From: Paul Mundt <lethal@linux-sh.org>
To: Kay Sievers <kay.sievers@suse.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
LKML <linux-kernel@vger.kernel.org>, Greg KH <gregkh@suse.de>,
Linux PM mailing list <linux-pm@lists.linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Magnus Damm <magnus.damm@gmail.com>,
linux-sh@vger.kernel.org
Subject: Re: [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev
Date: Tue, 22 Mar 2011 22:23:48 +0000 [thread overview]
Message-ID: <20110322222347.GA3978@linux-sh.org> (raw)
In-Reply-To: <1300831256.1815.22.camel@zag>
On Tue, Mar 22, 2011 at 11:00:56PM +0100, Kay Sievers wrote:
> On Wed, 2011-03-23 at 06:49 +0900, Paul Mundt wrote:
> > The comment at the top of sys.c says:
> >
> > * sys.c - pseudo-bus for system 'devices' (cpus, PICs, timers, etc)
>
> Which is what we need to get rid of. It does not make any sense on the
> global picture to have anything like that exported to userspace.
>
So far I haven't heard any rationale for why it doesn't. Exporting CPU
state to userspace certainly makes sense, and the sysdev model has worked
reasonably for CPUs, memory nodes, etc.
> People should really stop messing around in /sys for optimization
> purposes. We have a common device model, and need to use it. Sysdevs do
> not fit into that model.
>
> I can't tell how that fits into your use case, but please use something
> else than sysfs, if you need device information exported, but you can't
> use "struct device".
>
As long as CPU state is present in sysfs people will be tied to it for
per-CPU kobjects and the like, and until something concrete is proposed
for what to do about these cases there's not much chance of sysdevs going
away.
Once cpufreq, timekeeping, and NUMA node state have migrated to whatever
the driver model folks find acceptable, I'll happily follow suit.
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mundt <lethal@linux-sh.org>
To: Kay Sievers <kay.sievers@suse.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
LKML <linux-kernel@vger.kernel.org>, Greg KH <gregkh@suse.de>,
Linux PM mailing list <linux-pm@lists.linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Magnus Damm <magnus.damm@gmail.com>,
linux-sh@vger.kernel.org
Subject: Re: [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev
Date: Wed, 23 Mar 2011 07:23:48 +0900 [thread overview]
Message-ID: <20110322222347.GA3978@linux-sh.org> (raw)
In-Reply-To: <1300831256.1815.22.camel@zag>
On Tue, Mar 22, 2011 at 11:00:56PM +0100, Kay Sievers wrote:
> On Wed, 2011-03-23 at 06:49 +0900, Paul Mundt wrote:
> > The comment at the top of sys.c says:
> >
> > * sys.c - pseudo-bus for system 'devices' (cpus, PICs, timers, etc)
>
> Which is what we need to get rid of. It does not make any sense on the
> global picture to have anything like that exported to userspace.
>
So far I haven't heard any rationale for why it doesn't. Exporting CPU
state to userspace certainly makes sense, and the sysdev model has worked
reasonably for CPUs, memory nodes, etc.
> People should really stop messing around in /sys for optimization
> purposes. We have a common device model, and need to use it. Sysdevs do
> not fit into that model.
>
> I can't tell how that fits into your use case, but please use something
> else than sysfs, if you need device information exported, but you can't
> use "struct device".
>
As long as CPU state is present in sysfs people will be tied to it for
per-CPU kobjects and the like, and until something concrete is proposed
for what to do about these cases there's not much chance of sysdevs going
away.
Once cpufreq, timekeeping, and NUMA node state have migrated to whatever
the driver model folks find acceptable, I'll happily follow suit.
