linux-kernel - Re: [RFC PATCH] ARM: UNWINDER_FRAME

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Message-ID: <20190807102935.GE10425@arm.com>
Date:   Wed, 7 Aug 2019 11:29:37 +0100
From:   Dave Martin <Dave.Martin@....com>
To:     Nathan Huckleberry <nhuck@...gle.com>
Cc:     Tri Vo <trong@...gle.com>, linux@...linux.org.uk,
        linux-kernel@...r.kernel.org,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH] ARM: UNWINDER_FRAME_POINTER implementation for Clang

On Tue, Aug 06, 2019 at 02:29:16PM -0700, Nathan Huckleberry wrote:
> I'm not sure that we should disable a broken feature instead of
> attempting a fix.
> 
> CONFIG_FUNCTION_GRAPH_TRACER is dependent on CONFIG_FRAME_POINTER and
> there have been reports by MediaTek that the frame pointer unwinder is
> faster in some cases.

Fair enough, just wanted to be sure we weren't doing something pointless.

[...]

Cheers
---Dave