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Fri, 04 Dec 2020 11:27:57 -0800 (PST) Received: from Red ([2a01:cb1d:3d5:a100:264b:feff:fe03:2806]) by smtp.googlemail.com with ESMTPSA id k16sm4684560wrl.65.2020.12.04.11.27.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Dec 2020 11:27:56 -0800 (PST) Date: Fri, 4 Dec 2020 20:27:53 +0100 From: Corentin Labbe To: Thomas Gleixner Cc: herbert@gondor.apana.org.au, mripard@kernel.org, wens@csie.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, Jens Axboe , linux-mm@kvack.org, Andrew Morton Subject: Re: crypto: sun4i-ss: error with kmap Message-ID: <20201204192753.GA19782@Red> References: <20201201135252.GA9584@Red> <87y2ihfw6z.fsf@nanos.tec.linutronix.de> <20201201144529.GA6786@Red> <87v9dlfthf.fsf@nanos.tec.linutronix.de> <20201202195501.GA29296@Red> <877dpzexfr.fsf@nanos.tec.linutronix.de> <20201203173846.GA16207@Red> <87r1o6bh1u.fsf@nanos.tec.linutronix.de> <20201204132631.GA25321@Red> <874kl1bod0.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <874kl1bod0.fsf@nanos.tec.linutronix.de> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Dec 04, 2020 at 04:08:27PM +0100, Thomas Gleixner wrote: > On Fri, Dec 04 2020 at 14:26, Corentin Labbe wrote: > > On Fri, Dec 04, 2020 at 12:34:05AM +0100, Thomas Gleixner wrote: > >> The unmap comes from sg_miter_stop() and looking at the previous > >> map/unmap cycles there are never nested maps. > >> > >> [ 996.943030] cryptset-316 0d..4 73943317us : __kmap_local_pfn_prot: kmap_local_pfn: 1 ffefd000 > >> > >> is the first event which allocates a nested map. > >> > >> So something goes south either in sg_miter or in the crypto maze. > >> > >> Enabling CONFIG_DEBUG_KMAP_LOCAL and function tracing might give us more clue. > > > > Done, http://kernel.montjoie.ovh/130466.log > > Does not provide more information with the debug enabled. So can you > please enable CONFIG_FUNCTION_TRACER and add 'ftrace=function' to the > command line? > Done, http://kernel.montjoie.ovh/130490.log