"Badness at kernel/irq/resend.c:70" on boot - via-pmu?

"Badness at kernel/irq/resend.c:70" on boot - via-pmu?

[Paul Collins]

Hi Linus,

I got the message below on boot with 2.6.23-rc2 on my PowerBook.

I've Cc'd some powerpc folks because via_pmu_interrupt is in the
Macintosh PMU driver.

Hmm, I just looked back in my logs and I also got that message with
commit 7a883eaf62f4b943ebec738ce3b0796c67ef5d32.  Before that I used
6c8dca5d53f95009d4fff00195bf38f277dc4366 and there was no badness
message logged by that one.  There's only about 480 commits between
those two, so I can bisect it if necessary.

The call traces differ, so here are both messages.

v2.6.23-rc2:

    ------------[ cut here ]------------
    Badness at kernel/irq/resend.c:70
    NIP: c0054ca4 LR: c0054c78 CTR: c00162b0
    REGS: c0473d80 TRAP: 0700   Not tainted  (2.6.23-rc2-g036acf4f)
    MSR: 00021032 <ME,IR,DR>  CR: 42000024  XER: 00000000
    TASK = c04451e0[0] 'swapper' THREAD: c0472000
    GPR00: 00000001 c0473e30 c04451e0 00000178 0000002f 00600000 c0480000 0000002f 
    GPR08: 000186a0 c0480000 0048002f 00000400 00000000 00000000 00000000 00000000 
    GPR16: 00000000 00000000 00000000 00000000 00000000 40900000 00d3bbc0 00000000 
    GPR24: c0444000 c0480000 c0480000 c043b81c 00000001 0000002f 00024408 c044b1bc 
    NIP [c0054ca4] check_irq_resend+0x5c/0xc0
    LR [c0054c78] check_irq_resend+0x30/0xc0
    Call Trace:
    [c0473e30] [c0054c78] check_irq_resend+0x30/0xc0 (unreliable)
    [c0473e50] [c00547d0] enable_irq+0x84/0xa8
    [c0473e60] [c0220fec] via_pmu_interrupt+0x3d8/0xac0
    [c0473e90] [c0053dfc] handle_IRQ_event+0x4c/0xa0
    [c0473eb0] [c0055250] handle_fasteoi_irq+0xac/0x100
    [c0473ec0] [c0006528] do_IRQ+0x68/0xa8
    [c0473ed0] [c000ffe8] ret_from_except+0x0/0x14
    --- Exception: 501 at cpu_idle+0x88/0xd0
        LR = cpu_idle+0x88/0xd0
    [c0473f90] [c00090bc] cpu_idle+0xcc/0xd0 (unreliable)
    [c0473fa0] [c0351f9c] rest_init+0x58/0x68
    [c0473fb0] [c04189a0] start_kernel+0x260/0x274
    [c0473ff0] [00003860] 0x3860
    Instruction dump:
    4e800421 801f0000 3d20c005 57cb052a 39295030 2f0b0400 7f804800 419e0030 
    3d20c048 800994e4 7c000034 5400d97e <0f000000> 2f800000 41be0048 38000001 


7a883eaf62f4b943ebec738ce3b0796c67ef5d32:

    ------------[ cut here ]------------
    Badness at kernel/irq/resend.c:70
    NIP: c0054bfc LR: c0054bd0 CTR: c00162b0
    REGS: effc3e60 TRAP: 0700   Not tainted  (2.6.23-rc1-g6cc0258f)
    MSR: 00021032 <ME,IR,DR>  CR: 48000084  XER: 20000000
    TASK = effc17f0[1] 'swapper' THREAD: effc2000
    GPR00: 00000001 effc3f10 effc17f0 00000178 0000002f 00000000 c0470000 0000002f 
    GPR08: 000186a0 c0470000 0048002f 00000000 82000022 00000000 00000000 00000000 
    GPR16: 00000000 00000000 00000000 00000000 00000000 40900000 00d3ad48 00000000 
    GPR24: c0443000 c0470000 effc2000 c043ef4c 00000001 0000002f 00024008 c044a1bc 
    NIP [c0054bfc] check_irq_resend+0x5c/0xc0
    LR [c0054bd0] check_irq_resend+0x30/0xc0
    Call Trace:
    [effc3f10] [c0054bd0] check_irq_resend+0x30/0xc0 (unreliable)
    [effc3f30] [c0054728] enable_irq+0x84/0xa8
    [effc3f40] [c0220e74] via_pmu_interrupt+0x3d8/0xac0
    [effc3f70] [c0430f28] via_pmu_start+0x168/0x190
    [effc3f80] [c04171e4] kernel_init+0xc8/0x284
    [effc3ff0] [c0010800] kernel_thread+0x44/0x60
    Instruction dump:
    4e800421 801f0000 3d20c005 57cb052a 39294f88 2f0b0400 7f804800 419e0030 
    3d20c047 800974e4 7c000034 5400d97e <0f000000> 2f800000 41be0048 38000001 


-- 
Paul Collins
Wellington, New Zealand

Dag vijandelijk luchtschip de huismeester is dood

Re: "Badness at kernel/irq/resend.c:70" on boot - via-pmu?

[Linus Torvalds]

On Sun, 5 Aug 2007, Paul Collins wrote:
> 
> I got the message below on boot with 2.6.23-rc2 on my PowerBook.

It's a debug message, I think we need to remove it. It's trying to figure 
out what goes wrong with one particular machine, and I probably shouldn't 
have merged it for mainline.

Ignore it, it will be gone soon enough, and it should happen just once per 
boot.

		Linus

Re: "Badness at kernel/irq/resend.c:70" on boot - via-pmu?

[Benjamin Herrenschmidt]

On Sat, 2007-08-04 at 21:41 -0700, Linus Torvalds wrote:
> 
> On Sun, 5 Aug 2007, Paul Collins wrote:
> > 
> > I got the message below on boot with 2.6.23-rc2 on my PowerBook.
> 
> It's a debug message, I think we need to remove it. It's trying to figure 
> out what goes wrong with one particular machine, and I probably shouldn't 
> have merged it for mainline.
> 
> Ignore it, it will be gone soon enough, and it should happen just once per 
> boot.

Actually, it's interesting as that irq shouldn't hit that path :-) Not
critical (won't break anything), but still something I'll look into just
in case it hides something bad.

Cheers,
Ben.