p3 size 236037312 exceeds device capacity, limited to end of disk sd 0:0:0:0: [sda] Attached SCSI disk ata2.01: ATAPI: PLEXTOR CD-R PX-W4012A, 1.06, max UDMA/33 ata2.01: configured for UDMA/33 scsi 1:0:1:0: CD-ROM PLEXTOR CD-R PX-W4012A 1.06 PQ: 0 ANSI: 5 ... VFS: Cannot open root device "1602" or unknown-block(22,2) Please append a correct "root=" boot option; here are the available partitions: 0800 33027624 sda driver: sd 0801 49391 sda1 0802 1992816 sda2 0803 30985416 sda3 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(22,2) -- David Fries <david@xxxxxxxxx> http://fries.net/~david/ (PGP encryption key available) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
