Re: PROBLEM: ide-cd panic with faulty disk and DMA enabled (2.6.0-test9)

[Jens Axboe <axboe@suse.de>]

On Mon, Nov 10 2003, Jens Axboe wrote:
> On Mon, Nov 10 2003, Csaba Halasz wrote:
> > Hi!
> > 
> > I have a DVD+RW disk that crashes the kernel every time I try to
> > read a particular area using my DVD-ROM drive with DMA enabled.
> > (The writer unit can read it back without any problems though.)
> > 
> > IMHO the crash seems to be of a more general nature,
> > not related to DVD+RW.
> > 
> > Linux version 2.6.0-test9 (hcs@defiant) (gcc version 3.3 (Debian)) #1 Sun Nov 9 14:08:41 CET 2003
> > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> > NFORCE: IDE controller at PCI slot 0000:00:09.0
> > NFORCE: chipset revision 195
> > NFORCE: not 100%% native mode: will probe irqs later
> > AMD_IDE: Bios didn't set cable bits correctly. Enabling workaround.
> > AMD_IDE: Bios didn't set cable bits correctly. Enabling workaround.
> > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> > AMD_IDE: 0000:00:09.0 (rev c3) UDMA100 controller on pci0000:00:09.0
> >     ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hda:DMA, hdb:DMA
> >     ide1: BM-DMA at 0xb808-0xb80f, BIOS settings: hdc:DMA, hdd:DMA
> > hda: Maxtor 5T040H4, ATA DISK drive
> > hdb: _NEC DVD+RW ND-1100A, ATAPI CD/DVD-ROM drive
> > Using anticipatory io scheduler
> > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> > hdc: Maxtor 5T040H4, ATA DISK drive
> > hdd: MATSHITADVD-ROM SR-8586, ATAPI CD/DVD-ROM drive
> > ide1 at 0x170-0x177,0x376 on irq 15
> > end_request: I/O error, dev hdb, sector 0
> > hdb: ATAPI 40X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)
> > Uniform CD-ROM driver Revision: 3.12
> > end_request: I/O error, dev hdd, sector 0
> > hdd: ATAPI 123X DVD-ROM drive, 512kB Cache, UDMA(33)
> > hdd: media error (bad sector): status=0x51 { DriveReady SeekComplete Error }
> > hdd: media error (bad sector): error=0x34
> > end_request: I/O error, dev hdd, sector 7043320
> > Buffer I/O error on device hdd, logical block 880415
> > hdd: DMA timeout retry
> > hdd: timeout waiting for DMA
> > 
> > Unable to handle kernel paging request at virtual address ddff7f74
> >  printing eip:
> > c0249af6
> > *pde = 00076067
> > *pte = 1dff7000
> > Oops: 0000 [#1]
> > CPU:    0
> > EIP:    0060:[<c0249af6>]    Not tainted
> 
> Could you build the same kernel with CONFIG_DEBUG_INFO enabled, and then
> do a
> 
> # gdb vmlinux
> # l *0xc0249af6
> 
> for me? Thanks.

You even did so, further down. Sorry, should have paid more attention.
I'll take a look at it.

-- 
Jens Axboe