* [resend] 2.6.31 regression: hangs on Compaq Evo N800c with ACPI enabled - bisected
@ 2009-09-22 15:09 Ondrej Zary
2009-09-22 20:43 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Ondrej Zary @ 2009-09-22 15:09 UTC (permalink / raw)
To: venkatesh.pallipadi; +Cc: len.brown, linux-acpi, linux-kernel
Hello,
kernel 2.6.31 hangs during boot on Compaq Evo N800c laptop. 2.6.30 works fine.
See https://bugzilla.redhat.com/show_bug.cgi?id=522057
Bisection resulted in commit ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c:
$ git bisect bad
ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c is first bad commit
commit ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c
Author: Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
Date: Thu May 21 17:09:10 2009 -0700
ACPI: Disable ARB_DISABLE on platforms where it is not needed
ARB_DISABLE is a NOP on all of the recent Intel platforms.
For such platforms, reduce contention on c3_lock
by skipping the fake ARB_DISABLE.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
:040000 040000 f05492fbba2c068f22d7aefca36896f07ff8611b 47e784478de3c386591a92181e7784f5d224a989 M arch
:040000 040000 a379b031d617def0094cca3f56c2eda510a0604b cc00f83544238d1757fdf2a5e62206d1a49de2de M drivers
Reverting this commit fixes the regression.
CPU is Mobile Pentium 4-M:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Mobile Intel(R) Pentium(R) 4 - M CPU 2.20GHz
stepping : 7
cpu MHz : 2200.000
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up pebs bts cid
bogomips : 4395.79
clflush size : 64
power management:
--
Ondrej Zary
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [resend] 2.6.31 regression: hangs on Compaq Evo N800c with ACPI enabled - bisected
2009-09-22 15:09 [resend] 2.6.31 regression: hangs on Compaq Evo N800c with ACPI enabled - bisected Ondrej Zary
@ 2009-09-22 20:43 ` Rafael J. Wysocki
2009-09-22 21:17 ` Ondrej Zary
0 siblings, 1 reply; 3+ messages in thread
From: Rafael J. Wysocki @ 2009-09-22 20:43 UTC (permalink / raw)
To: Ondrej Zary; +Cc: venkatesh.pallipadi, len.brown, linux-acpi, linux-kernel
On Tuesday 22 September 2009, Ondrej Zary wrote:
> Hello,
> kernel 2.6.31 hangs during boot on Compaq Evo N800c laptop. 2.6.30 works fine.
> See https://bugzilla.redhat.com/show_bug.cgi?id=522057
Can you please file a kernel Bugzilla report for this issue, in the ACPI
category? The ACPI people use the kernel Bugzilla as the primary bug-tracking
facility.
> Bisection resulted in commit ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c:
>
> $ git bisect bad
> ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c is first bad commit
> commit ee1ca48fae7e575d5e399d4fdcfe0afc1212a64c
> Author: Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com>
> Date: Thu May 21 17:09:10 2009 -0700
>
> ACPI: Disable ARB_DISABLE on platforms where it is not needed
>
> ARB_DISABLE is a NOP on all of the recent Intel platforms.
>
> For such platforms, reduce contention on c3_lock
> by skipping the fake ARB_DISABLE.
>
> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
> Signed-off-by: Len Brown <len.brown@intel.com>
>
> :040000 040000 f05492fbba2c068f22d7aefca36896f07ff8611b 47e784478de3c386591a92181e7784f5d224a989 M arch
> :040000 040000 a379b031d617def0094cca3f56c2eda510a0604b cc00f83544238d1757fdf2a5e62206d1a49de2de M drivers
>
> Reverting this commit fixes the regression.
>
> CPU is Mobile Pentium 4-M:
>
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 15
> model : 2
> model name : Mobile Intel(R) Pentium(R) 4 - M CPU 2.20GHz
> stepping : 7
> cpu MHz : 2200.000
> cache size : 512 KB
> fdiv_bug : no
> hlt_bug : no
> f00f_bug : no
> coma_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid level : 2
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up pebs bts cid
> bogomips : 4395.79
> clflush size : 64
> power management:
Best,
Rafael
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2009-09-22 15:09 [resend] 2.6.31 regression: hangs on Compaq Evo N800c with ACPI enabled - bisected Ondrej Zary
2009-09-22 20:43 ` Rafael J. Wysocki
2009-09-22 21:17 ` Ondrej Zary
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