Re: [2.6.25-rc5-mm1] BUG: spinlock bad magic early during boot

Andrew Morton
2008-03-13T00:05:28Z

On Thu, 13 Mar 2008 00:54:43 +0100
Tilman Schmidt <tilman@imap.cc> wrote:

> Am 11.03.2008 09:14 schrieb Andrew Morton:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc5/2.6.25-rc5-mm1/
>
> This still complains during startup:
>
> <6>[ 0.063442] Checking 'hlt' instruction... OK.
> <0>[ 0.068233] BUG: spinlock bad magic on CPU#0, swapper/0
> <0>[ 0.068996] lock: c2c19380, .magic: 00000000, .owner: swapper/0, .owner_cpu: 0
> <4>[ 0.069227] Pid: 0, comm: swapper Not tainted 2.6.25-rc5-mm1-testing #1
> <4>[ 0.069369] [spin_bug+124/135] spin_bug+0x7c/0x87
> <4>[ 0.069563] [_raw_spin_unlock+25/113] _raw_spin_unlock+0x19/0x71
> <4>[ 0.069752] [_spin_unlock+29/60] _spin_unlock+0x1d/0x3c
> <4>[ 0.069941] [mnt_want_write+98/136] mnt_want_write+0x62/0x88
> <4>[ 0.070131] [sys_mkdirat+134/214] sys_mkdirat+0x86/0xd6
> <4>[ 0.070322] [clean_path+22/74] ? clean_path+0x16/0x4a
> <4>[ 0.070558] [kfree+216/236] ? kfree+0xd8/0xec
> <4>[ 0.070793] [sys_mkdir+16/18] sys_mkdir+0x10/0x12
> <4>[ 0.070995] [do_name+274/435] do_name+0x112/0x1b3
> <4>[ 0.071184] [write_buffer+29/44] write_buffer+0x1d/0x2c
> <4>[ 0.071371] [flush_window+100/179] flush_window+0x64/0xb3
> <4>[ 0.071558] [unpack_to_rootfs+1580/2233] unpack_to_rootfs+0x62c/0x8b9
> <4>[ 0.071747] [populate_rootfs+32/265] populate_rootfs+0x20/0x109
> <4>[ 0.071995] [alternative_instructions+339/344] ? alternative_instructions+0x153/0x158
> <4>[ 0.072235] [start_kernel+835/853] start_kernel+0x343/0x355
> <4>[ 0.072422] [i386_start_kernel+8/10] i386_start_kernel+0x8/0xa
> <4>[ 0.072610] =======================
> <6>[ 0.072808] Unpacking initramfs... done
>
> System comes up fine, though. Not sure whom to CC.

Dave, methinks.

> Machine's a dual-core Pentium D running a 32 bit kernel.
> Let me know if you want me to provide more information or test anything.

I thought we already fixed this, actually. Maybe we just talked about it
a bit?