linux-kernel - Re: [PATCH -v3 0/7] x86: Use BRK to pre mapping page table to make xen happy

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Date:	Wed, 7 Nov 2012 20:40:44 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jacob Shin <jacob.shin@....com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v3 0/7] x86: Use BRK to pre mapping page table to make
 xen happy

On Wed, Nov 07, 2012 at 11:11:44AM -0500, Konrad Rzeszutek Wilk wrote:
> On Mon, Nov 05, 2012 at 12:25:12PM -0800, Yinghai Lu wrote:
> > On Sat, Nov 3, 2012 at 2:37 PM, H. Peter Anvin <hpa@...or.com> wrote:
> > > I am travelling at the moment... I hope to be able to look at it Sunday.
> > >>
> > >>can you put for-x86-mm-test to tip for more testing?
> > >>
> > >>or you want to rebase the whole patchset?
> > 
> > All,
> > 
> > please check branch that is rebased on top of 3.7-rc4.
> > git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
> > for-x86-mm
> 
> I did a overnight test and it passed that. Let me do a couple of more of bootups
> with various memory configurations (1GB, 2GB, 3333M, 4G, 8GB, 16GB, 32GB) to
> get a good feel.

I ran in a problem with launching an 8GB guest. When launching a 4GB it worked
fine, but with 8GB I get:

.000000] init_memory_mapping: [mem 0x1f4000000-0x1f47fffff]
[    0.000000]  [mem 0x1f4000000-0x1f47fffff] page 4k
[    0.000000] memblock_reserve: [0x000001f311c000-0x000001f311d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311b000-0x000001f311c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311a000-0x000001f311b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3119000-0x000001f311a000] alloc_low_pages+0x103/0x130
[    0.000000] Kernel panic - not syncing: initrd too large to handle, disabling initrd (348401664 needed, 524288 available)
[    0.000000] 
[    0.000000] Pid: 0, comm: swapper Not tainted 3.7.0-rc4upstream-00042-g1b66ccf #1
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff81633a5c>] panic+0xbf/0x1df
[    0.000000]  [<ffffffff81ac00e1>] setup_arch+0x728/0xb29
[    0.000000]  [<ffffffff81633c48>] ? printk+0x48/0x4a
[    0.000000]  [<ffffffff81aba897>] start_kernel+0x90/0x39e
[    0.000000]  [<ffffffff81aba356>] x86_64_start_reservations+0x131/0x136
[    0.000000]  [<ffffffff81abca38>] xen_start_kernel+0x546/0x548

Attaching the full log.

View attachment "8gb-pv-domu.log" of type "text/plain" (377900 bytes)