From: mark gross <markgross@thegnar.org>
To: Jean Pihet <jean.pihet@newoldbits.com>
Cc: linux-pm@lists.linuxfoundation.org
Subject: Re: LPC 2011 Power Management Session notes
Date: Fri, 9 Sep 2011 15:50:52 -0700 [thread overview]
Message-ID: <20110909225052.GA21769@gvim.org> (raw)
In-Reply-To: <CAORVsuWKd9uvTTNCr_k9W6DeA+z3ZEaD99bqit++4xUy9zqKSQ@mail.gmail.com>
On Fri, Sep 09, 2011 at 10:09:48AM +0200, Jean Pihet wrote:
> Hi,
>
> On Fri, Sep 9, 2011 at 2:28 AM, Paul Walmsley <paul@pwsan.com> wrote:
> >
> > Available at
> >
> > http://pad.ubuntu.com/plumbers-2011-pwr-mgt
> >
> > in real time if anyone's interested
> Thanks for the doc!
>
>
> About the Device PM QoS user space interface:
> 1. Proposal: For every device, there will be a sysfs wakeup latency attribute
> 2. Proposal: Userspace processes should communicate their needs via sysfs
>
> I assume there can be only one user app that can open a given sysfs
> entry at a time, is that correct?
>
> Let me think about it and propose a patch next week.
My recollection of the evening was that the exposing of per device qos
latencies was not considered a good idea without better articulation on
how it would be used. (or misused)
FWIW a few folks (ok maybe just me) are not comfortable with exposing
raw values without a good enough abstraction for them to user mode such
that the values used through that user mode ABI would be somewhat
portable between ISA's or even versions of the same chips / platforms.
--mark
> Regards,
> Jean
>
> >
> >
> > - Paul
> > _______________________________________________
> > linux-pm mailing list
> > linux-pm@lists.linux-foundation.org
> > https://lists.linux-foundation.org/mailman/listinfo/linux-pm
> >
> _______________________________________________
> linux-pm mailing list
> linux-pm@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/linux-pm
prev parent reply other threads:[~2011-09-09 22:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-09 0:28 LPC 2011 Power Management Session notes Paul Walmsley
2011-09-09 8:09 ` Jean Pihet
2011-09-09 16:50 ` Mark Brown
2011-09-09 22:50 ` mark gross [this message]
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=20110909225052.GA21769@gvim.org \
--to=markgross@thegnar.org \
--cc=jean.pihet@newoldbits.com \
--cc=linux-pm@lists.linuxfoundation.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).