From: Andi Kleen <andi@firstfloor.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Vegard Nossum <vegard.nossum@gmail.com>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Andreas Herrmann <andreas.herrmann3@amd.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Arjan van de Ven <arjan@infradead.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [Bug #10710] [BISECTED] Lots of "rescheduling IPIs" in powertop
Date: Sun, 18 May 2008 22:30:30 +0200 [thread overview]
Message-ID: <483091E6.9080703@firstfloor.org> (raw)
In-Reply-To: <alpine.LFD.1.10.0805182017070.18798@apollo.tec.linutronix.de>
Thomas Gleixner wrote:
> stop these pointless ad hominem attacks!
Just my experience from past incidents sorry. I'm sure it never happened
to you.
>> [In case someone is interested it's CPUID 5 ECX bit 0 which enumerates
>> if the MWAIT enumeration is there. So the correct mwait_usable() that
>> would have avoided your problem would be something like (untested):
>>
>> return c->cpuid_level >= 5 &&
>> ((cpuid_ecx(5) & 1) == 0 || (cpuid_edx(5) >> 4) & 0xf) > 0);
>> ]
>
> I'm interested, but I'd be even more interested in some useful pointer
> to the magic bitnumbers in that check, but don't exert yourself in
> providing the information,
It's documented in the IA32 SDM vol2 as part of the CPUID description.
It's a reasonable expection that everyone hacking on cpuid code has that
at hand.
-Andi
next prev parent reply other threads:[~2008-05-18 20:30 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-18 11:10 2.6.26-rc2-git5: Reported regressions from 2.6.25 Rafael J. Wysocki
2008-05-18 11:10 ` [Bug #10493] mips BCM47XX compile error Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10711] BUG: unable to handle kernel paging request - scsi_bus_uevent Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10709] 2.6.26-rc2 hosed X? Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10582] INFO: task pdflush:27505 blocked for more than 120 seconds Rafael J. Wysocki
2008-05-19 5:58 ` Пламен Петров
2008-05-18 11:13 ` [Bug #10648] CONFIG_PRINTK_TIME broken on git HEAD ? Rafael J. Wysocki
2008-05-18 17:21 ` Peter Zijlstra
2008-05-18 18:37 ` Peter Zijlstra
2008-05-21 0:38 ` Gabriel C
2008-05-21 1:10 ` Gabriel C
2008-05-18 11:13 ` [Bug #10686] critical thermal shutdown regression 2.6.26-rc1 - HP Pavilion dv6700 Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10638] sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1 Rafael J. Wysocki
2008-05-18 17:21 ` Peter Zijlstra
2008-05-18 18:37 ` Peter Zijlstra
2008-05-19 1:24 ` Zhang, Yanmin
2008-05-19 5:55 ` Peter Zijlstra
2008-05-19 6:49 ` Zhang, Yanmin
2008-05-19 7:10 ` Peter Zijlstra
[not found] ` <20080530094541.GA32508@elte.hu>
2008-06-02 4:57 ` Zhang, Yanmin
2008-06-04 11:19 ` Ingo Molnar
2008-06-05 2:34 ` Zhang, Yanmin
2008-05-18 11:13 ` [Bug #10678] 2.6.26-rc1: warnings from sysfs, bluetooth related Rafael J. Wysocki
2008-05-19 22:58 ` Pavel Machek
2008-05-20 22:18 ` Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10628] 2.6.26-rc1-git1 -- trying to get vblank count for disabled pipe 0 Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10674] /proc/kallsyms broken in 2.6.26-rc1-git6 Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10670] BUG: linux-2.6.26-rc1 oops at thinkpad_acpi:led_set_status Rafael J. Wysocki
2008-05-18 13:15 ` Henrique de Moraes Holschuh
2008-05-18 11:13 ` [Bug #10613] BIOS bug, APIC version is 0 for CPU#0! Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10557] [regression] latest git couse kernel oops Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10708] V4L2-based build error Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10705] 2.6.26-rc2 - ntp.c build failure Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10620] X does not resume (intel chipset) Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10641] [BUG] 2.6.26-rc1-git4 - task blocked on powerpc for more than 120 seconds Rafael J. Wysocki
2008-05-19 7:09 ` Kamalesh Babulal
2008-05-19 14:42 ` Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10622] [BUG 2.6.26-rc1] scsi (or sysfs or vm?) oops in sr_probe() Rafael J. Wysocki
2008-05-22 11:50 ` James Bottomley
2008-05-18 11:13 ` [Bug #10701] snd_pcsp lockdep warning Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10643] s390 kvm_virtio.c build error Rafael J. Wysocki
2008-05-18 12:27 ` Heiko Carstens
2008-05-18 12:33 ` Avi Kivity
2008-05-18 11:13 ` [Bug #10629] 2.6.26-rc1-$sha1: RIP __d_lookup+0x8c/0x160 Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10649] lxfb driver regression Rafael J. Wysocki
2008-05-18 17:20 ` Andrew Morton
