From: Ingo Molnar <mingo@elte.hu>
To: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
lkml <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Jim Keniston <jkenisto@us.ibm.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Christoph Hellwig <hch@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Anders Kaseorg <andersk@ksplice.com>,
Tim Abbott <tabbott@ksplice.com>,
systemtap <systemtap@sources.redhat.com>,
DLE <dle-develop@lists.sourceforge.net>
Subject: Re: [RFC][ PATCH -tip v2 0/7] kprobes: Kprobes jump optimization support
Date: Tue, 23 Jun 2009 19:40:00 -0000 [thread overview]
Message-ID: <20090623194009.GA8777@elte.hu> (raw)
In-Reply-To: <4A40E153.9030704@redhat.com>
* Masami Hiramatsu <mhiramat@redhat.com> wrote:
> Ingo Molnar wrote:
> > * Masami Hiramatsu <mhiramat@redhat.com> wrote:
> >
> >> o Usage
> >> Set CONFIG_OPTPROBES=y when building a kernel, then all *probes will be
> >> optimized if possible.
> >
> > Should be default-y if KPROBES is enabled. I.e. we really only want
> > to disable it to debug potential issues.
>
> Sure, thanks!
Plus i'd suggest a runtime control (a sysctl) as well - if it's not
too intrusive. Since this is an optional speedup feature, distros
can have this enabled and if there's some problem with it then it
can still be disabled in sysctl.conf, without having to rebuild the
kernel.
Ingo
next prev parent reply other threads:[~2009-06-23 19:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-22 21:20 Masami Hiramatsu
2009-06-22 21:20 ` [RFC][ PATCH -tip v2 2/7] kprobes: introducing generic insn_slot framework Masami Hiramatsu
2009-06-27 20:09 ` Steven Rostedt
2009-06-29 21:06 ` Masami Hiramatsu
2009-06-22 21:20 ` [RFC][ PATCH -tip v2 7/7] kprobes: add documents of jump optimization Masami Hiramatsu
2009-06-22 21:20 ` [RFC][ PATCH -tip v2 6/7] kprobes: x86: support kprobes jump optimization on x86 Masami Hiramatsu
2009-06-22 21:20 ` [RFC][ PATCH -tip v2 3/7] Kbuild: disable gcc crossjumping Masami Hiramatsu
2009-06-27 20:13 ` Steven Rostedt
2009-07-17 20:28 ` Sam Ravnborg
2009-07-17 21:12 ` Masami Hiramatsu
2009-07-17 21:14 ` Masami Hiramatsu
2009-07-17 21:19 ` Sam Ravnborg
2009-06-22 21:20 ` [RFC][ PATCH -tip v2 1/7] kprobes: use list instead of hlist for insn_pages Masami Hiramatsu
2009-06-22 21:47 ` [RFC][ PATCH -tip v2 5/7] kprobes: x86: cleanup save/restore registers Masami Hiramatsu
2009-06-22 21:47 ` [RFC][ PATCH -tip v2 4/7] kprobes: kprobes jump optimization core Masami Hiramatsu
2009-06-23 12:58 ` Srikar Dronamraju
2009-06-23 13:10 ` Masami Hiramatsu
2009-06-23 11:43 ` [RFC][ PATCH -tip v2 0/7] kprobes: Kprobes jump optimization support Ingo Molnar
2009-06-23 14:05 ` Masami Hiramatsu
2009-06-23 19:40 ` Ingo Molnar [this message]
2009-06-23 21:52 ` Masami Hiramatsu
2009-06-23 22:05 ` Masami Hiramatsu
2009-06-23 12:09 ` Andi Kleen
2009-06-23 13:49 ` Masami Hiramatsu
2009-06-23 16:35 ` Andi Kleen
2009-06-23 17:26 ` Masami Hiramatsu
2009-06-23 20:37 ` Andi Kleen
2009-06-23 20:46 ` Masami Hiramatsu
2009-06-26 23:17 ` Masami Hiramatsu
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