From: Mikael Pettersson <mikpe@it.uu.se>
To: Andrew Morton <akpm@osdl.org>
Cc: ebiederm@xmission.com (Eric W. Biederman),
Andi Kleen <ak@suse.de>, Linus Torvalds <torvalds@osdl.org>,
discuss@x86-64.org, William Cohen <wcohen@redhat.com>,
Komuro <komurojun-mbn@nifty.com>, Ernst Herzberg <earny@net4u.de>,
Andre Noll <maan@systemlinux.org>,
oprofile-list@lists.sourceforge.net,
Jens Axboe <jens.axboe@oracle.com>,
linux-usb-devel@lists.sourceforge.net, phil.el@wanadoo.fr,
Adrian Bunk <bunk@stusta.de>, Ingo Molnar <mingo@redhat.com>,
Alan Stern <stern@rowland.harvard.edu>,
linux-pci@atrey.karlin.mff.cuni.cz,
Stephen Hemminger <shemminger@osdl.org>,
Prakash Punnoor <prakash@punnoor.de>,
Len Brown <len.brown@intel.com>,
Alex Romosan <romosan@sycorax.lbl.gov>,
gregkh@suse.de,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrey Borzenkov <arvidjaar@mail.ru>
Subject: Re: [discuss] Re: 2.6.19-rc5: known regressions (v3)
Date: Thu, 16 Nov 2006 11:55:46 +0100 [thread overview]
Message-ID: <17756.17330.974883.486535@alkaid.it.uu.se> (raw)
In-Reply-To: <20061115133121.8d9d621f.akpm@osdl.org>
Andrew Morton writes:
> Surely the appropriate behaviour is to allow oprofile to steal the NMI and
> to then put the NMI back to doing the watchdog thing after oprofile has
> finished with it.
Which is _exactly_ what pre-2.6.19-rc1 kernels did. I implemented
the in-kernel API allowing real performance counter drivers like
oprofile (and perfctr) to claim the HW from the NMI watchdog,
do their work, and then release it which resumed the watchdog.
Note that oprofile (and perfctr) didn't do anything behind the
NMI watchdog's back. They went via the API. Nothing dodgy going on.
next prev parent reply other threads:[~2006-11-16 11:05 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-08 2:33 Linux 2.6.19-rc5 Linus Torvalds
[not found] ` <20061108085235.GT4729@stusta.de>
2006-11-08 9:29 ` [discuss] 2.6.19-rc5: known regressions Jan Beulich
2006-11-08 10:21 ` Adrian Bunk
2006-11-08 9:34 ` Jens Axboe
2006-11-08 19:09 ` Alex Romosan
2006-11-08 19:29 ` Jens Axboe
2006-11-08 19:38 ` Alex Romosan
2006-11-08 19:45 ` Jens Axboe
2006-11-08 21:40 ` Alex Romosan
2006-11-08 20:03 ` Arjan van de Ven
2006-11-08 20:19 ` Jens Axboe
2006-11-08 11:04 ` Eric W. Biederman
2006-11-08 11:32 ` Thomas Gleixner
[not found] ` <7813413.118221162987983254.komurojun-mbn@nifty.com>
2006-11-08 16:00 ` Linus Torvalds
2006-11-10 12:42 ` Re: Re: 2.6.19-rc5: known regressions :SMP kernel can not generate ISA irq Komuro
2006-11-13 16:02 ` Linus Torvalds
2006-11-13 17:11 ` Eric W. Biederman
2006-11-13 20:44 ` Ingo Molnar
2006-11-13 21:11 ` Eric W. Biederman
2006-11-14 8:14 ` [patch] irq: do not mask interrupts by default Ingo Molnar
2006-11-14 8:20 ` Arjan van de Ven
2006-11-14 16:10 ` Linus Torvalds
