From: Borislav Petkov <bp@alien8.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 00/12] x86, alternatives: Instruction padding and more robust JMPs
Date: Tue, 24 Feb 2015 12:04:55 +0100 [thread overview]
Message-ID: <20150224110455.GD3420@pd.tnic> (raw)
In-Reply-To: <20150218212013.GB22696@gmail.com>
On Wed, Feb 18, 2015 at 10:20:13PM +0100, Ingo Molnar wrote:
> Do you have any stats about how many such (affected) patch
> sites we have in say the 64-bit defconfig kernel?
It is a good thing I have a tool to dump the alternatives patch sites
and what gets replaced by what. Because now I can create such stats just
like that! And hpa was questioning that tool's justification at the time
:-)
Anyway, here are the stats:
x86_64 defconfig:
Alternatives sites total: 2478
Total padding added (in Bytes): 6051
The padding is currently done for:
X86_FEATURE_ALWAYS
X86_FEATURE_ERMS
X86_FEATURE_LFENCE_RDTSC
X86_FEATURE_MFENCE_RDTSC
X86_FEATURE_SMAP
This is with the latest version of the patchset. Of course, on each
machine the alternatives sites actually being patched are a subset of
the total number.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
prev parent reply other threads:[~2015-02-24 11:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-03 18:16 [PATCH v1 00/12] x86, alternatives: Instruction padding and more robust JMPs Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 01/12] x86, copy_user: Remove FIX_ALIGNMENT define Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 02/12] x86, alternatives: Cleanup DPRINTK macro Borislav Petkov
2015-02-03 19:01 ` Joe Perches
2015-02-03 18:16 ` [PATCH v1 03/12] x86, alternatives: Add instruction padding Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 04/12] x86, alternatives: Make JMPs more robust Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 05/12] x86, alternatives: Use optimized NOPs for padding Borislav Petkov
2015-02-03 19:36 ` Andy Lutomirski
2015-02-03 19:54 ` Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 06/12] x86, copy_page_64.S: Use generic ALTERNATIVE macro Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 07/12] x86, copy_user_64.S: Convert to ALTERNATIVE_2 Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 08/12] x86, SMAP: Use ALTERNATIVE macro Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 09/12] x86, alternative: Convert X86_INVD_BUG to generic macro Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 10/12] x86, alternatives: Convert clear_page_64.S Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 11/12] x86, alternative: Use alternative_2 in rdtsc_barrier Borislav Petkov
2015-02-03 19:55 ` Andy Lutomirski
2015-02-03 20:08 ` Borislav Petkov
2015-02-03 18:16 ` [PATCH v1 12/12] x86, alternative: Cleanup prefetch primitives Borislav Petkov
2015-02-18 21:20 ` [PATCH v1 00/12] x86, alternatives: Instruction padding and more robust JMPs Ingo Molnar
2015-02-18 21:23 ` Borislav Petkov
2015-02-24 11:04 ` Borislav Petkov [this message]
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