linux-kernel - Re: [PATCH v2] ARM: mm: Facilitate debugging CONFIG_KUSER

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Message-ID: <20181025192621.GB16785@lunn.ch>
Date:   Thu, 25 Oct 2018 21:26:21 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, ebiederm@...ssion.com,
        Russell King <linux@...linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Souptick Joarder <jrdr.linux@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ARM: mm: Facilitate debugging CONFIG_KUSER_HELPERS
 disabled

On Thu, Oct 25, 2018 at 12:01:08PM -0700, Florian Fainelli wrote:
> Some software such as perf makes unconditional use of the special
> [vectors] page which is only provided when CONFIG_KUSER_HELPERS is
> enabled in the kernel.
> 
> Facilitate the debugging of such situations by printing a debug message
> to the kernel log showing the task name and the faulting address.

Hi Florian

Nice. I wish we had this a couple of months ago.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

Thanks
    Andrew