linux-kernel - Re: [PATCH -v2 00/10] x86: Use BRK to pre mapping page table to make xen happy

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Date:	Tue, 9 Oct 2012 11:27:22 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Jacob Shin <jacob.shin@....com>,
	Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v2 00/10] x86: Use BRK to pre mapping page table to make
 xen happy

On Tue, Oct 9, 2012 at 5:19 AM, Stefano Stabellini
<stefano.stabellini@...citrix.com> wrote:
>
> I agree with Peter that this series is going in the right direction.
> However if I give more than 4G of RAM to the VM I get a panic at boot:
>
> [    0.000000] Linux version 3.6.0-rc7+ (sstabellini@...2) (gcc version 4.4.5 (Debian 4.4.5-8) ) #532 SMP Tue Oct 9 12:15:32 UTC 2012
> [    0.000000] Command line: root=/dev/xvda1 textmode=1 xencons=xvc0 debug loglevel=9 earlyprintk=xen
> [    0.000000] ACPI in unprivileged domain disabled
> [    0.000000] e820: BIOS-provided physical RAM map:
> [    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
> [    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
> [    0.000000] Xen: [mem 0x0000000000100000-0x00000001387fffff] usable
> [    0.000000] bootconsole [xenboot0] enabled
> [    0.000000] NX (Execute Disable) protection: active
> [    0.000000] DMI not present or invalid.
> [    0.000000] e820: update [mem 0x00000000-0x0000ffff] usable ==> reserved
> [    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
> [    0.000000] No AGP bridge found
> [    0.000000] e820: last_pfn = 0x138800 max_arch_pfn = 0x400000000
> [    0.000000] e820: last_pfn = 0x100000 max_arch_pfn = 0x400000000
> [    0.000000] initial memory mapped: [mem 0x00000000-0x02781fff]
> [    0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
> [    0.000000] calculate_table_space_size: [mem 0x00000000-0x000fffff]
> [    0.000000]  [mem 0x00000000-0x000fffff] page 4k
> [    0.000000] calculate_table_space_size: [mem 0x00100000-0x1387fffff]
> [    0.000000]  [mem 0x00100000-0x1387fffff] page 4k
> [    0.000000] init_memory_mapping: [mem 0x137e33000-0x1387fffff]
> [    0.000000]  [mem 0x137e33000-0x1387fffff] page 4k

great, thank for testing it.

will come out new version that  willget rid of find_table size and
cal_table ...stuff.

Thanks

Yinghai
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