lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <201203280021.27582.rjw@sisk.pl>
Date:	Wed, 28 Mar 2012 00:21:27 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Tejun Heo <tj@...nel.org>
Cc:	Stephen Boyd <sboyd@...eaurora.org>, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Saravana Kannan <skannan@...eaurora.org>,
	Kay Sievers <kay.sievers@...y.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Christian Lamparter <chunkeey@...glemail.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	alan@...rguk.ukuu.org.uk,
	Linux PM mailing list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 2/2] firmware_class: Move request_firmware_nowait() to workqueues

On Wednesday, March 28, 2012, Tejun Heo wrote:
> On Tue, Mar 27, 2012 at 02:28:30PM -0700, Stephen Boyd wrote:
> > Oddly enough a work_struct was already part of the firmware_work
> > structure but nobody was using it. Instead of creating a new
> > kthread for each request_firmware_nowait() call just schedule the
> > work on the long system workqueue. This should avoid some overhead
> > in forking new threads when they're not strictly necessary.
> > 
> > Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
> > ---
> > 
> > Is it better to use alloc_workqueue() and not put these on the system
> > long workqueue?
> 
> No, just use schedule_work() unless there are specific requirements
> which can't be fulfilled that way (e.g. it's on memory allocation
> path, may consume large amount of cpu cycles, ...)

It may wait quite long.

Rafael
--
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

Powered by Openwall GNU/*/Linux Powered by OpenVZ