linux-kernel - Re: x86_64 panic on latest linux-2.6

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Date:	Sun, 25 May 2008 23:42:29 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Mariusz Kozlowski <m.kozlowski@...land.pl>
Cc:	kernel-testers@...r.kernel.org, linux-kernel@...r.kernel.org,
	Kay Sievers <kay.sievers@...y.org>,
	Greg Kroah-Hartman <gregkh@...e.de>, Neil Brown <neilb@...e.de>
Subject: Re: x86_64 panic on latest linux-2.6

On Sun, May 25, 2008 at 10:51:33AM +0200, Mariusz Kozlowski wrote:
> Hello,

Hi Mariusz,

> 	My x86_64 box is not willing to boot.
> 
> http://tuxland.pl/tmp/s7300372.jpg (275kB)
> 
> (gdb) p blk_lookup_devt
> $1 = {dev_t (const char *, int)} 0xffffffff8032a430 <blk_lookup_devt>
> (gdb) l *(0xffffffff8032a430+0x7f)
> 0xffffffff8032a4af is in blk_lookup_devt (block/genhd.c:664).
> 659             dev_t devt = MKDEV(0, 0);
> 660     
> 661             mutex_lock(&block_class_lock);
> 662             list_for_each_entry(dev, &block_class.devices, node) {
> 663                     if (strcmp(dev->bus_id, name) == 0) {
> 664                             struct gendisk *disk = dev_to_disk(dev);
> 665     
> 666                             if (part < disk->minors)
> 667                                     devt = MKDEV(MAJOR(dev->devt),
> 668                                                  MINOR(dev->devt) + part);
> (gdb) 

thanks for your report.

Does reverting of commit 30f2f0eb4bd2c43d10a8b0d872c6e5ad8f31c9a0
(block: do_mounts - accept root=<non-existant partition>) fix it?

> 	Mariusz
>...

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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