From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.goquest.com (mail.goquest.com [63.172.73.8]) by dsl2.external.hp.com (Postfix) with SMTP id 8D8C54858 for ; Wed, 12 Jun 2002 07:54:10 -0600 (MDT) Content-Type: Multipart/Mixed; charset="iso-8859-1"; boundary="------------Boundary-00=_48ILNKL7Q657NL4ICRPL" From: Michael S.Zick To: parisc-linux@lists.parisc-linux.org Subject: Re: [parisc-linux] 2.4.18-pa35 SMP process hangs on a J200 Date: Wed, 12 Jun 2002 08:45:40 -0500 Cc: mszick@MoreThan.org References: <5BA66B90-7D12-11D6-B01F-0030656F07A2@esiee.fr> <20020611145848.GA2796@tausq.org> <02061113393800.04435@localhost.localdomain> In-Reply-To: <02061113393800.04435@localhost.localdomain> MIME-Version: 1.0 Message-Id: <02061208454000.00732@localhost.localdomain> Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: --------------Boundary-00=_48ILNKL7Q657NL4ICRPL Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit On Tuesday 11 June 2002 01:39 pm, Michael S. Zick wrote: > On Tuesday 11 June 2002 09:58 am, Randolph Chung wrote: > > think we are looking at multiple bugs here..... > > Very likely... Sirs... I now have a definate lead for the x86-SMP case, which might aid the troubleshooters in the pa-risc branch (diff's attached). Evidently, some code path is causing these portions of IRQ service to be entered with the IRQ state not as designed. These patches preserve callers interrupt state, eliminating the erratic behavior, which is only an artifact of the true cause. True cause still unknown. Additional note: On the HP models with the worst of the problems; is the physical_cpu_id and the logical_cpu_id a 1:1 mapping as it is on x86 systems? 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