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Date: Fri, 17 Jul 2020 11:06:31 +0200 (CEST) From: Miroslav Benes <mbenes@...e.cz> To: Mark Brown <broonie@...nel.org> cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>, Christian Borntraeger <borntraeger@...ibm.com>, Ingo Molnar <mingo@...nel.org>, Jiri Slaby <jirislaby@...nel.org>, x86@...nel.org, linux-arm-kernel@...ts.infradead.org, linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 3/3] arm64: stacktrace: Convert to ARCH_STACKWALK On Thu, 16 Jul 2020, Mark Brown wrote: > On Thu, Jul 16, 2020 at 01:56:13PM +0200, Miroslav Benes wrote: > > On Wed, 15 Jul 2020, Mark Brown wrote: > > > > -void save_stack_trace(struct stack_trace *trace) > > > -{ > > > - __save_stack_trace(current, trace, 0); > > > + walk_stackframe(task, &frame, consume_entry, cookie); > > > } > > > just an idea for further improvement (and it might be a matter of taste). > > Yeah, there's some more stuff that can be done - the reason I'm looking > at this code is to do reliable stack trace which is going to require at > least some changes to the actual unwinder, this just seemed like a > useful block moving things forwards in itself and I particularly wanted > feedback on patch 1. Understood. Reliable stack traces would be an important step for live patching on arm64, so I am looking forward to seeing that. Thanks Miroslav
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