From owner-freebsd-arm@FreeBSD.ORG Sun Dec 22 12:36:41 2013 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CA770940; Sun, 22 Dec 2013 12:36:41 +0000 (UTC) Received: from kanar.ci0.org (kanar.ci0.org [IPv6:2001:bc8:35e6::1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 671DC19C1; Sun, 22 Dec 2013 12:36:41 +0000 (UTC) Received: from kanar.ci0.org (pluxor@localhost [127.0.0.1]) by kanar.ci0.org (8.14.5/8.14.5) with ESMTP id rBMCabIE061215; Sun, 22 Dec 2013 13:36:37 +0100 (CET) (envelope-from mlfbsd@kanar.ci0.org) Received: (from mlfbsd@localhost) by kanar.ci0.org (8.14.5/8.14.5/Submit) id rBMCabop061214; Sun, 22 Dec 2013 13:36:37 +0100 (CET) (envelope-from mlfbsd) Date: Sun, 22 Dec 2013 13:36:37 +0100 From: Olivier Houchard To: Wojciech Macek Subject: Re: arm SMP on Cortex-A15 Message-ID: <20131222123636.GA61193@ci0.org> References: <20131220125638.GA5132@mail.bsdpad.com> <20131222092913.GA89153@mail.bsdpad.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-arm@freebsd.org, Ruslan Bukin X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Dec 2013 12:36:41 -0000 On Sun, Dec 22, 2013 at 11:53:47AM +0100, Wojciech Macek wrote: > Thanks, so it seems that there is still something wrong... > From what I observed, the place where you got the panic was the most likely > to fail if there are issues with TLB cache. I guess your case can also have > the same root case. Nevertheless, I'll try to reproduce your setup and > debug it futher. > > Regards, > Wojtek I'm quite sure Ruslan's panic happens because the VFP code isn't completely smp-safe, and I have patches that hopefully fixes this. Regards, Olivier