linux-kernel - Re: [PATCH PATCH 8/9] x86/bugs: Declutter vulnerable CPU list

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Message-ID: <20240618031924.be57xugsmcq4kmxh@desk>
Date: Mon, 17 Jun 2024 20:19:24 -0700
From: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: "Hansen, Dave" <dave.hansen@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"daniel.sneddon@...ux.intel.com" <daniel.sneddon@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	"andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>
Subject: Re: [PATCH PATCH 8/9] x86/bugs: Declutter vulnerable CPU list

On Tue, Jun 18, 2024 at 12:08:18AM +0000, Luck, Tony wrote:
> > $ size vmlinux.before vmlinux.after
> > text		data		bss		dec		hex	filename
> > 33128289        23039446        19767300        75935035        486ad3b vmlinux.before
> > 33128289        23039446        19767300        75935035        486ad3b vmlinux.after
> 
> Same size != same contents.

Right. I did get that thought, but did not act on it :\

> What if you:
> 
> $ cmp -l arch/x86/kernel/cpu/before-common.o arch/x86/kernel/cpu/after-common.o
> 
> Or
> 
> $ diff <(objdump -d arch/x86/kernel/cpu/before-common.o) <(objdump -d arch/x86/kernel/cpu/after-common.o)

Thanks for pointers. I am not seeing any difference in the disassembly too.