linux-kernel - Re: mmotm 2009-02-17-12-33 uploaded

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Date:	Wed, 18 Feb 2009 10:19:42 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	mm-commits@...r.kernel.org, akpm@...ux-foundation.org,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	tglx@...utronix.de, x86@...nel.org, oleg@...hat.com
Subject: Re: mmotm 2009-02-17-12-33 uploaded

On 18.2.2009 00:21, Jiri Slaby wrote:
> On 17.2.2009 21:33, akpm@...ux-foundation.org wrote:
>> The mm-of-the-moment snapshot 2009-02-17-12-33 has been uploaded to

This one:
kthreads-move-sched-realeted-initialization-from-kthreadd-context.patch

> Hi,
>
> I'm getting the page fault below everytime during bootup. This is how
> __task_rq_lock looks like:
> for (;;) {
> struct rq *rq;
> printk("CPU=%u %p %p %p %s\n", task_cpu(p), p,
> task_thread_info(p)->task,
> task_thread_info(p), p->comm);
> rq = task_rq(p);
> spin_lock(&rq->lock);
> if (likely(rq == task_rq(p)))
> return rq;
> spin_unlock(&rq->lock);
> }
>
> CPU=2303197184 ffff880012497d90 b8005f57df1d8948 ffffffff80262d0a
> migration/0
> BUG: unable to handle kernel paging request at 00000003cabbb780
> IP: [<ffffffff802399eb>] __sched_setscheduler+0x17b/0x4a0
> PGD 0
> Oops: 0000 [#1] SMP
> last sysfs file:
> CPU 0
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.29-rc5-mm1_64 #578
> RIP: 0010:[<ffffffff802399eb>] [<ffffffff802399eb>]
> __sched_setscheduler+0x17b/0x4a0
> RSP: 0018:ffff880012497cc0 EFLAGS: 00000086
> RAX: 0000000089480000 RBX: ffffffff80262d0a RCX: 00000000ffffffff
> RDX: 000000000000d7d7 RSI: 0000000000000046 RDI: ffffffff80835334
> RBP: ffff880012497d30 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000010180
> R13: 0000000000000000 R14: ffff880012497d90 R15: 0000000000010180
> FS: 0000000000000000(0000) GS:ffff880001007000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 00000003cabbb780 CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 0000000000000000 DR7: 0000000000000000
> Process swapper (pid: 1, threadinfo ffff880012496000, task
> ffff880012478000)
> Stack:
> 0000000000000000 ffff880012497dc0 ffff880012498270 ffffffff12478000
> 0000000000000000 ffffffff80262d0a ffff8800124980f0 0000000000000046
> 0000000000000246 ffff880012497d50 ffffffff806f1065 0000000000000000
> Call Trace:
> [<ffffffff80262d0a>] ? tick_check_broadcast_device+0x3a/0x70
> [<ffffffff80239d1b>] sched_setscheduler_nocheck+0xb/0x10
> [<ffffffff80256ad7>] kthread_create+0xe7/0x120
> [<ffffffff8023b820>] ? migration_thread+0x0/0x230
> [<ffffffff80262d0a>] ? tick_check_broadcast_device+0x3a/0x70
> [<ffffffff80262109>] ? tick_notify+0x369/0x410
> [<ffffffff807d9598>] ? migration_init+0x0/0x5c
> [<ffffffff805de278>] migration_call+0x376/0x4ed
> [<ffffffff807d9598>] ? migration_init+0x0/0x5c
> [<ffffffff807d95be>] migration_init+0x26/0x5c
> [<ffffffff807d9598>] ? migration_init+0x0/0x5c
> [<ffffffff8020904c>] do_one_initcall+0x3c/0x170
> [<ffffffff807d31c4>] ? native_smp_prepare_cpus+0x1c0/0x311
> [<ffffffff807ca559>] kernel_init+0x76/0x1bc
> [<ffffffff8020d8da>] child_rip+0xa/0x20
> [<ffffffff807ca4e3>] ? kernel_init+0x0/0x1bc
> [<ffffffff8020d8d0>] ? child_rip+0x0/0x20
> Code: 69 3a 00 49 8b 5e 08 4c 8b 45 08 48 8b 0b ba db 08 00 00 48 c7 c6
> e0 4a 6e 80 48 c7 c7 ce 99 6e 80 31 c0 e8 0b 69 3a 00 8b 43 18 <4c> 03
> 24 c5 80 b7 7b 80 4c 89 e7 e8 e5 97 3a 00 49 8b 5e 08 31
> RIP [<ffffffff802399eb>] __sched_setscheduler+0x17b/0x4a0
> RSP <ffff880012497cc0>
> CR2: 00000003cabbb780
> ---[ end trace 4eaa2a86a8e2da22 ]---

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