2008-05-18 22:16 ` Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10630] USB devices plugged into dock are not discoverred until reload of ehci-hcd Rafael J. Wysocki
2008-05-19 8:02 ` Oliver Neukum
2008-05-19 10:51 ` Lukas Hejtmanek
2008-05-19 10:39 ` Oliver Neukum
2008-05-19 10:46 ` Lukas Hejtmanek
2008-05-19 15:20 ` Greg KH
2008-05-20 10:57 ` Oliver Neukum
2008-05-20 11:17 ` Lukas Hejtmanek
2008-05-20 11:27 ` Oliver Neukum
2008-05-18 11:13 ` [Bug #10645] 2.6.26-rc1 lost half the RAM on UltraSPARC 5 Rafael J. Wysocki
2008-05-19 4:13 ` David Miller
2008-05-19 14:40 ` Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10632] [2.6.26-rc1] Output to console stops when booted without 'vga=791' Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10606] 2.6.26-rc1 regression: ACPI fails to load SDT. - Dell M1530 Rafael J. Wysocki
2008-05-18 23:08 ` Nigel Cunningham
2008-05-18 11:13 ` [Bug #10634] volanoMark regression with kernel 2.6.26-rc1 Rafael J. Wysocki
2008-05-18 17:21 ` Peter Zijlstra
2008-05-18 18:37 ` Peter Zijlstra
2008-05-18 11:13 ` [Bug #10679] " pcspkr: fix dependancies" breaks artsd Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10616] Horrendous Audio Stutter - current git Rafael J. Wysocki
2008-05-18 17:21 ` Peter Zijlstra
2008-05-18 18:15 ` Parag Warudkar
2008-05-18 18:30 ` Peter Zijlstra
2008-05-18 11:13 ` [Bug #10669] ACPI: kmemcheck: Caught 16-bit read from freed memory (f7c12ec6) Rafael J. Wysocki
2008-05-18 12:18 ` Vegard Nossum
2008-05-18 11:13 ` [Bug #10710] [BISECTED] Lots of "rescheduling IPIs" in powertop Rafael J. Wysocki
2008-05-18 12:23 ` Vegard Nossum
2008-05-18 12:33 ` Thomas Gleixner
2008-05-18 17:59 ` Andi Kleen
2008-05-18 19:27 ` Thomas Gleixner
2008-05-18 20:30 ` Andi Kleen [this message]
2008-05-19 0:57 ` Thomas Gleixner
2008-05-18 11:13 ` [Bug #10650] 2.6.26-rcX VC console scrolling regression Rafael J. Wysocki
2008-05-18 12:44 ` Jan Engelhardt
2008-05-18 11:13 ` [Bug #10642] general protection fault: 0000 [1] PREEMPT SMP DEBUG_PAGEALLOC Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10715] 2.6.25 -> 2.6.26-rc1: pcmcia flash card changed name from hda to hdc Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10744] REGRESSION: video driver stuck after screen blank Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10741] bug in `tty: BKL pushdown'? Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10730] build issue #503 for v2.6.26-rc2-433-gf26a398 : undefined reference to `request_firmware' Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10725] Write protect on on Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10733] avr32: export copy_page Rafael J. Wysocki
2008-05-18 12:35 ` Adrian Bunk
2008-05-18 11:13 ` [Bug #10732] REGRESSION: 2.6.26-rc2-git4: X server failed start on X61s laptop Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10716] VIDEO_DEV=y, DVB_CORE=m build error Rafael J. Wysocki
2008-05-18 12:34 ` Adrian Bunk
2008-05-18 11:13 ` [Bug #10724] ACPI : EC: GPE Rafael J. Wysocki
2008-05-18 16:58 ` Justin Mattock
2008-05-18 11:13 ` [Bug #9791] Clock is running too fast^Wslow using acpi_pm clocksource Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10717] crossbuild fails in modpost Rafael J. Wysocki
2008-05-19 13:44 ` Sam Ravnborg
2008-05-18 11:13 ` [Bug #10726] x86-64 NODES_SHIFT compile failure Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10718] [BUG] mm: bdi: export BDI attributes in sysfs Rafael J. Wysocki
2008-05-19 15:07 ` Arthur Jones
2008-05-18 11:13 ` [Bug #10713] ehci splatter in 2.6.26-rc2 Rafael J. Wysocki
2008-05-19 23:11 ` Lennert Buytenhek
2008-05-20 0:18 ` Lennert Buytenhek
2008-05-20 6:13 ` David Brownell
2008-05-20 8:25 ` Lennert Buytenhek
2008-05-20 10:50 ` [PATCH] " Lennert Buytenhek
2008-05-20 14:04 ` Alan Stern
2008-05-20 14:59 ` Lennert Buytenhek
2008-05-20 15:31 ` Alan Stern
2008-05-20 16:48 ` Alan Stern
2008-05-18 11:13 ` [Bug #10714] Badness seen on 2.6.26-rc2 with lockdep enabled Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10742] BISECTED REGRESSION: 2.6.26-rc2: FUSE changes break mount of ntfs-3g Rafael J. Wysocki
2008-05-18 11:13 ` [Bug #10731] gianfar build failure Rafael J. Wysocki
2008-05-19 20:34 ` 2.6.26-rc2-git5: Reported regressions from 2.6.25 Ioan Ionita
2008-05-20 21:56 ` Rafael J. Wysocki
-- strict thread matches above, loose matches on Subject: below --
2008-05-24 20:28 2.6.26-rc3-git7: " Rafael J. Wysocki
2008-05-24 20:31 ` [Bug #10710] [BISECTED] Lots of "rescheduling IPIs" in powertop Rafael J. Wysocki
2008-05-24 21:35 ` Vegard Nossum
2008-05-25 18:19 ` Adrian Bunk
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