From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey.Brodkin@synopsys.com (Alexey Brodkin) Date: Fri, 1 Sep 2017 11:48:09 +0000 Subject: [PATCH] arc: Re-enable MMU upon die() In-Reply-To: References: List-ID: Message-ID: <1504266488.15144.3.camel@synopsys.com> To: linux-snps-arc@lists.infradead.org Hi Jose, On Fri, 2017-09-01@12:39 +0100, Jose Abreu wrote: > I recently came upon a scenario where I would get a double fault > after a machine check error. It turns out that for Ksymbol lookup > to work with modules we need to have MMU enabled because module > address is mapped in the cached space. > > This patch re-enables the MMU before start printing the stacktrace > making stacktracing of modules work upon a fatal exception. I'm wondering how do we end up with MMU disabled?