next prev parent reply other threads:[~2011-03-22 22:23 UTC|newest]
Thread overview: 198+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-10 0:31 [RFC][PATCH 0/2] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Rafael J. Wysocki
2011-03-10 0:33 ` [RFC][PATCH 1/2] Introduce struct syscore_ops and related functionality Rafael J. Wysocki
2011-03-10 0:33 ` Rafael J. Wysocki
2011-03-10 3:33 ` [linux-pm] " Alan Stern
2011-03-10 10:42 ` Rafael J. Wysocki
2011-03-10 10:42 ` Rafael J. Wysocki
2011-03-10 11:30 ` [RFC][Update][PATCH " Rafael J. Wysocki
2011-03-11 17:11 ` Greg KH
2011-03-11 17:11 ` Greg KH
2011-03-11 20:13 ` Rafael J. Wysocki
2011-03-11 20:13 ` Rafael J. Wysocki
2011-03-11 20:16 ` Greg KH
2011-03-11 20:33 ` Rafael J. Wysocki
2011-03-11 20:33 ` Rafael J. Wysocki
2011-03-11 20:16 ` Greg KH
2011-03-10 11:30 ` Rafael J. Wysocki
2011-03-10 3:33 ` [RFC][PATCH " Alan Stern
2011-03-10 0:34 ` [RFC][PATCH 2/2] Convert several sysdev users to using struct syscore_ops Rafael J. Wysocki
2011-03-10 0:34 ` Rafael J. Wysocki
2011-03-11 17:12 ` Greg KH
2011-03-11 17:12 ` Greg KH
2011-03-11 20:29 ` Rafael J. Wysocki
2011-03-11 20:29 ` Rafael J. Wysocki
2011-03-11 20:33 ` Greg KH
2011-03-11 20:33 ` Greg KH
2011-03-11 20:45 ` Rafael J. Wysocki
2011-03-11 20:45 ` Rafael J. Wysocki
2011-03-10 13:05 ` [RFC][PATCH 0/2] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Kay Sievers
2011-03-10 13:05 ` Kay Sievers
2011-03-10 19:04 ` Rafael J. Wysocki
2011-03-10 19:04 ` Rafael J. Wysocki
2011-03-12 21:12 ` [PATCH 0/8] " Rafael J. Wysocki
2011-03-12 21:12 ` Rafael J. Wysocki
2011-03-12 21:13 ` [PATCH 1/8] PM / Core: Introcude struct syscore_ops Rafael J. Wysocki
2011-03-12 21:13 ` Rafael J. Wysocki
2011-03-12 21:15 ` [PATCH 2/8] x86: Use syscore_ops instead of sysdev classes and sysdevs Rafael J. Wysocki
2011-03-12 21:15 ` Rafael J. Wysocki
2011-03-13 14:23 ` Thomas Gleixner
2011-03-13 15:07 ` Rafael J. Wysocki
2011-03-13 15:07 ` Rafael J. Wysocki
2011-03-13 14:23 ` Thomas Gleixner
2011-03-12 21:16 ` [PATCH 3/8] ACPI: Use syscore_ops instead of sysdev class and sysdev Rafael J. Wysocki
2011-03-18 21:38 ` Len Brown
2011-03-18 21:38 ` Len Brown
2011-03-12 21:16 ` Rafael J. Wysocki
2011-03-12 21:17 ` [PATCH 4/8] timekeeping: " Rafael J. Wysocki
2011-03-13 13:56 ` Thomas Gleixner
2011-03-13 13:56 ` Thomas Gleixner
2011-03-13 15:08 ` Rafael J. Wysocki
2011-03-13 15:08 ` Rafael J. Wysocki
2011-03-12 21:17 ` Rafael J. Wysocki
2011-03-12 21:18 ` [PATCH 5/8] PCI / Intel IOMMU: " Rafael J. Wysocki
2011-03-12 21:18 ` Rafael J. Wysocki
2011-06-02 17:30 ` Tony Luck
2011-06-06 17:57 ` Rafael J. Wysocki
2011-06-06 17:58 ` Luck, Tony
2011-06-06 17:58 ` Luck, Tony
2011-06-06 17:57 ` Rafael J. Wysocki
2011-06-02 17:30 ` Tony Luck
2011-03-12 21:18 ` [PATCH 6/8] KVM: " Rafael J. Wysocki
2011-03-12 21:18 ` Rafael J. Wysocki
2011-03-12 21:20 ` [PATCH 7/8] cpufreq: Use syscore_ops for boot CPU suspend/resume Rafael J. Wysocki
2011-03-12 21:20 ` Rafael J. Wysocki
2011-03-15 21:43 ` [Update, v2] " Rafael J. Wysocki
2011-03-15 21:43 ` Rafael J. Wysocki
2011-03-12 21:21 ` [PATCH 8/8] Introduce ARCH_NO_SYSDEV_OPS config option Rafael J. Wysocki
2011-03-13 13:55 ` Thomas Gleixner
2011-03-13 13:55 ` Thomas Gleixner
2011-03-13 15:30 ` [Update] " Rafael J. Wysocki
