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Date: Fri, 22 May 2020 13:28:15 -0500 From: Josh Poimboeuf <jpoimboe@...hat.com> To: Huaixin Chang <changhuaixin@...ux.alibaba.com> Cc: linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org, bp@...en8.de, hpa@...or.com, luto@...capital.net, michal.lkml@...kovi.net, mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de, x86@...nel.org, yamada.masahiro@...ionext.com Subject: Re: [PATCH 0/2] Build ORC fast lookup table in scripts/sorttable tool On Wed, Apr 29, 2020 at 02:46:24PM +0800, Huaixin Chang wrote: > Move building of fast lookup table from boot to sorttable tool. This saves us > 6380us boot time on Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz with cores. > > Huaixin Chang (2): > scripts/sorttable: Build orc fast lookup table via sorttable tool > x86/unwind/orc: Remove unwind_init() from x86 boot > > arch/x86/include/asm/unwind.h | 2 - > arch/x86/kernel/setup.c | 2 - > arch/x86/kernel/unwind_orc.c | 51 ---------------------- > scripts/sorttable.h | 99 ++++++++++++++++++++++++++++++++++++++++--- > 4 files changed, 92 insertions(+), 62 deletions(-) I tested this (rebased on tip/master), it seems to break ORC completely... e.g. /proc/self/stack is empty. -- Josh
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