Alpha/2.6.4: Kernel bug at mm/page_alloc.c:752

Alpha/2.6.4: Kernel bug at mm/page_alloc.c:752

[Christian Vogel]

Hi,

I'm trying to get 2.6.4 running on a AlphaStation 250 4/266.
I get a BUG right after mounting the root filesystem,
Compiled using gcc-3.3.3, binutils from cvs[1]. 

Any ideas? You can get .config, system.map, serial console log here:
        http://www.hedonism.cx/~chris/bug_alpha/

        Chris

[1]: binutins from cvs, because older binutils segfault on linking.
        The bug also happened when using gcc-3.3.2 and latest release
        plus a simple patch against that segfault on linking

Kernel bug at mm/page_alloc.c:752
        ---> this is BUG_ON(!virt_addr_valid(addr));
swapper(1): Kernel Bug 1
pc = [<fffffc000034cfc4>]  ra = [<fffffc0000320bcc>]  ps = 0000    Not
tainted
Using defaults from ksymoops -t elf64-alpha -a alpha
v0 = 0000000000000000  t0 = 0000000000000000  t1 = fffffc00005d01d0
t2 = 0000000000000001  t3 = 0000000000000001  t4 = 0000000000000000
t5 = fffffc0007fe2ec0  t6 = 0000000000000001  t7 = fffffc0007f80000
a0 = fffffc000052c000  a1 = 0000000000000000  a2 = fffffc0007e37cc0
a3 = 0000000000000000  a4 = 0000000000000000  a5 = 000000000000001f
t8 = 0000000000000004  t9 = fffffc00003b37dc  t10= 0000000000000080
t11= 0000000000000020  pv = 0000000000000000  at = fffffc0000392d98
gp = fffffc00005cff80  sp = fffffc0007f83e28
Trace:fffffc0000320bcc fffffc0000320d2c fffffc0000310164
fffffc0000313018 
Code: 40200561  40200441  23bd2fe8  402b064c  c3ffffd0  00000081
<000002f0> 004e0745 


>>RA;  fffffc0000320bcc <free_reserved_mem+10c/240>

>>PC;  fffffc000034cfc4 <free_pages+144/1f0>   <=====

Trace; fffffc0000320bcc <free_reserved_mem+10c/240>
Trace; fffffc0000320d2c <free_initmem+2c/70>
Trace; fffffc0000310164 <init+44/130>
Trace; fffffc0000313018 <kernel_thread+28/90>

Code;  fffffc000034cfac <free_pages+12c/1f0>
0000000000000000 <_PC>:
Code;  fffffc000034cfac <free_pages+12c/1f0>
   0:   61 05 20 40       s4subq       t0,v0,t0
Code;  fffffc000034cfb0 <free_pages+130/1f0>
   4:   41 04 20 40       s4addq       t0,v0,t0
Code;  fffffc000034cfb4 <free_pages+134/1f0>
   8:   e8 2f bd 23       lda  gp,12264(gp)
Code;  fffffc000034cfb8 <free_pages+138/1f0>
   c:   4c 06 2b 40       s8addq       t0,s2,s3
Code;  fffffc000034cfbc <free_pages+13c/1f0>
  10:   d0 ff ff c3       br   ffffffffffffff54 <_PC+0xffffffffffffff54>
fffffc000034cf00 <free_pages+80/1f0>
Code;  fffffc000034cfc0 <free_pages+140/1f0>
  14:   81 00 00 00       call_pal     0x81
Code;  fffffc000034cfc4 <free_pages+144/1f0>   <=====
  18:   f0 02 00 00       call_pal     0x2f0   <=====
Code;  fffffc000034cfc8 <free_pages+148/1f0>
  1c:   45 07 4e 00       call_pal     0x4e0745

-- 
Christian Vogel -- chris@solarsystems.de

Re: Alpha/2.6.4: Kernel bug at mm/page_alloc.c:752

[Ivan Kokshaysky]

On Tue, Mar 30, 2004 at 11:00:48AM +0200, Christian Vogel wrote:
> I'm trying to get 2.6.4 running on a AlphaStation 250 4/266.
> I get a BUG right after mounting the root filesystem

It's a bug in the discontiguous memory support. I'll look into it
later today.
For now just disable CONFIG_DISCONTIGMEM. You don't need it on this
machine.

Ivan.