Re: Boot hangs after "Freeing initrd memory" with 2.6.31.11

From: "Ozan Çağlayan" <ozan@pardus.org.tr>
To: Yinghai Lu <yinghai@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	hpa@zytor.com, mingo@elte.hu, a.p.zijlstra@chello.nl,
	jaswinder@kernel.org, stable@kernel.org
Subject: Re: Boot hangs after "Freeing initrd memory" with 2.6.31.11
Date: Thu, 14 Jan 2010 15:36:39 +0200	[thread overview]
Message-ID: <4B4F1DE7.307@pardus.org.tr> (raw)
In-Reply-To: <4B4F1764.2040406@pardus.org.tr>

Ozan Çağlayan wrote On 14-01-2010 15:08:

(CC'ing stable)

>>
>> From 5095f59bda6793a7b8f0856096d6893fe98e0e51 Mon Sep 17 00:00:00 2001
>> From: Jaswinder Singh Rajput <jaswinder@kernel.org>
>> Date: Fri, 5 Jun 2009 23:27:17 +0530
>> Subject: [PATCH] x86: cpu_debug: Remove model information to reduce encoding-decoding
> 
> Reverting this commit on top of 2.6.31.11 fixes the boot hangs with AMD Athlon XP processors.
> I'll double check with other reporters in a day or two.

OK we've verified on 2 separate systems with Athlon XP that reverting the commit fixes the issue.
Here's proc/cpuinfo and relevant dmesg output for reference:

processor    : 0
vendor_id    : AuthenticAMD
cpu family    : 6
model        : 10
model name    : AMD Athlon(tm) XP 2600+
stepping    : 0
cpu MHz        : 1920.500
cache size    : 512 KB
fdiv_bug    : no
hlt_bug        : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 1
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up
bogomips    : 3842.29
clflush size    : 32
power management: ts

[    0.461404] Freeing initrd memory: 5191k freed
[    0.467844] initcall populate_rootfs+0x0/0x62 returned 0 after 217975 usecs
[    0.467947] calling  i8259A_init_sysfs+0x0/0x1d @ 1
[    0.468093] initcall i8259A_init_sysfs+0x0/0x1d returned 0 after 41 usecs
[    0.468190] calling  sbf_init+0x0/0xda @ 1
[    0.468282] initcall sbf_init+0x0/0xda returned 0 after 0 usecs
[    0.468378] calling  i8237A_init_sysfs+0x0/0x1d @ 1
[    0.468484] initcall i8237A_init_sysfs+0x0/0x1d returned 0 after 12 usecs
[    0.468582] calling  add_rtc_cmos+0x0/0x94 @ 1
[    0.468679] initcall add_rtc_cmos+0x0/0x94 returned 0 after 4 usecs
[    0.468780] calling  cache_sysfs_init+0x0/0x55 @ 1
[    0.468940] initcall cache_sysfs_init+0x0/0x55 returned 0 after 64 usecs
[    0.469041] calling  cpu_debug_init+0x0/0x1f @ 1
[    0.469190] cpu0(1) debug files 5
[    0.469282] initcall cpu_debug_init+0x0/0x1f returned 0 after 143 usecs <-- That call wasn't returning at all

I think that the commit should be reverted or a fix should be released for linux-2.6 tree,
as well as .31 and .32 stable trees.

Thanks,
Ozan Caglayan