From: Steven Rostedt <rostedt@goodmis.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
samitolvanen@google.com, alxmtvv@gmail.com,
linux-kbuild@vger.kernel.org, yamada.masahiro@socionext.com,
akpm@linux-foundation.org, Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 11/21] trace: Use -mcount-record for dynamic ftrace
Date: Tue, 1 May 2018 14:42:48 -0400 [thread overview]
Message-ID: <20180501144248.1fb71b20@gandalf.local.home> (raw)
In-Reply-To: <20171130192233.181dad47@gandalf.local.home>
On Thu, 30 Nov 2017 19:22:33 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:
> On Mon, 27 Nov 2017 13:34:13 -0800
> Andi Kleen <andi@firstfloor.org> wrote:
>
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > gcc 5 supports a new -mcount-record option to generate ftrace
> > tables directly. This avoids the need to run record_mcount
> > manually.
> >
> > Use this option when available.
> >
> > So far doesn't use -mcount-nop, which also exists now.
> >
> > This is needed to make ftrace work with LTO because the
> > normal record-mcount script doesn't run over the link
> > time output.
> >
> > It should also improve build times slightly in the general
> > case.
> >
> > Cc: rostedt@goodmis.org
> > Signed-off-by: Andi Kleen <ak@linux.intel.com>
> > ---
>
> Hi Andi,
>
> Thanks for sending this. I'm currently trying to catch up on all the
> changes that need to get into 4.15 and will be doing a bit of
> traveling.
>
> I plan on looking at this in a week or two, and add it to the 4.16
> queue.
>
Looks like it I forgot to add it to the queue (actually, I remember
having issues with that queue and restarted it), and this was dropped.
Adding it this time for 4.18
Sorry about that. :-/
-- Steve
next prev parent reply other threads:[~2018-05-01 18:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 21:34 Link time optimization for LTO/x86 Andi Kleen
2017-11-27 21:34 ` [PATCH 01/21] x86/xen: Mark pv stub assembler symbol visible Andi Kleen
2017-11-27 21:34 ` [PATCH 02/21] afs: Fix const confusion in AFS Andi Kleen
2017-11-27 21:34 ` [PATCH 03/21] x86/timer: Don't inline __const_udelay Andi Kleen
2017-11-27 21:34 ` [PATCH 04/21] locking/spinlocks: Mark spinlocks noinline when inline spinlocks are disabled Andi Kleen
2017-11-27 21:34 ` [PATCH 05/21] x86/kvm: Make steal_time visible Andi Kleen
2017-11-27 21:34 ` [PATCH 06/21] x86/syscalls: Make x86 syscalls use real prototypes Andi Kleen
2017-11-27 21:34 ` [PATCH 07/21] x86: Make exception handler functions visible Andi Kleen
2017-11-27 21:34 ` [PATCH 08/21] x86/idt: Make const __initconst Andi Kleen
2017-11-27 21:34 ` [PATCH 09/21] lto: Use C version for SYSCALL_ALIAS Andi Kleen
2017-11-27 21:34 ` [PATCH 10/21] Fix read buffer overflow in delta-ipc Andi Kleen
2017-11-27 21:34 ` [PATCH 11/21] trace: Use -mcount-record for dynamic ftrace Andi Kleen
2017-12-01 0:22 ` Steven Rostedt
2018-05-01 18:42 ` Steven Rostedt [this message]
2017-11-27 21:34 ` [PATCH 12/21] ftrace: Mark function tracer test functions noinline/noclone Andi Kleen
2017-11-27 21:34 ` [PATCH 13/21] ftrace: Disable LTO for ftrace self tests Andi Kleen
2017-11-27 21:34 ` [PATCH 14/21] lto, fs: Avoid static variable in linux/fs.h Andi Kleen
2017-11-27 21:34 ` [PATCH 15/21] lto, x86, mm: Disable vmalloc BUILD_BUG_ON for LTO Andi Kleen
2017-11-27 21:34 ` [PATCH 16/21] lto: Add __noreorder and mark initcalls __noreorder Andi Kleen
2017-11-27 21:34 ` [PATCH 17/21] lto, workaround: Disable LTO for BPF Andi Kleen
2017-11-27 21:34 ` [PATCH 18/21] lto, crypto: Disable LTO for camelia glue Andi Kleen
2017-11-27 21:34 ` [PATCH 19/21] lto, x86: Disable LTO for realmode / vDSO / head64 Andi Kleen
2017-11-27 21:34 ` [PATCH 20/21] Kbuild, lto: Add Link Time Optimization support Andi Kleen
2018-01-27 0:15 ` Arnd Bergmann
2018-01-27 0:55 ` Andi Kleen
2018-01-27 14:26 ` Arnd Bergmann
2018-01-28 18:33 ` Andi Kleen
2017-11-27 21:34 ` [PATCH 21/21] x86: Enable Link Time Optimization Andi Kleen
2017-11-28 16:04 ` [PATCH 02/21] afs: Fix const confusion in AFS David Howells
2017-11-28 16:50 ` Andi Kleen
2017-11-29 23:09 ` Link time optimization for LTO/x86 Sami Tolvanen
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