From: Arnd Bergmann <arnd@arndb.de> To: Takahiro Akashi <takahiro.akashi@linaro.org> Cc: "rostedt@goodmis.org" <rostedt@goodmis.org>, "Frédéric Weisbecker" <fweisbec@gmail.com>, mingo <mingo@redhat.com>, "Catalin Marinas" <catalin.marinas@arm.com>, "Will Deacon" <will.deacon@arm.com>, "gkulkarni@caviumnetworks.com" <gkulkarni@caviumnetworks.com>, "Bird, Tim" <tim.bird@sonymobile.com>, "arndb@arndb.de" <arndb@arndb.de>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "Patch Tracking" <patches@linaro.org> Subject: Re: [PATCH v3 1/6] arm64: Add ftrace support Date: Wed, 12 Feb 2014 12:03:11 +0100 [thread overview] Message-ID: <201402121203.11657.arnd@arndb.de> (raw) In-Reply-To: <CAB5YjtCr2KL_q1FF8kO_VKe+feg7f9qFRKtwf3xj2h0ENwuB5g@mail.gmail.com> On Wednesday 12 February 2014, Takahiro Akashi wrote: > > If I build a large "randconfig" kernel or "allyesconfig", the kernel image > > size exceeds 32MB, which means I can no longer link callers with a 26 > > bit signed immediate argument like the "bl _mcount" here. For any other > > function calls, "gcc -mlong-calls" can be used to work around this, but > > this particular instance is created by inserting assembly statements > > into the output without considering the long-call options. Is there > > a way to get the kernel to link anyway? > > I hope that this won't happen on arm64 because a branch offset range is > +/- 128MB. Yes, we should be safe for the next decade on arm64. My question was really about arm32 here, hoping someone has an idea. > > > +#ifdef CONFIG_FUNCTION_GRAPH_TRACER > > > > Here, again, you an remove the #ifdef by making the entire file built > > only for CONFIG_FUNCTION_GRAPH_TRACER. > > You're right as far as patch [1/6] is concerned, but once patch [2/6] is > applied, > this file (ftrace.c) may be compiled even if CONFIG_FUNCTION_GRAPH_TRACER > is not enabled. (That is CONFIG_DYNAMIC_FTRACE.) > Sorry for any confusion by poorly-divided patchset. No, that was my fault. I saw it later after I had already sent out the message. Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/6] arm64: Add ftrace support Date: Wed, 12 Feb 2014 12:03:11 +0100 [thread overview] Message-ID: <201402121203.11657.arnd@arndb.de> (raw) In-Reply-To: <CAB5YjtCr2KL_q1FF8kO_VKe+feg7f9qFRKtwf3xj2h0ENwuB5g@mail.gmail.com> On Wednesday 12 February 2014, Takahiro Akashi wrote: > > If I build a large "randconfig" kernel or "allyesconfig", the kernel image > > size exceeds 32MB, which means I can no longer link callers with a 26 > > bit signed immediate argument like the "bl _mcount" here. For any other > > function calls, "gcc -mlong-calls" can be used to work around this, but > > this particular instance is created by inserting assembly statements > > into the output without considering the long-call options. Is there > > a way to get the kernel to link anyway? > > I hope that this won't happen on arm64 because a branch offset range is > +/- 128MB. Yes, we should be safe for the next decade on arm64. My question was really about arm32 here, hoping someone has an idea. > > > +#ifdef CONFIG_FUNCTION_GRAPH_TRACER > > > > Here, again, you an remove the #ifdef by making the entire file built > > only for CONFIG_FUNCTION_GRAPH_TRACER. > > You're right as far as patch [1/6] is concerned, but once patch [2/6] is > applied, > this file (ftrace.c) may be compiled even if CONFIG_FUNCTION_GRAPH_TRACER > is not enabled. (That is CONFIG_DYNAMIC_FTRACE.) > Sorry for any confusion by poorly-divided patchset. No, that was my fault. I saw it later after I had already sent out the message. Arnd
next prev parent reply other threads:[~2014-02-12 11:04 UTC|newest] Thread overview: 235+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-10-24 7:08 [PATCH v2 0/6] arm64: Add ftrace support AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 1/6] " AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 2/6] arm64: ftrace: Add dynamic " AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 3/6] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 4/6] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 5/6] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2013-10-24 7:08 ` [PATCH v2 6/6] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 0/6] arm64: Add ftrace support AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 