linux-kernel - Re: [PATCH 1/8] Restructuring hpet timer generic clock interfaces

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Message-Id: <200705080247.54463.caglar@pardus.org.tr>
Date:	Tue, 8 May 2007 02:47:48 +0300
From:	"S.Çağlar Onur" <caglar@...dus.org.tr>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@...e.de>,
	Ingo Molnar <mingo@...e.hu>, Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH 1/8] Restructuring hpet timer generic clock interfaces

Hi;

07 May 2007 Pts tarihinde, Venki Pallipadi şunları yazmıştı: 
> i386 HPET changes.
>
> Patchset does the following changes to HPET support:
> * Add HPET force detect to ICH chipsets, and detect the
>   presence of HPET through PCI quirk.
> * Enable HPET timer to function in standard interrupt delivery mode,
> against the current legacy replacement mode
> * Enable HPET as a PER CPU time event, which will help in laptops that
>   supports C3 and hence has unreliable LAPIC timer.
>
> The changes enable processors to stay in idle longer, by increasing the
> average time spend in an idle state per call, by more than twice, on
> my dual core laptop. It reduces the number of interrupts on a totally
> idle system, compared to when I use PIT.

My machine (SONY VAIO FS-215B) just hangs/freezes (no oops, no MAGIC_SYSRQ) 
after writing "ACPI: Power Button (CM) [PWRB]" on screen

...
Machine check exception polling timer started.
apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
audit: initializing netlink socket (disabled)
audit(1178591695.734:1): initialized
highmem bounce pool size: 64 pages
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
ACPI: AC Adapter [ADP1] (on-line)
ACPI: Battery Slot [BAT0] (battery present)
input: Power Button (FF) as /class/input/input0
ACPI: Power Button (FF) [PWRF]
input: Lid Switch as /class/input/input1
ACPI: Lid Switch [LID0]
input: Power Button (CM) as /class/input/input2
ACPI: Power Button (CM) [PWRB]

Normal boot sequence continues with following;

ACPI: CPU0 (power states: C1[C1] C2[C2])
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI Exception (processor_core-0783): AE_NOT_FOUND, Processor Device is not 
present [20070126]
ACPI: Thermal Zone [THRM] (98 C)
isapnp: Scanning for PnP cards...
Time: acpi_pm clocksource has been installed.
isapnp: No Plug & Play device found
Real Time Clock Driver v1.12ac
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
Clocksource tsc unstable (delta = -490158796 ns)
floppy0: no floppy controllers found
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
loop: loaded (max 8 devices)
...

System boots fine with hpet=disable and by the way, i tried the first version 
of this patchset without a problem (if i remembered correctly, it was just 
force detects the hpet but only enables for x86_64)

zangetsu ~ # lspci
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express 
Processor to DRAM Controller (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML 
Express Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express 
Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
High Definition Audio Controller (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d3)
00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge 
(rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus 
Controller (rev 03)
06:03.0 CardBus bridge: Texas Instruments PCI7420 CardBus Controller
06:03.2 FireWire (IEEE 1394): Texas Instruments PCI7x20 1394a-2000 OHCI 
Two-Port PHY/Link-Layer Controller
06:03.3 Mass storage controller: Texas Instruments PCI7420/7620 Combo CardBus, 
1394a-2000 OHCI and SD/MS-Pro Controller
06:04.0 Network controller: Intel Corporation PRO/Wireless 2200BG Network 
Connection (rev 05)
06:08.0 Ethernet controller: Intel Corporation 82562ET/EZ/GT/GZ - PRO/100 VE 
(LOM) Ethernet Controller Mobile (rev 03)

Cheers
-- 
S.Çağlar Onur <caglar@...dus.org.tr>
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!

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