linux-kernel - Re: Panic on 8-node system in memblock_virt_alloc_try

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Message-ID: <CAE9FiQVy+8CF5qwnyL8YGzqwKOJF+y7N_+reAXWw7p8-BaVQPg@mail.gmail.com>
Date:	Fri, 24 Jan 2014 09:45:17 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Dave Hansen <dave.hansen@...el.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Panic on 8-node system in memblock_virt_alloc_try_nid()

On Fri, Jan 24, 2014 at 7:01 AM, Dave Hansen <dave.hansen@...el.com> wrote:
> There are two failure modes I'm seeing: one when (failing to) allocate
> the first node's mem_map[], and a second where it oopses accessing the
> numa_distance[] table.  This is the numa_distance[] one, and it happens
> even with the patch you suggested applied.
>
>> [    0.000000] memblock_find_in_range_node():239
>> [    0.000000] __memblock_find_range_top_down():150
>> [    0.000000] __memblock_find_range_top_down():152 i: 600000001
>> [    0.000000] memblock_find_in_range_node():241 ret: 2147479552
>> [    0.000000] memblock_reserve: [0x0000007ffff000-0x0000007ffff03f] flags 0x0 numa_set_distance+0xd2/0x252

that address is wrong.

Can you post whole log with current linus' tree + two patches that I
sent out yesterday?

>> [    0.000000] numa_distance phys: 7ffff000
>> [    0.000000] numa_distance virt: ffff88007ffff000
>> [    0.000000] numa_distance size: 64
>> [    0.000000] numa_alloc_distance() accessing numa_distance[] at byte: 0
>> [    0.000000] BUG: unable to handle kernel paging request at ffff88007ffff000
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