From: Andy Whitcroft <apw@canonical.com>
To: Greg Kroah-Hartman <gregkh@suse.de>, linux-usb@vger.kernel.org
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] UBUNTU: SAUCE: khubd -- switch USB product/manufacturer/serial handling to RCU
Date: Mon, 14 Jun 2010 12:17:34 +0100 [thread overview]
Message-ID: <20100614111734.GT12061@shadowen.org> (raw)
In-Reply-To: <1276514068-23668-1-git-send-email-apw@canonical.com>
On Mon, Jun 14, 2010 at 12:14:28PM +0100, Andy Whitcroft wrote:
> With the introduction of wireless USB hubs the product, manufacturer,
> and serial number are now mutable. This necessitates new locking in the
> consumers of these values including the sysfs read routines in order to
> prevent use-after-free acces to these values. These extra locks create
> significant lock contention leading to increased boot times (0.3s for an
> example Atom based system). Move update of these values to RCU based
> locking.
Bah, some Ubuntu-ism leaked out in the summary test, I've resent it with
those removed.
-apw
prev parent reply other threads:[~2010-06-14 11:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-14 11:14 Andy Whitcroft
2010-06-14 11:17 ` Andy Whitcroft [this message]
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