linux-kernel - Re: [PATCH 1/2] x86: fix keeping track of AMD C1E

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Message-ID: <20100718162449.GB21151@fancy-poultry.org>
Date:	Sun, 18 Jul 2010 18:24:49 +0200
From:	Heinz Diehl <htd@...cy-poultry.org>
To:	Michal Schmidt <mschmidt@...hat.com>
Cc:	Borislav Petkov <borislav.petkov@....com>,
	Hans Rosenfeld <hans.rosenfeld@....com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Shaohua Li <shaohua.li@...el.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 1/2] x86: fix keeping track of AMD C1E

On 14.07.2010, Michal Schmidt wrote: 

> I found another person reporting the same symptoms on
> GIGABYTE GA-MA770T-UD3P AthlonXII 620 (4 cores) kernel 2.6.33.5 (Mandriva)
> (http://www.abclinuxu.cz/poradna/hardware/show/308799, in Czech)

Here's the relevant part of my dmesg, kernel 2.6.35-rc5 with your
debbuging patch applied (just the debbuging patch, no other fix/patch in
this thread). The full dmesg output is attached.

[....]
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
Mount-cache hash table entries: 256
tseg: 00cfe00000
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
identify_cpu: before ANDing, c1e_detected: 0, boot_cpu_has(C1E): 0
identify_cpu:  after ANDing, c1e_detected: 0, boot_cpu_has(C1E): 0
mce: CPU supports 6 MCE banks
using C1E aware idle routine
Performance Events: AMD PMU driver.
... version:                0
... bit width:              48
... generic registers:      4
... value mask:             0000ffffffffffff
... max period:             00007fffffffffff
... fixed-purpose events:   0
... event mask:             000000000000000f
ACPI: Core revision 20100428
Setting APIC routing to flat
..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
CPU0: AMD Phenom(tm) II X4 905e Processor stepping 02
c1e_idle: cpu: 0, bits 0x08000000, c1e_detected: 0, boot_cpu_has(C1E): 0
System has AMD C1E enabled
Switch to broadcast mode on CPU0
Booting Node   0, Processors  #1
identify_cpu: before ANDing, c1e_detected: 1, boot_cpu_has(C1E): 1
identify_cpu:  after ANDing, c1e_detected: 1, boot_cpu_has(C1E): 0
Switch to broadcast mode on CPU1
 #2
 identify_cpu: before ANDing, c1e_detected: 1, boot_cpu_has(C1E): 0
 identify_cpu:  after ANDing, c1e_detected: 1, boot_cpu_has(C1E): 0
 Switch to broadcast mode on CPU2
  #3
 identify_cpu: before ANDing, c1e_detected: 1, boot_cpu_has(C1E): 0
 identify_cpu:  after ANDing, c1e_detected: 1, boot_cpu_has(C1E): 0
 Brought up 4 CPUs
 Total of 4 processors activated (20092.25 BogoMIPS).
 Switch to broadcast mode on CPU3
 NET: Registered protocol family 16
 node 0 link 0: io port [c000, ffff]
 TOM: 00000000d0000000 aka 3328M

View attachment "dmesg01.txt" of type "text/plain" (42649 bytes)