From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Fri, 8 Jan 2016 09:10:14 -0800 Subject: [PATCH 2/2] memory: omap-gpmc: Add Kconfig option for debug In-Reply-To: <568F4596.8020206@gmail.com> References: <20160105224929.GF12777@atomide.com> <20160106174039.GA14271@earth> <20160106174713.GL12777@atomide.com> <568D5669.4040801@gmail.com> <20160106182650.GM12777@atomide.com> <568D5F54.7040900@gmail.com> <20160107180700.GN12777@atomide.com> <568EDC8D.7070205@gmail.com> <20160108022619.GS12777@atomide.com> <568F4596.8020206@gmail.com> Message-ID: <20160108171013.GW12777@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Ivaylo Dimitrov [160107 21:14]: > Hi > > On 8.01.2016 04:26, Tony Lindgren wrote: > > > >Yes it seems there's some other issue too. Maybe you can run git bisect > >again and carry the fix along as an extra patch? > > No sane way to bisect, I don't really know what triggers the issue. Neither > it is triggered regularly. It might happen on the first reboot or on the > tenth, or ... And it looks like the problems happens sometimes on oops too. > Not to say that it seems I should have fully booted userspace (so there is > enough pressure on the ubi/mdt/nand subsystems), which is impossible with > upstream without some n900 specific patches :( Hmm OK. Can you check if disabling deeper idle states helps? Just set the UART timeouts to -1. You may also want to disable off mode with echo 0 > /sys/kernel/debug/pm_debug/enable_off_mode. If it happens during booting, chances are idle is not even hit though. > Maybe we can get some ideas on what and where to look from ubifs people? > Though I don't know whom to cc, feel free to help :) > > My best bet aiui, is comparing what nokia omap1 kernel does vs upstream. Or > looking at the commit log in ubi/mtd/onenand - who knows, I might get lucky > once again the same way as with that phonet oops in > __netif_receive_skb_core. Well maybe we now have error messages that actually make sense? > >OK then it really seems like we do have another bug lurking around. > > :nod: I've sent out the pull request and Arnd pulled the fix into arm-soc so we should have it merged for v4.4 FYI. Regards, Tony