2011-03-13 15:30 ` Rafael J. Wysocki
2011-03-12 21:21 ` Rafael J. Wysocki
2011-03-13 13:02 ` [PATCH 9-10/10] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Rafael J. Wysocki
2011-03-13 13:02 ` Rafael J. Wysocki
2011-03-13 13:03 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev R. J. Wysocki
2011-03-13 13:03 ` R. J. Wysocki
2011-03-17 8:20 ` Paul Mundt
2011-03-17 8:20 ` Paul Mundt
2011-03-19 0:47 ` Rafael J. Wysocki
2011-03-19 0:47 ` Rafael J. Wysocki
2011-03-22 14:04 ` Paul Mundt
2011-03-22 14:04 ` Paul Mundt
2011-03-22 14:04 ` Paul Mundt
2011-03-22 14:19 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 14:19 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 20:30 ` Rafael J. Wysocki
2011-03-22 20:30 ` Rafael J. Wysocki
2011-03-22 20:30 ` Rafael J. Wysocki
2011-03-22 20:39 ` Kay Sievers
2011-03-22 20:39 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 20:39 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 21:00 ` Rafael J. Wysocki
2011-03-22 21:00 ` Rafael J. Wysocki
2011-03-22 21:00 ` Rafael J. Wysocki
2011-03-22 21:12 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 21:12 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 21:49 ` Paul Mundt
2011-03-22 21:49 ` Paul Mundt
2011-03-22 21:49 ` Paul Mundt
2011-03-22 22:00 ` Kay Sievers
2011-03-22 22:00 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 22:00 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 22:23 ` Rafael J. Wysocki
2011-03-22 22:23 ` Rafael J. Wysocki
2011-03-22 22:23 ` Rafael J. Wysocki
2011-03-22 22:44 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 22:44 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 23:32 ` Rafael J. Wysocki
2011-03-22 23:32 ` Rafael J. Wysocki
2011-03-22 23:32 ` Rafael J. Wysocki
2011-03-22 23:46 ` Kay Sievers
2011-03-22 23:46 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 23:46 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 23:50 ` Rafael J. Wysocki
2011-03-22 23:50 ` Rafael J. Wysocki
2011-03-22 23:50 ` Rafael J. Wysocki
2011-03-23 9:45 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Russell King - ARM Linux
2011-03-23 9:45 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Russell King - ARM Linux
2011-03-23 9:45 ` Russell King - ARM Linux
2011-03-22 22:44 ` Kay Sievers
2011-03-22 22:23 ` Paul Mundt [this message]
2011-03-22 22:23 ` Paul Mundt
2011-03-23 11:12 ` Mark Brown
2011-03-23 11:12 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Mark Brown
2011-03-23 11:12 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Mark Brown
2011-03-23 11:28 ` Paul Mundt
2011-03-23 11:28 ` Paul Mundt
2011-03-23 11:28 ` Paul Mundt
2011-03-22 22:23 ` Paul Mundt
2011-03-22 22:05 ` Rafael J. Wysocki
2011-03-22 22:05 ` Rafael J. Wysocki
2011-03-22 22:20 ` Kay Sievers
2011-03-22 22:20 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 22:20 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 22:42 ` Rafael J. Wysocki
2011-03-22 22:42 ` Rafael J. Wysocki
2011-03-22 22:42 ` Rafael J. Wysocki
2011-03-22 22:56 ` Kay Sievers
2011-03-22 22:56 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 22:56 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 23:05 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev Kay Sievers
2011-03-22 23:05 ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev Kay Sievers
