From: Linus Torvalds <torvalds@linux-foundation.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
LKML <linux-kernel@vger.kernel.org>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
pm list <linux-pm@lists.linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC][PATCH 2/2] PM: Rework handling of interrupts during suspend-resume
Date: Wed, 25 Feb 2009 08:19:24 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.2.00.0902250818200.3111@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0902251027270.3373-100000@iolanthe.rowland.org>
On Wed, 25 Feb 2009, Alan Stern wrote:
> On Tue, 24 Feb 2009, Rafael J. Wysocki wrote:
>
> > I think the most important source of level triggered interrupts are PCI
> > devices, so perhaps we can make the PCI PM core use bit 10 of the PCI Device
> > Control register to prevent devices from generating INTx after the drivers'
> > suspend routines have been executed?
>
> I wish that were true. As I recall, the original PCI specification did
> not define this bit, and older PCI devices don't support it. So you
> can't count on being able to supress interrupt generation this way.
It's definitely a new feature. In fact, I think even the current one makes
it optional, so even for "new" devices it's very unclear how many of them
actually support that bit.
Linus
next parent reply other threads:[~2009-02-25 16:19 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.0902251027270.3373-100000@iolanthe.rowland.org>
2009-02-25 16:19 ` Linus Torvalds [this message]
[not found] <Pine.LNX.4.44L0.0902270948540.2926-100000@iolanthe.rowland.org>
2009-02-27 20:30 ` [RFC][PATCH 2/2] PM: Rework handling of interrupts during suspend-resume Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902271221360.3111@localhost.localdomain>
2009-02-28 3:54 ` Arve Hjønnevåg
[not found] ` <d6200be20902271954q16697282ia056d4f40ab49184@mail.gmail.com>
2009-02-28 10:06 ` Rafael J. Wysocki
[not found] ` <200902281106.41793.rjw@sisk.pl>
2009-02-28 17:03 ` Linus Torvalds
2009-02-28 22:15 ` Arve Hjønnevåg
[not found] <Pine.LNX.4.44L0.0902262211090.22001-100000@netrider.rowland.org>
2009-02-27 4:43 ` Linus Torvalds
2009-02-27 14:59 ` Alan Stern
[not found] <alpine.LFD.2.00.0902261620370.3111@localhost.localdomain>
2009-02-27 3:20 ` Alan Stern
2009-02-22 17:37 [RFC][PATCH 0/2] Rework disabling " Rafael J. Wysocki
2009-02-22 17:39 ` [RFC][PATCH 2/2] PM: Rework handling " Rafael J. Wysocki
[not found] ` <200902221839.50357.rjw@sisk.pl>
2009-02-22 18:01 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902220946070.3111@localhost.localdomain>
2009-02-22 22:42 ` Rafael J. Wysocki
[not found] ` <200902222342.08285.rjw@sisk.pl>
2009-02-22 23:48 ` Rafael J. Wysocki
[not found] ` <200902230048.33635.rjw@sisk.pl>
2009-02-23 0:05 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902221603440.3111@localhost.localdomain>
2009-02-23 1:23 ` Linus Torvalds
2009-02-23 3:04 ` Eric W. Biederman
2009-02-23 8:36 ` Ingo Molnar
[not found] ` <m1ab8ddfbr.fsf@fess.ebiederm.org>
2009-02-23 8:44 ` Ingo Molnar
[not found] ` <20090223084400.GB9582@elte.hu>
2009-02-23 9:22 ` Eric W. Biederman
[not found] ` <m17i3ha4nk.fsf@fess.ebiederm.org>
2009-02-23 9:44 ` Ingo Molnar
2009-02-23 10:13 ` Benjamin Herrenschmidt
[not found] ` <20090223094441.GM9582@elte.hu>
2009-02-23 10:42 ` Eric W. Biederman
[not found] ` <m1bpst77te.fsf@fess.ebiederm.org>
2009-02-23 11:03 ` Rafael J. Wysocki
2009-02-23 11:04 ` Ingo Molnar
[not found] ` <20090223110433.GA17312@elte.hu>
2009-02-23 14:45 ` Rafael J. Wysocki
[not found] ` <200902231545.26250.rjw@sisk.pl>
2009-02-23 15:06 ` Ingo Molnar
2009-02-23 21:59 ` Rafael J. Wysocki
[not found] ` <200902231203.09082.rjw@sisk.pl>
2009-02-23 15:28 ` Eric W. Biederman
