linux-kernel - Re: [RFC PATCH -rt 2/2] RCU priority boosting additions to rcutorture

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]

Date:	Thu, 01 Feb 2007 13:42:42 +1100
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	paulmck@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	dipankar@...ibm.com, tytso@...ibm.com, dvhltc@...ibm.com,
	oleg@...sign.ru, twoerner.k@...il.com, josh@...edesktop.org,
	billh@...ppy.monkey.org, nielsen.esben@...glemail.com,
	corbet@....net
Subject: Re: [RFC PATCH -rt 2/2] RCU priority boosting additions to
	rcutorture

Hi Paul.

On Wed, 2007-01-31 at 18:31 -0800, Paul E. McKenney wrote:
> Good to hear from you, Nigel!

Thanks :)

> Should indeed be OK to freeze during suspend/hibernate.  Will my
> schedule_timeout_interruptible() be sufficient to allow the freeze
> to happen, or do I need to add an explicit try_to_freeze()?

You need a try_to_freeze() - the process has to enter the refrigerator()
function to be counted as frozen.

> Ah, and I probably need to use the same trick that mtd_blktrans_thread()
> does to avoid having all my sleeps killed of by an errant signal:
> 
> 	spin_lock_irq(&current->sighand->siglock);
> 	sigfillset(&current->blocked);
> 	recalc_sigpending();
> 	spin_unlock_irq(&current->sighand->siglock);
> 
> Or is such paranoia unnecessary?

Yeah. try_to_freeze() is a function now, so you can do something if
(try_to_freeze()) goto sleep_again if you so desire.

Regards,

Nigel

-
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/