From: Mark Lord <lkml@rtr.ca>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
abelay@novell.com, lenb@kernel.org, rjw@sisk.pl,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: + restore-missing-sysfs-max_cstate-attr.patch added to -mm tree
Date: Fri, 30 Nov 2007 23:31:13 -0500 [thread overview]
Message-ID: <4750E391.4060309@rtr.ca> (raw)
In-Reply-To: <4750DCDC.8030306@rtr.ca>
Mark Lord wrote:
> Arjan van de Ven wrote:
>> On Fri, 30 Nov 2007 22:44:25 -0500
>> Mark Lord <lkml@rtr.ca> wrote:
>>>> all you need to do in your kernel module is call
...
>> set_acceptable_latency("mark", 5);
>>
>> and to remove the constraint again you just do
>>
>> remove_acceptable_latency("mark");
..
>>> Then why not have a sysfs entry for scripts to write tsoro
>>> to trigger the exact same end result? :)
>>
>> that's what is in current -mm pretty much
>> well not sysfs, but it goes via a file descriptor
>> (so that if the process that sets the contraint dies, the latency
>> requirement can be given up automatically)
> ...
>
> But doesn't that approach also make it nearly impossible to script ????
...
Okay, I have a working trivial kernel module that I can load/unload
to tweak this. But a simple sysfs attribute would be *so much* better
as a permanent kernel feature.
Binary interfaces (fd) are fine for some uses, but not nice for scripts.
Cheers
next prev parent reply other threads:[~2007-12-01 4:31 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200711302153.lAULrZ7n026255@imap1.linux-foundation.org>
[not found] ` <924EFEDD5F540B4284297C4DC59F3DEE2FAE6A@orsmsx423.amr.corp.intel.com>
2007-11-30 22:20 ` + restore-missing-sysfs-max_cstate-attr.patch added to -mm tree Andrew Morton
2007-11-30 22:37 ` Pallipadi, Venkatesh
2007-12-01 2:52 ` Mark Lord
2007-12-01 3:02 ` Arjan van de Ven
2007-12-01 3:14 ` Mark Lord
2007-12-01 3:18 ` Arjan van de Ven
2007-12-01 3:31 ` Mark Lord
2007-12-01 3:44 ` Mark Lord
2007-12-01 3:48 ` Mark Lord
2007-12-01 4:02 ` Mark Lord
2007-12-01 4:31 ` Mark Lord [this message]
2007-12-01 23:43 ` 20000+ wake-ups/second in 2.6.24. Bug? Mark Lord
2007-12-01 23:46 ` Arjan van de Ven
2007-12-01 23:55 ` Mark Lord
2007-12-02 0:13 ` Arjan van de Ven
2007-12-02 1:10 ` Andres Freund
2007-12-02 0:20 ` Rafael J. Wysocki
2008-02-04 17:29 ` Mark Lord
2008-02-04 17:50 ` Arjan van de Ven
2008-02-04 19:17 ` Mark Lord
2007-12-02 14:41 ` Adrian Bunk
2007-12-02 14:59 ` Mark Lord
2007-12-02 15:12 ` Adrian Bunk
2007-12-02 15:45 ` Mark Lord
2007-12-02 15:45 ` Mark Lord
2007-12-02 15:49 ` Mark Lord
2008-01-02 23:41 ` + restore-missing-sysfs-max_cstate-attr.patch added to -mm tree Mark Lord
2008-01-03 0:06 ` Pallipadi, Venkatesh
2008-01-03 0:51 ` Andrew Morton
2008-01-03 1:12 ` Pallipadi, Venkatesh
2008-01-03 4:25 ` Mark Lord
2008-01-03 4:18 ` Mark Lord
2008-01-04 2:16 ` Venki Pallipadi
2008-01-04 3:16 ` Mark Lord
2008-01-04 21:52 ` Mark Lord
2008-01-04 21:59 ` Pallipadi, Venkatesh
2008-01-05 16:27 ` Mark Lord
2008-01-06 21:34 ` Mark Lord
2008-01-07 7:18 ` Andrew Morton
2008-01-07 14:07 ` Arjan van de Ven
2008-01-07 15:07 ` Mark Lord
2008-01-07 14:18 ` Pallipadi, Venkatesh
2008-01-07 15:06 ` Mark Lord
2008-01-07 19:12 ` Len Brown
2008-01-07 21:33 ` Mark Lord
2008-01-07 22:43 ` Len Brown
2007-12-01 10:17 ` Andrew Morton
2007-12-01 16:30 ` Arjan van de Ven
2007-12-05 11:17 ` Pavel Machek
2007-12-07 21:38 ` Pallipadi, Venkatesh
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