linux-kernel - Re: [RFC/PATCH 2/3] recordmcount: Record locations of __aeabi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151124010442.GP19156@codeaurora.org>
Date:	Mon, 23 Nov 2015 17:04:42 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Måns Rullgård <mans@...sr.com>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nico@...xnic.net>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [RFC/PATCH 2/3] recordmcount: Record locations of
 __aeabi_{u}idiv() calls on ARM

On 11/23, Russell King - ARM Linux wrote:
> On Mon, Nov 23, 2015 at 01:16:01PM -0800, Stephen Boyd wrote:
> > Thanks. I don't see the prints on my system even with this config
> > on top of allyesconfig. Odd.
> 
> Hmm.
> 
> It could be because I use ccache in hardlink mode to avoid the disk
> overhead of having two copies and having to duplicate the file
> contents.
> 
> If the kernel build thinks it can modify an object file in place, it
> will lead to this, as it will end up modifying the stored ccache
> file unless it specifically breaks the hardlink.
> 

That sounds very possible. I'd have to get ccache setup with
hardlinks to test out your theory. 

Is it supported to use ccache with hardlinks to build the kernel?
The ccache documentation makes it sounds like it will confuse
make and isn't a good idea.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/