linux-kernel - Re: Serious problem with ticket spinlocks on ia64

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <AANLkTinHOpcdAJd0_4G=OFAnMZaXKeOsqnbjJMAxCume@mail.gmail.com>
Date:	Tue, 31 Aug 2010 15:17:28 -0700
From:	Tony Luck <tony.luck@...il.com>
To:	Petr Tesarik <ptesarik@...e.cz>
Cc:	Hedi Berriche <hedi@....com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Serious problem with ticket spinlocks on ia64

On Mon, Aug 30, 2010 at 3:43 PM, Tony Luck <tony.luck@...el.com> wrote:
> Does Hedi's test fail for you if you drop the fancy ALAT trick?
> I.e. just use "serve = *p;" in __ticket_spin_lock()?

Answering my own question ... it failed in 47 minutes with the breakit
script on iteration 2812 :-(

So it would appear that the problem isn't related to the ALAT, or weird
compiler optimizations around the inline asm.

-Tony
--
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/