From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: omap4-panda-es boot issues with v3.15-rc4 Date: Thu, 08 May 2014 15:15:23 -0700 Message-ID: <7hha4zsyro.fsf@paris.lan> References: <536B7E44.2040303@ti.com> <7hppjos2w2.fsf@paris.lan> <20140508165558.GB2198@atomide.com> <20140508184055.GC2198@atomide.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail-pa0-f52.google.com ([209.85.220.52]:60813 "EHLO mail-pa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932095AbaEHWPZ (ORCPT ); Thu, 8 May 2014 18:15:25 -0400 Received: by mail-pa0-f52.google.com with SMTP id kx10so3465034pab.11 for ; Thu, 08 May 2014 15:15:25 -0700 (PDT) In-Reply-To: <20140508184055.GC2198@atomide.com> (Tony Lindgren's message of "Thu, 8 May 2014 11:40:56 -0700") Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Tony Lindgren Cc: Roger Quadros , "Menon, Nishanth" , Grygorii Strashko , "Shilimkar, Santosh" , Paul Walmsley , Taras Kondratiuk , "linux-omap@vger.kernel.org" , Linux ARM Kernel Mailing List , "Kristo, Tero" , Paul Burton , Daniel Lezcano , "Rafael J. Wysocki" Tony Lindgren writes: [...] > ..but I think I found the cause for recent hangs on panda, just a wild > guess based on looking at the recent cpuidle patches after v3.14. > > Looks like reverting 0b89e9aa2856 (cpuidle: delay enabling interrupts > until all coupled CPUs leave idle) makes booting work reliably again > on panda. > > Can you guys confirm, so far no issues here after few boot tests, > but it might be too early to tell. Reverting that makes things a bit more stable, but it still eventually fails in the same way. For me it took 8 boots for it to eventually fail. However, if I build with CONFIG_CPU_IDLE=n, it becomes much more stable (20+ boots in a row and still going.) Kevin From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@linaro.org (Kevin Hilman) Date: Thu, 08 May 2014 15:15:23 -0700 Subject: omap4-panda-es boot issues with v3.15-rc4 In-Reply-To: <20140508184055.GC2198@atomide.com> (Tony Lindgren's message of "Thu, 8 May 2014 11:40:56 -0700") References: <536B7E44.2040303@ti.com> <7hppjos2w2.fsf@paris.lan> <20140508165558.GB2198@atomide.com> <20140508184055.GC2198@atomide.com> Message-ID: <7hha4zsyro.fsf@paris.lan> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Tony Lindgren writes: [...] > ..but I think I found the cause for recent hangs on panda, just a wild > guess based on looking at the recent cpuidle patches after v3.14. > > Looks like reverting 0b89e9aa2856 (cpuidle: delay enabling interrupts > until all coupled CPUs leave idle) makes booting work reliably again > on panda. > > Can you guys confirm, so far no issues here after few boot tests, > but it might be too early to tell. Reverting that makes things a bit more stable, but it still eventually fails in the same way. For me it took 8 boots for it to eventually fail. However, if I build with CONFIG_CPU_IDLE=n, it becomes much more stable (20+ boots in a row and still going.) Kevin