From: shile.zhang@linux.alibaba.com
To: Masahiro Yamada <yamada.masahiro@socionext.com>,
Michal Marek <michal.lkml@markovi.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Josh Poimboeuf <jpoimboe@redhat.com>,
x86@kernel.org
Cc: "H . Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
Shile Zhang <shile.zhang@linux.alibaba.com>
Subject: [RFC PATCH 4/4] x86/Kconfig: Add a Kconfig option to sort ORC tables at build time
Date: Thu, 7 Nov 2019 22:32:05 +0800 [thread overview]
Message-ID: <20191107143205.206606-5-shile.zhang@linux.alibaba.com> (raw)
In-Reply-To: <20191107143205.206606-1-shile.zhang@linux.alibaba.com>
From: Shile Zhang <shile.zhang@linux.alibaba.com>
Add a new Kconfig BUILDTIME_ORCTABLE_SORT to control the ORC unwind
tables at build time. Select for ORC unwinder on x86_64 by default.
Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com>
---
arch/x86/Kconfig.debug | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index bf9cd83de777..320ff2af4837 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -335,6 +335,15 @@ config UNWINDER_GUESS
endchoice
+config BUILDTIME_ORCTABLE_SORT
+ bool "Sort ORC unwind tables at build time"
+ depends on X86_64
+ depends on UNWINDER_ORC
+ default y
+ help
+ This option enables the build-time sorting for ORC unwind tables. It
+ can help to speed up kernel boot by skip the runtime sorting.
+
config FRAME_POINTER
depends on !UNWINDER_ORC && !UNWINDER_GUESS
bool
--
2.24.0.rc2
next prev parent reply other threads:[~2019-11-07 14:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 14:32 [RFC PATCH 0/4] Speed booting by sorting ORC unwind tables at build time shile.zhang
2019-11-07 14:32 ` [RFC PATCH 1/4] scripts: Add sortorctable to sort ORC unwind tables shile.zhang
2019-11-07 14:32 ` [RFC PATCH 2/4] kbuild: Sort ORC unwind tables in vmlinux link process shile.zhang
2019-11-07 14:32 ` [RFC PATCH 3/4] x86/unwind/orc: Skip sorting if BUILDTIME_ORCTABLE_SORT is configured shile.zhang
2019-11-07 14:32 ` shile.zhang [this message]
2019-11-07 15:22 ` [RFC PATCH 0/4] Speed booting by sorting ORC unwind tables at build time Peter Zijlstra
2019-11-08 1:42 ` Shile Zhang
2019-11-08 9:21 ` Peter Zijlstra
2019-11-08 9:25 ` Peter Zijlstra
2019-11-11 2:44 ` Shile Zhang
2019-11-07 15:46 ` Josh Poimboeuf
2019-11-08 1:43 ` Shile Zhang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191107143205.206606-5-shile.zhang@linux.alibaba.com \
--to=shile.zhang@linux.alibaba.com \
--cc=bp@alien8.de \
--cc=hpa@zytor.com \
--cc=jpoimboe@redhat.com \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=michal.lkml@markovi.net \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=yamada.masahiro@socionext.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox