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References: <20150408165920.25007.6869.stgit@buzz> <55255F84.6060608@yandex-team.ru>
From: Julian Calaby <julian.calaby@gmail.com>
Date: Thu, 9 Apr 2015 09:12:49 +1000
Message-ID: <CAGRGNgUseiLaKz+iPoe7U73HEu22durZjxROu-NE0EZcThhysA@mail.gmail.com>
Subject: Re: [PATCH] of: return NUMA_NO_NODE from fallback of_node_to_nid()
To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Grant Likely <grant.likely@linaro.org>,
        devicetree <devicetree@vger.kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        sparclinux <sparclinux@vger.kernel.org>, linux-mm@kvack.org,
        linuxppc-dev@lists.ozlabs.org
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Hi Konstantin,

On Thu, Apr 9, 2015 at 3:04 AM, Konstantin Khlebnikov
<khlebnikov@yandex-team.ru> wrote:
> On 08.04.2015 19:59, Konstantin Khlebnikov wrote:
>>
>> Node 0 might be offline as well as any other numa node,
>> in this case kernel cannot handle memory allocation and crashes.
>
>
> Example:
>
> [    0.027133] ------------[ cut here ]------------
> [    0.027938] kernel BUG at include/linux/gfp.h:322!
> [    0.028000] invalid opcode: 0000 [#1] SMP
> [    0.028000] Modules linked in:
> [    0.028000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc7 #12
> [    0.028000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014
> [    0.028000] task: ffff88007d3f8000 ti: ffff88007d3dc000 task.ti:
> ffff88007d3dc000
> [    0.028000] RIP: 0010:[<ffffffff8118574c>]  [<ffffffff8118574c>]
> new_slab+0x30c/0x3c0
> [    0.028000] RSP: 0000:ffff88007d3dfc28  EFLAGS: 00010246
> [    0.028000] RAX: 0000000000000000 RBX: ffff88007d001800 RCX:
> 0000000000000001
> [    0.028000] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
> 00000000002012d0
> [    0.028000] RBP: ffff88007d3dfc58 R08: 0000000000000000 R09:
> 0000000000000000
> [    0.028000] R10: 0000000000000001 R11: ffff88007d02fe40 R12:
> 00000000000000d0
> [    0.028000] R13: 00000000000000c0 R14: 0000000000000015 R15:
> 0000000000000000
> [    0.028000] FS:  0000000000000000(0000) GS:ffff88007fc00000(0000)
> knlGS:0000000000000000
> [    0.028000] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [    0.028000] CR2: 00000000ffffffff CR3: 0000000001e0e000 CR4:
> 00000000000006f0
> [    0.028000] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [    0.028000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [    0.028000] Stack:
> [    0.028000]  0000000000000000 ffff88007fc175d0 ffffea0001f40bc0
> 00000000000000c0
> [    0.028000]  ffff88007d001800 00000000000080d0 ffff88007d3dfd48
> ffffffff8192da27
> [    0.028000]  000000000000000d ffffffff81e27038 0000000000000000
> 0000000000000000
> [    0.028000] Call Trace:
> [    0.028000]  [<ffffffff8192da27>] __slab_alloc+0x3df/0x55d
> [    0.028000]  [<ffffffff8109a92b>] ? __lock_acquire+0xc1b/0x1f40
> [    0.028000]  [<ffffffff810b1f2c>] ? __irq_domain_add+0x3c/0xe0
> [    0.028000]  [<ffffffff810998f5>] ? trace_hardirqs_on_caller+0x105/0x1d0
> [    0.028000]  [<ffffffff813631ab>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> [    0.028000]  [<ffffffff811890ab>] __kmalloc_node+0xab/0x210
> [    0.028000]  [<ffffffff810394df>] ? ioapic_read_entry+0x1f/0x50
> [    0.028000]  [<ffffffff810b1f2c>] ? __irq_domain_add+0x3c/0xe0
> [    0.028000]  [<ffffffff810b1f2c>] __irq_domain_add+0x3c/0xe0
> [    0.028000]  [<ffffffff81039e0e>] mp_irqdomain_create+0x9e/0x120
> [    0.028000]  [<ffffffff81f22d49>] setup_IO_APIC+0x6b/0x798
> [    0.028000]  [<ffffffff810398a5>] ? clear_IO_APIC+0x45/0x70
> [    0.028000]  [<ffffffff81f21f01>] apic_bsp_setup+0x87/0x96
> [    0.028000]  [<ffffffff81f1fdb4>] native_smp_prepare_cpus+0x237/0x275
> [    0.028000]  [<ffffffff81f131b7>] kernel_init_freeable+0x120/0x265
> [    0.028000]  [<ffffffff819271f9>] ? kernel_init+0x9/0xf0
> [    0.028000]  [<ffffffff819271f0>] ? rest_init+0x130/0x130
> [    0.028000]  [<ffffffff819271f9>] kernel_init+0x9/0xf0
> [    0.028000]  [<ffffffff8193b958>] ret_from_fork+0x58/0x90
> [    0.028000]  [<ffffffff819271f0>] ? rest_init+0x130/0x130
> [    0.028000] Code: 6b b6 ff ff 49 89 c5 e9 ce fd ff ff 31 c0 90 e9 74 ff
> ff ff 49 c7 04 04 00 00 00 00 e9 05 ff ff ff 4c 89 e7 ff d0 e9 d9 fe ff ff
> <0f> 0b 4c 8b 73 38 44 89 e7 81 cf 00 00 20 00 4c 89 f6 48 c1 ee
> [    0.028000] RIP  [<ffffffff8118574c>] new_slab+0x30c/0x3c0
> [    0.028000]  RSP <ffff88007d3dfc28>
> [    0.028039] ---[ end trace f03690e70d7e4be6 ]---

Shouldn't this be in the commit message?

Thanks,

-- 
Julian Calaby

Email: julian.calaby@gmail.com
Profile: http://www.google.com/profiles/julian.calaby/
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