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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20100902002641.GI18967@zorg.emea.sgi.com>
Date:	Thu, 2 Sep 2010 01:26:41 +0100
From:	Hedi Berriche <hedi@....com>
To:	Tony Luck <tony.luck@...el.com>
Cc:	Petr Tesarik <ptesarik@...e.cz>,
	"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 Thu, Sep 02, 2010 at 00:10 Tony Luck wrote:
| More results from other experiments ...
| 
| 1) It occurred to me that I should check that these test cases weren't
| hitting some other problem in 2.6.36-rc3. So I ported the 64-bit
| version of ticket locks to the current kernel and ran the stress test.
| It was still going strong at 16 hours (where all my other experiments
| tend to fail at 90 minutes or less).

This is consistent with the bisection that led me to the 4 bytes ticket
locks commit.

| Summary: the only change that helps is the 64-bit ticket locks.

Ditto.

Cheers,
Hedi.
-- 
Hedi Berriche
Global Product Support
http://www.sgi.com/support
--
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/