1/6] " AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-10 15:03 ` Arnd Bergmann 2014-02-10 15:03 ` Arnd Bergmann 2014-02-10 15:19 ` Steven Rostedt 2014-02-10 15:19 ` Steven Rostedt [not found] ` <CAB5YjtCr2KL_q1FF8kO_VKe+feg7f9qFRKtwf3xj2h0ENwuB5g@mail.gmail.com> 2014-02-12 11:03 ` Arnd Bergmann [this message] 2014-02-12 11:03 ` Arnd Bergmann 2014-02-17 18:12 ` Will Deacon 2014-02-17 18:12 ` Will Deacon 2014-02-19 10:46 ` AKASHI Takahiro 2014-02-19 10:46 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 2/6] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 3/6] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 4/6] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 5/6] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-17 19:29 ` Will Deacon 2014-02-17 19:29 ` Will Deacon 2014-02-19 10:48 ` AKASHI Takahiro 2014-02-19 10:48 ` AKASHI Takahiro 2014-02-07 10:18 ` [PATCH v3 6/6] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-02-07 10:18 ` AKASHI Takahiro 2014-02-10 14:21 ` [PATCH v3 0/6] arm64: Add ftrace support Kulkarni, Ganapatrao 2014-02-10 14:21 ` Kulkarni, Ganapatrao 2014-02-25 9:23 ` [PATCH v4 0/7] " AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 1/7] " AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 15:38 ` Kulkarni, Ganapatrao 2014-02-25 15:38 ` Kulkarni, Ganapatrao 2014-02-28 5:06 ` AKASHI Takahiro 2014-02-28 5:06 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 2/7] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 3/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 4/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 5/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 6/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-25 9:23 ` [PATCH v4 7/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro 2014-02-25 9:23 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 0/7] arm64: Add ftrace support AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 1/7] " AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 2/7] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 3/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 4/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 5/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 6/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-02-28 5:18 ` [PATCH v5 7/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro 2014-02-28 5:18 ` AKASHI Takahiro 2014-03-11 14:35 ` [PATCH v5 0/7] arm64: Add ftrace support Will Deacon 2014-03-11 14:35 ` Will Deacon 2014-03-12 1:47 ` AKASHI Takahiro 2014-03-12 1:47 ` AKASHI Takahiro 2014-03-12 1:58 ` Steven Rostedt 2014-03-12 1:58 ` Steven Rostedt 2014-03-12 2:02 ` Steven Rostedt 2014-03-12 2:02 ` Steven Rostedt 2014-03-13 10:13 ` [PATCH v6 " AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 10:13 ` [PATCH v6 1/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 12:19 ` Will Deacon 2014-03-13 12:19 ` Will Deacon 2014-03-13 10:13 ` [PATCH v6 2/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 12:19 ` Will Deacon 2014-03-13 12:19 ` Will Deacon 2014-03-13 10:13 ` [PATCH v6 3/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 12:38 ` Will Deacon 2014-03-13 12:38 ` Will Deacon 2014-03-13 14:57 ` AKASHI Takahiro 2014-03-13 14:57 ` AKASHI Takahiro 2014-03-13 16:05 ` Will Deacon 2014-03-13 16:05 ` Will Deacon 2014-03-13 10:13 ` [PATCH v6 4/7] arm64: Add ftrace support AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 17:08 ` Will Deacon 2014-03-13 17:08 ` Will Deacon 2014-03-13 18:27 ` Steven Rostedt 2014-03-13 18:27 ` Steven Rostedt 2014-03-13 18:37 ` Will Deacon 2014-03-13 18:37 ` Will Deacon 2014-03-13 18:49 ` Steven Rostedt 2014-03-13 18:49 ` Steven Rostedt 2014-03-14 4:45 ` AKASHI Takahiro 2014-03-14 4:45 ` AKASHI Takahiro 2014-03-14 10:07 ` Will Deacon 2014-03-14 10:07 ` Will Deacon 2014-03-14 16:13 ` AKASHI Takahiro 2014-03-14 16:13 ` AKASHI Takahiro 2014-03-13 10:13 ` [PATCH v6 5/7] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 18:10 ` Will Deacon 2014-03-13 18:10 ` Will Deacon 2014-03-13 18:33 ` Steven Rostedt 2014-03-13 18:33 ` Steven Rostedt 2014-03-14 5:28 ` AKASHI Takahiro 2014-03-14 5:28 ` AKASHI Takahiro 2014-03-14 5:26 ` AKASHI Takahiro 2014-03-14 5:26 ` AKASHI Takahiro 2014-03-13 10:13 ` [PATCH v6 6/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 15:54 ` Will Deacon 2014-03-13 15:54 ` Will Deacon 2014-03-13 