From: Andi Kleen <andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org>
To: Vince Weaver <vincent.weaver-e7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
Cc: Stephane Eranian
<eranian-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Jiri Olsa <jolsa-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Michael Kerrisk (man-pages)"
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Peter Zijlstra
<a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org>,
Paul Mackerras <paulus-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Arnaldo Carvalho de Melo
<acme-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Chuck Ebbert
<cebbert.lkml-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andi Kleen <andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org>
Subject: Re: [patch] perf_event_open.2: 3.19 PERF_SAMPLE_REGS_INTR support
Date: Mon, 2 Mar 2015 23:58:07 +0100 [thread overview]
Message-ID: <20150302225807.GJ823@two.firstfloor.org> (raw)
In-Reply-To: <alpine.DEB.2.11.1503021721090.20187-6xBS8L8d439fDsnSvq7Uqyn2WXadKZNJe7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
> do not enable REGS_USER and REG_INTR at the same time
> as REGS_USER will have REG_INTR values and
> cannot be used for user stack unwinding
If that's true it would be a bug. But I doubt it.
The PEBS handler sets up its own pt_regs, so they should
be independent.
-Andi
--
ak-VuQAYsv1563Yd54FQh9/CA@public.gmane.org -- Speaking for myself only.
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: Stephane Eranian <eranian@google.com>,
Jiri Olsa <jolsa@redhat.com>,
"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
linux-man@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Chuck Ebbert <cebbert.lkml@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [patch] perf_event_open.2: 3.19 PERF_SAMPLE_REGS_INTR support
Date: Mon, 2 Mar 2015 23:58:07 +0100 [thread overview]
Message-ID: <20150302225807.GJ823@two.firstfloor.org> (raw)
In-Reply-To: <alpine.DEB.2.11.1503021721090.20187@vincent-weaver-1.umelst.maine.edu>
> do not enable REGS_USER and REG_INTR at the same time
> as REGS_USER will have REG_INTR values and
> cannot be used for user stack unwinding
If that's true it would be a bug. But I doubt it.
The PEBS handler sets up its own pt_regs, so they should
be independent.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2015-03-02 22:58 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-12 5:33 [patch] perf_event_open.2: 3.19 PERF_SAMPLE_REGS_INTR support Vince Weaver
2015-02-12 5:33 ` Vince Weaver
[not found] ` <alpine.DEB.2.11.1502120031150.17793-6xBS8L8d439fDsnSvq7Uqyn2WXadKZNJe7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
2015-02-17 5:33 ` Michael Kerrisk (man-pages)
2015-02-17 5:33 ` Michael Kerrisk (man-pages)
2015-02-26 7:51 ` Michael Kerrisk (man-pages)
2015-02-28 22:26 ` Jiri Olsa
2015-02-28 22:26 ` Jiri Olsa
2015-03-01 14:14 ` Stephane Eranian
[not found] ` <CABPqkBQQ3JZp_BdwRJDEGpyqrchixfGG_1Lqh88HJtzXWOGE7Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-02 19:31 ` Vince Weaver
2015-03-02 19:31 ` Vince Weaver
2015-03-02 20:26 ` Stephane Eranian
2015-03-02 21:19 ` Vince Weaver
2015-03-02 21:22 ` Stephane Eranian
2015-03-02 22:23 ` Vince Weaver
[not found] ` <alpine.DEB.2.11.1503021721090.20187-6xBS8L8d439fDsnSvq7Uqyn2WXadKZNJe7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
2015-03-02 22:30 ` Stephane Eranian
2015-03-02 22:30 ` Stephane Eranian
2015-03-02 22:58 ` Andi Kleen [this message]
2015-03-02 22:58 ` Andi Kleen
[not found] ` <20150302225807.GJ823-1g7Xle2YJi4/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2015-03-06 18:37 ` Vince Weaver
2015-03-06 18:37 ` Vince Weaver
[not found] ` <alpine.DEB.2.11.1503061332150.25334-6xBS8L8d439fDsnSvq7Uqyn2WXadKZNJe7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
2015-03-06 19:51 ` Stephane Eranian
2015-03-06 19:51 ` Stephane Eranian
2015-03-06 23:05 ` Andi Kleen
2015-03-06 23:05 ` Andi Kleen
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