From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Kay Sievers <kay.sievers@vrfy.org>,
David Zeuthen <david@fubar.dk>,
linux-kernel@vger.kernel.org, axboe@kernel.dk,
linux-hotplug@vger.kernel.org
Subject: Re: [PATCH] [RFC] Add support for uevents on block device idle
Date: Mon, 23 Nov 2009 14:12:55 +0000 [thread overview]
Message-ID: <20091123141255.GA9889@srcf.ucam.org> (raw)
In-Reply-To: <20091122233749.GA9699@ucw.cz>
On Mon, Nov 23, 2009 at 12:37:49AM +0100, Pavel Machek wrote:
> On Wed 2009-11-18 20:07:12, Matthew Garrett wrote:
> > On Wed, Nov 18, 2009 at 09:03:21PM +0100, Kay Sievers wrote:
> >
> > > Sure, but what's wrong with reading that file every 50 seconds? Almost
> > > all boxes poll for media changes of optical drives and usb card
> > > readers anyway, so it's not that we are not doing stuff like this
> > > already.
> >
> > We poll for media because there's no event-based way of avoiding it - in
> > this case there is.
>
> ...when you add overhead to every disk operation. I'd say that polling
> once in 50 seconds is preferable to that.
Yeah, but 50 seconds isn't the timescale we're talking about here.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-11-23 14:12 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-17 14:37 [PATCH] [RFC] Add support for uevents on block device idle changes Matthew Garrett
2009-11-17 15:55 ` [PATCH] [RFC] Add support for uevents on block device idle Kay Sievers
2009-11-17 16:09 ` David Zeuthen
2009-11-17 18:57 ` Matthew Garrett
2009-11-18 19:30 ` Kay Sievers
2009-11-18 19:40 ` Matthew Garrett
2009-11-18 19:47 ` Kay Sievers
2009-11-18 19:53 ` Matthew Garrett
2009-11-18 20:03 ` Kay Sievers
2009-11-18 20:07 ` Matthew Garrett
2009-11-18 21:06 ` Kay Sievers
2009-11-18 21:29 ` Kay Sievers
2009-11-18 21:35 ` Matthew Garrett
2009-11-18 21:39 ` Kay Sievers
2009-11-18 21:45 ` Matthew Garrett
2009-11-18 21:33 ` Matthew Garrett
2009-11-18 21:40 ` Kay Sievers
2009-11-19 11:09 ` Kay Sievers
2009-11-19 13:01 ` Matthew Garrett
2009-11-19 13:29 ` Kay Sievers
2009-11-19 14:16 ` Matthew Garrett
2009-11-19 14:25 ` Kay Sievers
2009-11-19 14:30 ` Matthew Garrett
2009-11-19 14:34 ` Kay Sievers
2009-11-19 14:48 ` Matthew Garrett
2009-11-19 15:00 ` Kay Sievers
2009-11-20 20:29 ` Matthew Garrett
2009-11-22 23:37 ` Pavel Machek
2009-11-23 14:12 ` Matthew Garrett [this message]
2009-11-23 14:17 ` Jens Axboe
2009-11-23 14:25 ` Matthew Garrett
2009-11-23 14:31 ` Jens Axboe
2009-11-23 14:42 ` Matthew Garrett
2009-11-23 19:50 ` Jens Axboe
2009-11-23 19:54 ` Matthew Garrett
2009-11-18 22:10 ` [PATCH] [RFC] Add support for uevents on block device idle changes Bartlomiej Zolnierkiewicz
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