[not found] ` <m18wnx41h5.fsf@fess.ebiederm.org>
2009-02-23 21:39 ` Rafael J. Wysocki
[not found] ` <200902232239.05926.rjw@sisk.pl>
2009-02-24 3:30 ` Eric W. Biederman
[not found] ` <m1iqn01ph3.fsf@fess.ebiederm.org>
2009-02-24 22:42 ` Rafael J. Wysocki
[not found] ` <200902242342.07721.rjw@sisk.pl>
2009-02-24 22:51 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902241449221.3111@localhost.localdomain>
2009-02-24 23:07 ` Rafael J. Wysocki
[not found] ` <200902250007.13069.rjw@sisk.pl>
2009-02-24 23:09 ` Ingo Molnar
[not found] ` <20090224230935.GA15165@elte.hu>
2009-02-24 23:29 ` Rafael J. Wysocki
[not found] ` <200902250029.16107.rjw@sisk.pl>
2009-02-25 13:23 ` Ingo Molnar
2009-02-26 1:17 ` Arve Hjønnevåg
[not found] ` <d6200be20902251717r531c022bl4c25fcb902201188@mail.gmail.com>
2009-02-26 1:27 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902251724220.3111@localhost.localdomain>
2009-02-26 2:13 ` Arve Hjønnevåg
[not found] ` <d6200be20902251813o3ff4a065nb0a54321e27c512d@mail.gmail.com>
2009-02-26 2:51 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902251848120.3111@localhost.localdomain>
2009-02-26 3:00 ` Ingo Molnar
[not found] ` <20090226030050.GA3361@elte.hu>
2009-02-26 3:31 ` Arve Hjønnevåg
[not found] ` <d6200be20902251931lf563c2aw43d5266e9677e168@mail.gmail.com>
2009-02-26 3:37 ` Linus Torvalds
2009-02-26 3:50 ` Arve Hjønnevåg
[not found] ` <d6200be20902251950l34d5968q4b553ce8305ebd4b@mail.gmail.com>
2009-02-26 3:57 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902251956450.3111@localhost.localdomain>
2009-02-26 4:13 ` Arve Hjønnevåg
[not found] ` <d6200be20902252013v366ce771w8a129e9f3b75927f@mail.gmail.com>
2009-02-26 4:20 ` Eric W. Biederman
[not found] ` <m1y6vtkewc.fsf@fess.ebiederm.org>
2009-02-26 4:24 ` Arve Hjønnevåg
2009-02-26 9:50 ` Rafael J. Wysocki
[not found] ` <200902261050.50531.rjw@sisk.pl>
2009-02-26 20:34 ` Arve Hjønnevåg
[not found] ` <d6200be20902261234i5a3896fo78a7f56d16a247c7@mail.gmail.com>
2009-02-26 20:57 ` Benjamin Herrenschmidt
2009-02-26 21:20 ` Arve Hjønnevåg
[not found] ` <d6200be20902261320q58a347e5s1af790e56b186c81@mail.gmail.com>
2009-02-26 21:49 ` Benjamin Herrenschmidt
2009-02-26 21:58 ` Rafael J. Wysocki
[not found] ` <200902262258.55835.rjw@sisk.pl>
2009-02-26 22:10 ` Linus Torvalds
[not found] ` <alpine.LFD.2.00.0902261404580.3111@localhost.localdomain>
2009-02-26 22:30 ` Arve Hjønnevåg
2009-02-26 22:30 ` Rafael J. Wysocki
[not found] ` <d6200be20902261430w19ea3e6fye014f8443d9ab5ca@mail.gmail.com>
2009-02-26 23:10 ` Rafael J. Wysocki
[not found] ` <200902270010.38291.rjw@sisk.pl>
2009-02-27 0:00 ` Arve Hjønnevåg
[not found] ` <d6200be20902261600t7531568ekd9a7aa9215f53263@mail.gmail.com>
2009-02-27 0:27 ` Linus Torvalds
2009-02-25 4:16 ` Eric W. Biederman
[not found] ` <m18wnvup53.fsf@fess.ebiederm.org>
2009-02-25 4:26 ` Linus Torvalds
2009-02-25 4:59 ` Eric W. Biederman
2009-02-25 15:32 ` Alan Stern
[not found] ` <20090223083645.GA9582@elte.hu>
2009-02-23 11:29 ` Rafael J. Wysocki
[not found] ` <200902231229.58743.rjw@sisk.pl>
2009-02-23 12:28 ` Ingo Molnar
2009-02-23 12:45 ` Ingo Molnar
[not found] ` <20090223124503.GC31427@elte.hu>
2009-02-23 15:07 ` Rafael J. Wysocki
2009-02-23 15:52 ` Johannes Berg
2009-02-23 17:16 ` Ingo Molnar
[not found] ` <20090223171630.GA28651@elte.hu>
2009-02-23 17:28 ` Linus Torvalds
2009-02-23 22:11 ` Rafael J. Wysocki
[not found] ` <20090223122832.GB31427@elte.hu>
2009-02-23 14:48 ` Rafael J. Wysocki
2009-02-23 20:49 ` Benjamin Herrenschmidt
2009-02-23 22:11 ` Arve Hjønnevåg
[not found] ` <d6200be20902231411s654f8b3csf1388a97f3f94ac4@mail.gmail.com>
2009-02-23 22:23 ` Rafael J. Wysocki
2009-02-23 22:44 ` Arve Hjønnevåg
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