linux-kernel - Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support

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: <CALCETrUHiDqT+VRbdEnGsEkMFqQt+ZqX+RTenp1ets8XMhrQ2Q@mail.gmail.com>
Date:	Wed, 26 Feb 2014 11:25:41 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	David Ahern <dsahern@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support

On Wed, Feb 26, 2014 at 11:19 AM, David Ahern <dsahern@...il.com> wrote:
> On 2/26/14, 11:59 AM, Andy Lutomirski wrote:
>
>> I wonder if anyone who uses perf for userspace profiling *ever* uses
>> FP and gets away with it.  There's precious little userspace software
>> compiled with frame pointers these days on most architectures.
>
>
> yes and yes. With control over the entire stack we are making sure
> frame-pointers are enabled as much as possible.
>

I'm curious why.

Maybe this should be a config option.  Anyone using a standard distro
is running a nearly completely frame-pointer-omitted userspace these
days.

--Andy

>



-- 
Andy Lutomirski
AMA Capital Management, LLC
--
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/