From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hedi Berriche Date: Thu, 02 Sep 2010 00:26:41 +0000 Subject: Re: Serious problem with ticket spinlocks on ia64 Message-Id: <20100902002641.GI18967@zorg.emea.sgi.com> List-Id: References: <201008271537.35709.ptesarik@suse.cz> <987664A83D2D224EAE907B061CE93D53015D91D6F5@orsmsx505.amr.corp.intel.com> <987664A83D2D224EAE907B061CE93D53015D9B14DC@orsmsx505.amr.corp.intel.com> <201008302341.14312.ptesarik@suse.cz> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Tony Luck Cc: Petr Tesarik , "linux-ia64@vger.kernel.org" , "linux-kernel@vger.kernel.org" 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