[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <4AC5DC61.9060900@kernel.org>
Date: Fri, 02 Oct 2009 19:56:33 +0900
From: Tejun Heo <tj@...nel.org>
To: "Rafael J. Wysocki" <rjw@...k.pl>
CC: Pavel Machek <pavel@....cz>, jeff@...zik.org, mingo@...e.hu,
linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
jens.axboe@...cle.com, rusty@...tcorp.com.au,
cl@...ux-foundation.org, dhowells@...hat.com,
arjan@...ux.intel.com,
pm list <linux-pm@...ts.linux-foundation.org>,
Oren Laadan <orenl@...rato.com>
Subject: Re: [PATCH 01/19] freezer: don't get over-anxious while waiting
Hello, Pavel, Rafael.
Rafael J. Wysocki wrote:
> On Thursday 01 October 2009, Pavel Machek wrote:
>>> Freezing isn't exactly the most latency sensitive operation and
>>> there's no reason to burn cpu cycles and power waiting for it to
>>> complete. msleep(10) instead of yield(). This should improve
>>> reliability of emergency hibernation.
>> i don't see how it improves reliability, but its probably ok.
It's about battery. When emergency hibernation kicks in and something
is taking a while to freeze (usually nfs does this for me) burning
power waiting for it to finish is a pretty bad idea.
>> Well... for hibernation anyway. I can imagine cgroup users where
>> freeze is so fast that this matters. rjw cc-ed. pavel
>
> Thanks. I'd like to hear from the cgroup freezer people about that.
Oh... didn't know that. 10ms sleeps really matter there?
--
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists