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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 3/4] x86/unwind/orc: Skip sorting if BUILDTIME_ORCTABLE_SORT is configured
Date: Thu,  7 Nov 2019 22:32:04 +0800	[thread overview]
Message-ID: <20191107143205.206606-4-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>

The orc_unwind and orc_unwind_ip tables are sorted at build time if
BUILDTIME_ORCTABLE_SORT is configured, skip sort at boot time.

Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com>
---
 arch/x86/kernel/unwind_orc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/unwind_orc.c b/arch/x86/kernel/unwind_orc.c
index 332ae6530fa8..2c2fa9ef116e 100644
--- a/arch/x86/kernel/unwind_orc.c
+++ b/arch/x86/kernel/unwind_orc.c
@@ -273,9 +273,11 @@ void __init unwind_init(void)
 		return;
 	}
 
+#ifndef CONFIG_BUILDTIME_ORCTABLE_SORT
 	/* Sort the .orc_unwind and .orc_unwind_ip tables: */
 	sort(__start_orc_unwind_ip, num_entries, sizeof(int), orc_sort_cmp,
 	     orc_sort_swap);
+#endif
 
 	/* Initialize the fast lookup table: */
 	lookup_num_blocks = orc_lookup_end - orc_lookup;
-- 
2.24.0.rc2


  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 ` shile.zhang [this message]
2019-11-07 14:32 ` [RFC PATCH 4/4] x86/Kconfig: Add a Kconfig option to sort ORC tables at build time shile.zhang
2019-11-07 15:22 ` [RFC PATCH 0/4] Speed booting by sorting ORC unwind " 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

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