From: Borislav Petkov <bp@alien8.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Lukasz Anaczkowski <lukasz.anaczkowski@intel.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
tglx@linutronix.de, mingo@redhat.com, ak@linux.intel.com,
kirill.shutemov@linux.intel.com, mhocko@suse.com,
akpm@linux-foundation.org, harish.srinivasappa@intel.com,
lukasz.odzioba@intel.com, grzegorz.andrejczuk@intel.com,
lukasz.daniluk@intel.com
Subject: Re: [PATCH v2] Linux VM workaround for Knights Landing A/D leak
Date: Tue, 14 Jun 2016 22:47:36 +0200 [thread overview]
Message-ID: <20160614204736.GL30015@pd.tnic> (raw)
In-Reply-To: <4b2c481e-35ae-1cd6-ca58-1535bfef346c@zytor.com>
On Tue, Jun 14, 2016 at 01:20:06PM -0700, H. Peter Anvin wrote:
> static_cpu_has_bug() should turn into 5-byte NOP in the common (bugless)
> case.
Yeah, it does. I looked at the asm.
I wasn't 100% sure because I vaguely remember gcc reordering things in
some pathological case but I'm most likely remembering wrong because if
it were doing that, then the whole nopping out won't work. F'get about
it. :)
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2016-06-14 20:47 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-14 15:58 [PATCH] " Lukasz Anaczkowski
2016-06-14 16:31 ` kbuild test robot
2016-06-14 16:47 ` Nadav Amit
2016-06-14 16:54 ` Anaczkowski, Lukasz
2016-06-14 17:01 ` [PATCH v2] " Lukasz Anaczkowski
2016-06-14 17:24 ` Dave Hansen
2016-06-14 18:34 ` One Thousand Gnomes
2016-06-14 18:54 ` Dave Hansen
2016-06-14 19:19 ` Borislav Petkov
2016-06-14 20:20 ` H. Peter Anvin
2016-06-14 20:47 ` Borislav Petkov [this message]
2016-06-14 20:54 ` H. Peter Anvin
2016-06-14 21:02 ` Borislav Petkov
2016-06-14 21:08 ` H. Peter Anvin
2016-06-14 21:13 ` H. Peter Anvin
2016-06-14 18:10 ` Borislav Petkov
2016-06-15 13:12 ` Anaczkowski, Lukasz
2016-06-14 18:38 ` Nadav Amit
2016-06-15 13:12 ` Anaczkowski, Lukasz
2016-06-15 20:04 ` Nadav Amit
2016-06-15 20:10 ` Dave Hansen
2016-06-15 20:26 ` Nadav Amit
2016-06-16 15:14 ` [PATCH v3] " Lukasz Anaczkowski
2016-06-16 16:43 ` Nadav Amit
2016-06-16 20:23 ` Dave Hansen
2016-06-14 17:18 ` [PATCH] " Dave Hansen
2016-06-14 20:16 ` Nadav Amit
2016-06-14 21:37 ` Dave Hansen
2016-06-15 2:20 ` Andy Lutomirski
2016-06-15 2:35 ` Nadav Amit
2016-06-15 2:36 ` Andy Lutomirski
2016-06-15 2:44 ` Nadav Amit
2016-06-15 3:09 ` Andy Lutomirski
2016-06-15 3:20 ` Nadav Amit
2016-06-14 16:58 ` kbuild test robot
2016-06-14 17:19 ` Dave Hansen
2016-06-15 13:06 ` Anaczkowski, Lukasz
2016-06-14 17:47 ` kbuild test robot
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