Re: kernel BUG at mm/page_alloc.c:796 (2.6.7-mm7)

[Jens Axboe]

On Fri, Jul 09 2004, Jürg Billeter wrote:
> Just built and installed 2.6.7-mm7 and on startup I get the following
> BUG message. config and lspci output to be found below. 2.6.7-mm6 didn't
> have this problem on my computer. I can provide more information if
> requested. Please CC me on reply.
> 
> kernel BUG at mm/page_alloc.c:796!
> invalid operand: 0000 [#1]
> PREEMPT
> Modules linked in: ds pcmcia_core freq_table nfs lockd sunrpc ohci_hcd
> e100 snd_intel8x0 snd_ac97_codec snd_pcm snd_timer snd_page_alloc
> snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore ehci_hcd
> uhci_hcd ipt_REJECT ipt_LOG ipt_MASQUERADE ip_nat_irc ip_nat_ftp
> iptable_nat
> ipt_state ip_conntrack_irc ip_conntrack_ftp ip_conntrack iptable_filter
> ip_tables ext3 jbd mbcache
> CPU:    0
> EIP:    0060:[<c0135581>]    Not tainted VLI
> EFLAGS: 00010256   (2.6.7-mm7-upkg1)
> EIP is at __free_pages+0x31/0x40
> eax: 00000000   ebx: f7faf2c0   ecx: c16e3d00   edx: 00000000
> esi: f7fb2900   edi: f7fb28c0   ebp: 00000001   esp: f799fd70
> ds: 007b   es: 007b   ss: 0068
> Process hald (pid: 2748, threadinfo=f799e000 task=f7891190)
> Stack: c015276d fffffff2 f7c02a64 00000000 f799fe18 f7c02a64 c0246a5a
> f799fea4
>        00007425 c0249dbe 00000020 f7fb2900 f7feda80 f7c1097c 00000246
> 00000000
>        00000020 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> Call Trace:
>  [<c015276d>] bio_uncopy_user+0x5d/0x90
>  [<c0246a5a>] blk_rq_unmap_user+0x3a/0x40
>  [<c0249dbe>] sg_io+0x23e/0x290
>  [<c024a260>] scsi_cmd_ioctl+0x1e0/0x390

You're not using 2.6.7-mm7 virgin, it has no BUG() at that line. Care to
fill in what code is around line 796 in mm/page_alloc.c?

-- 
Jens Axboe

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