* Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>:
> On Fri, 15 Jan 2010, Christoph Lameter wrote:
>
> > An allocated kmem_cache structure is definitely not in the range of the
> > kmalloc_caches array. This is basically checking if s is pointing to the
> > static kmalloc array.
>
> Check was wrong.. Sigh...
>
> ---
> mm/slub.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> Index: linux-2.6/mm/slub.c
> ===================================================================
> --- linux-2.6.orig/mm/slub.c 2010-01-19 12:50:20.000000000 -0600
> +++ linux-2.6/mm/slub.c 2010-01-19 12:51:30.000000000 -0600
> @@ -2148,7 +2148,8 @@ static int init_kmem_cache_nodes(struct
> int node;
> int local_node;
>
> - if (slab_state >= UP)
> + if (slab_state >= UP && (s < kmalloc_caches ||
> + s > kmalloc_caches + KMALLOC_CACHES))
> local_node = page_to_nid(virt_to_page(s));
> else
> local_node = 0;
Well, making progress (maybe?).
Now we're hitting a BUG_ON().
Interestingly, the machine now boots all the way to a login
prompt, whereas previously, it would simply hang.
/ac
kernel BUG at mm/slub.c:2839!
modprobe[6015]: bugcheck! 0 [1]
Modules linked in: sr_mod(+) button container(+) usbhid ohci_hcd ehci_hcd usbcore fan thermal processor thermal_sys
Pid: 6015, CPU 0, comm: modprobe
psr : 00001010085a6010 ifs : 8000000000000289 ip : [<a0000001001ae800>] Not tainted (2.6.33-rc3-next-20100111-dirty)
ip is at kfree+0xe0/0x260
unat: 0000000000000000 pfs : 0000000000000289 rsc : 0000000000000003
rnat: e0000786165b1720 bsps: aa99aaa6aa595999 pr : aa99aaa6aa565959
ldrs: 0000000000000000 ccv : 00000000000000c2 fpsr: 0009804c8a70433f
csd : 0000000000000000 ssd : 0000000000000000
b0 : a0000001001ae800 b6 : a0000001005e4360 b7 : a00000010046de40
f6 : 1003e0000000cb95d6936 f7 : 1003e0000000000000190
f8 : 1003e0000000cb95d67a6 f9 : 1003e0000000000000001
f10 : 100079cfffffffc583503 f11 : 1003e0000000000000000
r1 : a0000001014480f0 r2 : 00000000000017ec r3 : 000000000000fffe
r8 : 0000000000000021 r9 : 000000000000ffff r10 : ffffffffffff41ef
r11 : 0000000000000000 r12 : e0000786165bfdf0 r13 : e0000786165b0000
r14 : 00000000000017ec r15 : 0000000000004000 r16 : a00000010119c62c
r17 : a000000101265d70 r18 : 0000000000000000 r19 : a0000001005e4360
r20 : a0000001018edb38 r21 : 000000000000bdf3 r22 : 00000000000fffff
r23 : 0000000000100000 r24 : a000000102a3ddc8 r25 : a000000100a0dca8
r26 : a00000010046de40 r27 : a000000102a3ddc8 r28 : a000000102a3dec0
r29 : a000000100a0dc98 r30 : a00000010046dd80 r31 : a000000102a3ddc0
Call Trace:
[<a000000100016950>] show_stack+0x50/0xa0
sp=e0000786165bf9c0 bsp=e0000786165b1368
[<a0000001000171c0>] show_regs+0x820/0x860
sp=e0000786165bfb90 bsp=e0000786165b1310
[<a00000010003bc40>] die+0x1a0/0x300
sp=e0000786165bfb90 bsp=e0000786165b12d0
[<a00000010003bdf0>] die_if_kernel+0x50/0x80
sp=e0000786165bfb90 bsp=e0000786165b12a0
[<a00000010003d460>] ia64_bad_break+0x220/0x440
sp=e0000786165bfb90 bsp=e0000786165b1278
[<a00000010000c8a0>] ia64_native_leave_kernel+0x0/0x270
sp=e0000786165bfc20 bsp=e0000786165b1278
[<a0000001001ae800>] kfree+0xe0/0x260
sp=e0000786165bfdf0 bsp=e0000786165b1230
[<a000000207ce1df0>] sr_probe+0xad0/0xf20 [sr_mod]
sp=e0000786165bfdf0 bsp=e0000786165b11c8
[<a00000010048ab40>] driver_probe_device+0x180/0x300
sp=e0000786165bfe20 bsp=e0000786165b1190
[<a00000010048ada0>] __driver_attach+0xe0/0x140
sp=e0000786165bfe20 bsp=e0000786165b1160
[<a0000001004897a0>] bus_for_each_dev+0xa0/0x140
sp=e0000786165bfe20 bsp=e0000786165b1128
[<a00000010048a760>] driver_attach+0x40/0x60
sp=e0000786165bfe30 bsp=e0000786165b1108
[<a0000001004885c0>] bus_add_driver+0x180/0x520
sp=e0000786165bfe30 bsp=e0000786165b10c0
[<a00000010048b560>] driver_register+0x260/0x400
sp=e0000786165bfe30 bsp=e0000786165b1078
[<a0000001004df540>] scsi_register_driver+0x40/0x60
sp=e0000786165bfe30 bsp=e0000786165b1058
[<a000000207d10070>] init_sr+0x70/0x140 [sr_mod]
sp=e0000786165bfe30 bsp=e0000786165b1038
[<a00000010000a960>] do_one_initcall+0xe0/0x360
sp=e0000786165bfe30 bsp=e0000786165b0ff0
[<a000000100106040>] sys_init_module+0x1e0/0x4c0
sp=e0000786165bfe30 bsp=e0000786165b0f78
[<a00000010000c700>] ia64_ret_from_syscall+0x0/0x20
sp=e0000786165bfe30 bsp=e0000786165b0f78
[<a000000000010720>] __kernel_syscall_via_break+0x0/0x20
sp=e0000786165c0000 bsp=e0000786165b0f78
Disabling lock debugging due to kernel taint
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