2006-11-14 17:52 ` [PATCH] Use delayed disable mode of ioapic edge triggered interrupts Eric W. Biederman
2006-11-14 23:35 ` Linus Torvalds
2006-11-15 1:17 ` Linus Torvalds
2006-11-15 5:14 ` Eric W. Biederman
2006-11-15 16:06 ` Linus Torvalds
2006-11-15 16:58 ` Eric W. Biederman
2006-11-15 12:40 ` Komuro
[not found] ` <20061115090427.GA16173@elte.hu>
2006-11-15 16:13 ` [patch] genirq: do not mask interrupts by default Linus Torvalds
2006-11-15 17:46 ` Ingo Molnar
2006-11-14 12:43 ` [patch] irq: " Komuro
[not found] ` <m1y7qm425l.fsf@ebiederm.dsl.xmission.com>
[not found] ` <Pine.LNX.4.64.0611080745150.3667@g5.osdl.org>
2006-11-08 16:22 ` 2.6.19-rc5: known regressions Adrian Bunk
2006-11-08 23:11 ` Tim Chen
2006-11-09 2:49 ` Tim Chen
2006-11-09 5:10 ` Eric W. Biederman
2006-11-13 22:46 ` Tim Chen
2006-11-14 0:03 ` Eric W. Biederman
2006-11-08 9:43 ` Linux 2.6.19-rc5 Nigel Cunningham
2006-11-08 9:59 ` Alessandro Suardi
2006-11-08 10:04 ` Nigel Cunningham
2006-11-08 14:19 ` Gene Heskett
2006-11-08 15:43 ` Linus Torvalds
[not found] ` <20061111015035.GU4729@stusta.de>
2006-11-11 9:08 ` [discuss] 2.6.19-rc5: known regressions (v2) Rafael J. Wysocki
2006-11-11 9:25 ` Paolo Ornati
2006-11-11 10:49 ` Rafael J. Wysocki
2006-11-11 12:29 ` Paolo Ornati
2006-11-14 16:44 ` Paolo Ornati
2006-11-29 10:10 ` [SOLVED] " Paolo Ornati
2006-11-13 22:14 ` 2.6.19-rc5: known regressions with patches Adrian Bunk
2006-11-13 22:56 ` Brian King
2006-11-13 23:15 ` Linus Torvalds
2006-11-14 2:35 ` Jeff Garzik
2006-11-15 10:21 ` 2.6.19-rc5: known regressions (v3) Adrian Bunk
2006-11-15 10:35 ` Jens Axboe
2006-11-15 10:53 ` Adrian Bunk
2006-11-15 10:35 ` Eric Dumazet
2006-11-15 10:50 ` Andi Kleen
2006-11-15 16:40 ` William Cohen
2006-11-15 16:48 ` [discuss] " Andi Kleen
2006-11-15 18:39 ` Andrew Morton
2006-11-15 18:45 ` Andi Kleen
2006-11-15 19:07 ` Linus Torvalds
2006-11-15 19:23 ` Andi Kleen
2006-11-15 20:21 ` Andrew Morton
2006-11-15 21:18 ` Eric W. Biederman
2006-11-15 21:31 ` Andrew Morton
2006-11-16 10:55 ` Mikael Pettersson [this message]
2006-11-16 20:23 ` Andrew Morton
2006-11-17 9:59 ` Mikael Pettersson
2006-11-17 10:13 ` Andrew Morton
2006-11-19 3:05 ` Bill Davidsen
2006-11-17 10:29 ` Andi Kleen
2006-11-16 3:21 ` Andi Kleen
2006-11-16 5:05 ` Andrew Morton
2006-11-16 7:04 ` Andi Kleen
2006-11-16 15:34 ` William Cohen
2006-11-16 15:47 ` Andi Kleen
2006-11-16 21:32 ` Stephane Eranian
2006-11-22 10:28 ` Eric Dumazet
2006-11-22 10:36 ` Andi Kleen
2006-11-22 18:42 ` Andrew Morton
2006-12-16 11:20 ` Ray Lee
2006-11-22 17:59 ` William Cohen
2006-11-22 18:05 ` William Cohen
2006-11-22 18:26 ` Eric Dumazet
2006-11-15 11:06 ` Brice Goglin
2006-11-15 22:32 ` Adrian Bunk
2006-11-15 12:07 ` Alan
2006-11-15 15:52 ` Stephen Hemminger
2006-11-15 16:35 ` Eric W. Biederman
2006-11-17 18:05 [discuss] " Mikael Pettersson
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