2011-03-22 23:47 ` Rafael J. Wysocki
2011-03-22 23:47 ` Rafael J. Wysocki
2011-03-22 23:47 ` Rafael J. Wysocki
2011-03-22 23:05 ` Kay Sievers
2011-03-22 22:05 ` Rafael J. Wysocki
2011-03-22 21:12 ` Kay Sievers
2011-03-22 14:19 ` Kay Sievers
2011-03-22 20:19 ` Rafael J. Wysocki
2011-03-22 20:19 ` Rafael J. Wysocki
2011-03-22 20:19 ` Rafael J. Wysocki
2011-03-23 9:59 ` Paul Mundt
2011-03-23 9:59 ` Paul Mundt
2011-03-23 20:39 ` Rafael J. Wysocki
2011-03-23 20:39 ` Rafael J. Wysocki
2011-03-23 20:39 ` Rafael J. Wysocki
2011-03-23 9:59 ` Paul Mundt
2011-03-19 0:47 ` Rafael J. Wysocki
2011-03-17 8:20 ` Paul Mundt
2011-03-13 13:03 ` R. J. Wysocki
2011-03-13 13:04 ` [PATCH 10/10] ARM: Use struct syscore_ops instead of sysdevs for PM in timer and leds Rafael J. Wysocki
2011-03-13 13:04 ` Rafael J. Wysocki
2011-03-13 13:04 ` Rafael J. Wysocki
2011-03-14 9:06 ` Stephen Boyd
2011-03-14 9:06 ` [PATCH 10/10] ARM: Use struct syscore_ops instead of sysdevs Stephen Boyd
2011-03-14 9:06 ` [PATCH 10/10] ARM: Use struct syscore_ops instead of sysdevs for PM in timer and leds Stephen Boyd
2011-03-14 19:54 ` [Update] " Rafael J. Wysocki
2011-03-14 19:54 ` Rafael J. Wysocki
2011-03-14 19:54 ` Rafael J. Wysocki
2011-03-13 13:02 ` [PATCH 9-10/10] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Rafael J. Wysocki
2011-03-21 23:31 ` [PATCH 0/6] Do not use sysdevs for implementing "core" PM operations on x86 Rafael J. Wysocki
2011-03-21 23:31 ` Rafael J. Wysocki
2011-03-21 23:34 ` [PATCH 1/6] x86: Use syscore_ops instead of sysdev classes and sysdevs Rafael J. Wysocki
2011-03-21 23:34 ` Rafael J. Wysocki
2011-03-21 23:35 ` [PATCH 2/6] timekeeping: Use syscore_ops instead of sysdev class and sysdev Rafael J. Wysocki
2011-03-21 23:35 ` Rafael J. Wysocki
2011-03-21 23:36 ` [PATCH 3/6] PCI / Intel IOMMU: " Rafael J. Wysocki
2011-03-22 10:57 ` Joerg Roedel
2011-03-22 22:07 ` Rafael J. Wysocki
2011-03-22 22:07 ` Rafael J. Wysocki
2011-03-23 7:48 ` Roedel, Joerg
2011-03-23 7:48 ` Roedel, Joerg
2011-03-22 10:57 ` Joerg Roedel
2011-03-21 23:36 ` Rafael J. Wysocki
2011-03-21 23:37 ` [PATCH 4/6] KVM: " Rafael J. Wysocki
2011-03-21 23:37 ` Rafael J. Wysocki
2011-03-22 9:18 ` Avi Kivity
2011-03-22 9:18 ` Avi Kivity
2011-03-21 23:38 ` [PATCH 5/6] cpufreq: Use syscore_ops for boot CPU suspend/resume (v2) Rafael J. Wysocki
2011-03-21 23:38 ` Rafael J. Wysocki
2011-03-21 23:38 ` [PATCH 6/6] Introduce ARCH_NO_SYSDEV_OPS config option (v2) Rafael J. Wysocki
2011-03-21 23:38 ` Rafael J. Wysocki
2011-03-22 10:32 ` [PATCH 0/6] Do not use sysdevs for implementing "core" PM operations on x86 Ingo Molnar
2011-03-22 20:33 ` Rafael J. Wysocki
2011-03-22 20:33 ` Rafael J. Wysocki
2011-03-25 22:51 ` [GIT PULL] More power management updates for 2.6.39 Rafael J. Wysocki
2011-03-25 22:51 ` Rafael J. Wysocki
2011-03-22 10:32 ` [PATCH 0/6] Do not use sysdevs for implementing "core" PM operations on x86 Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110322222347.GA3978@linux-sh.org \
--to=lethal@linux-sh.org \
--cc=gregkh@suse.de \
--cc=kay.sievers@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@lists.linux-foundation.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=magnus.damm@gmail.com \
--cc=rjw@sisk.pl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.