Subject: Re: next-20081023 x86_64 boot hang: int3

From: Hiroshi Shimamoto <[email-masked]>
Date: Thu, 23 Oct 2008 22:07:57 -0700

Randy Dunlap wrote:
> 2 out of 2 x86_64 SMP boots stop with:
> 
> calling  tcp_congestion_default+0x0/0x12 @ 1
> initcall tcp_congestion_default+0x0/0x12 returned 0 after 2 usecs
> Freeing unused kernel memory: 448k freed
> Write protecting the kernel read-only data: 4816k
> int3: 0000 [#1] SMP
> last sysfs file:
> CPU 2
> Modules linked in:
> Pid: 0, comm: events/0 Not tainted 2.6.27-next-20081023 #1
> RIP: 0010:[<ffffffff8078ba2b>]  [<ffffffff8078ba2b>] nmi_cpu_busy+0x1/0x15
> RSP: 0018:ffff88017faa7f80  EFLAGS: 00000086
> RAX: 00000000ffffffff RBX: ffff88027f60e000 RCX: ffff88017fa98000
> RDX: ffffffff807eb480 RSI: 0000000000000000 RDI: ffffffff807b9e5c
> RBP: ffff88017faa7f98 R08: 0000000000000000 R09: ffff88002802c768
> R10: 0000000000000000 R11: ffff88027e023e90 R12: 0000000000000002
> R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> FS:  0000000000000000(0000) GS:ffff88017fa32280(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process events/0 (pid: 0, threadinfo ffff88017fa8c000, task ffff88017fa98000)
> Stack:
>  ffffffff80257afe ffffffff8076d938 0000000000000000 ffff88017faa7fa8
>  ffffffff8021f1b0 ffff88017fa8de50 ffffffff8020cabb ffff88017fa8de50 <EOI>
>  ffff88017fa8ded8 ffff88027e023e90 0000000000000000 ffff88002802c768
> Call Trace:
>  <IRQ> <0> [<ffffffff80257afe>] ? generic_smp_call_function_interrupt+0x35/0xd7
>  [<ffffffff8021f1b0>] smp_call_function_interrupt+0x1f/0x2f
>  [<ffffffff8020cabb>] call_function_interrupt+0x6b/0x70
>  <EOI> <0> [<ffffffff80212659>] ? default_idle+0x2b/0x40
>  [<ffffffff8021287d>] ? c1e_idle+0xe5/0xec
>  [<ffffffff8057072f>] ? atomic_notifier_call_chain+0xf/0x11
>  [<ffffffff8020ad1d>] ? cpu_idle+0x48/0x66
>  [<ffffffff80568784>] ? start_secondary+0x177/0x17c
> Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
> RIP  [<ffffffff8078ba2b>] nmi_cpu_busy+0x1/0x15
>  RSP <ffff88017faa7f80>
> Kernel panic - not syncing: Fatal exception in interrupt
> 
> 
> Full boot log is at
> http://oss.oracle.com/~rdunlap/kerneltest/logs/netcon-5175.log
> and .config is at http://oss.oracle.com/~rdunlap/kerneltest/logs/kconfig-5175

Hi,

this patch will fix this issue.
http://marc.info/?l=linux-kernel&m=122482422513626&w=2

thanks,
Hiroshi Shimamoto