18:07 ` Steven Rostedt 2014-03-13 18:07 ` Steven Rostedt 2014-03-14 4:55 ` AKASHI Takahiro 2014-03-14 4:55 ` AKASHI Takahiro 2014-03-14 3:00 ` AKASHI Takahiro 2014-03-14 3:00 ` AKASHI Takahiro 2014-03-14 10:09 ` Will Deacon 2014-03-14 10:09 ` Will Deacon 2014-03-14 16:15 ` AKASHI Takahiro 2014-03-14 16:15 ` AKASHI Takahiro 2014-03-13 10:13 ` [PATCH v6 7/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-03-13 10:13 ` AKASHI Takahiro 2014-03-13 16:25 ` Will Deacon 2014-03-13 16:25 ` Will Deacon 2014-03-14 3:50 ` AKASHI Takahiro 2014-03-14 3:50 ` AKASHI Takahiro 2014-03-15 5:40 ` [PATCH v7 0/7] arm64: Add ftrace support AKASHI Takahiro 2014-03-15 5:40 ` AKASHI Takahiro 2014-03-15 5:40 ` [PATCH v7 1/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro 2014-03-15 5:40 ` AKASHI Takahiro 2014-03-15 5:40 ` [PATCH v7 2/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-03-15 5:40 ` AKASHI Takahiro 2014-03-15 5:40 ` [PATCH v7 3/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-03-15 5:40 ` AKASHI Takahiro 2014-04-16 13:31 ` Will Deacon 2014-04-16 13:31 ` Will Deacon 2014-04-30 9:54 ` [PATCH v8 0/8] arm64: Add ftrace support AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 1/8] ftrace: make CALLER_ADDRx macros more generic AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-05-02 18:13 ` Will Deacon 2014-05-02 18:13 ` Will Deacon 2014-05-02 19:02 ` Steven Rostedt 2014-05-02 19:02 ` Steven Rostedt 2014-05-02 19:03 ` Steven Rostedt 2014-05-02 19:03 ` Steven Rostedt 2014-05-02 19:19 ` Steven Rostedt 2014-05-02 19:19 ` Steven Rostedt 2014-05-12 15:58 ` Will Deacon 2014-05-12 15:58 ` Will Deacon 2014-05-12 16:05 ` Steven Rostedt 2014-05-12 16:05 ` Steven Rostedt 2014-05-12 16:12 ` Will Deacon 2014-05-12 16:12 ` Will Deacon 2014-05-12 17:23 ` Steven Rostedt 2014-05-12 17:23 ` Steven Rostedt 2014-05-20 11:29 ` AKASHI Takahiro 2014-05-20 11:29 ` AKASHI Takahiro 2014-05-20 11:31 ` [PATCH v8_1] " AKASHI Takahiro 2014-05-20 11:31 ` AKASHI Takahiro 2014-06-11 12:34 ` [PATCH v8 1/8] " Geert Uytterhoeven 2014-06-11 12:34 ` Geert Uytterhoeven 2014-06-11 12:34 ` Geert Uytterhoeven 2014-06-11 13:23 ` [PATCH] arm/ftrace: Fix function_return_addr() to function_return_address() Steven Rostedt 2014-06-11 13:23 ` Steven Rostedt 2014-06-11 13:23 ` Steven Rostedt 2014-06-11 13:38 ` Geert Uytterhoeven 2014-06-11 13:38 ` Geert Uytterhoeven 2014-06-11 13:38 ` Geert Uytterhoeven 2014-06-11 13:44 ` Steven Rostedt 2014-06-11 13:44 ` Steven Rostedt 2014-06-11 13:44 ` Steven Rostedt 2014-04-30 9:54 ` [PATCH v8 2/8] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 3/8] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 4/8] ftrace: Add arm64 support to recordmcount AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 5/8] arm64: Add ftrace support AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-05-28 20:19 ` Mark Brown 2014-05-28 20:19 ` Mark Brown 2014-05-29 8:07 ` Will Deacon 2014-05-29 8:07 ` Will Deacon 2014-05-29 9:47 ` Mark Brown 2014-05-29 9:47 ` Mark Brown 2014-04-30 9:54 ` [PATCH v8 6/8] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 7/8] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-04-30 9:54 ` [PATCH v8 8/8] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-04-30 9:54 ` AKASHI Takahiro 2014-03-15 5:45 ` [PATCH v7 4/7] arm64: Add ftrace support AKASHI Takahiro 2014-03-15 5:45 ` AKASHI Takahiro 2014-04-16 13:45 ` Will Deacon 2014-04-16 13:45 ` Will Deacon 2014-03-15 5:45 ` [PATCH v7 5/7] arm64: ftrace: Add dynamic " AKASHI Takahiro 2014-03-15 5:45 ` AKASHI Takahiro 2014-04-16 13:48 ` Will Deacon 2014-04-16 13:48 ` Will Deacon 2014-03-15 5:45 ` [PATCH v7 6/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro 2014-03-15 5:45 ` AKASHI Takahiro 2014-04-16 13:52 ` Will Deacon 2014-04-16 13:52 ` Will Deacon 2014-04-28 10:41 ` AKASHI Takahiro 2014-04-28 10:41 ` AKASHI Takahiro 2014-05-27 13:10 ` [for-next][PATCH] ftrace: Make CALLER_ADDRx macros more generic Steven Rostedt 2014-05-27 13:10 ` Steven Rostedt 2014-05-27 18:49 ` Will Deacon 2014-05-27 18:49 ` Will Deacon 2014-05-29 5:27 ` AKASHI Takahiro 2014-05-29 5:27 ` AKASHI Takahiro 2014-05-29 8:10 ` Will Deacon 2014-05-29 8:10 ` Will Deacon 2014-03-15 5:45 ` [PATCH v7 7/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro 2014-03-15 5:45 ` AKASHI Takahiro
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