From: Michal Hocko <mhocko@kernel.org>
To: Jiri Kosina <jikos@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Dave Hansen <dave.hansen@intel.com>,
Andi Kleen <ak@linux.intel.com>, Borislav Petkov <bp@suse.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH] l1tf: drop the swap storage limit restriction when l1tf=off
Date: Mon, 19 Nov 2018 14:51:49 +0100 [thread overview]
Message-ID: <20181119135149.GN22247@dhcp22.suse.cz> (raw)
In-Reply-To: <nycvar.YFH.7.76.1811191436140.21108@cbobk.fhfr.pm>
On Mon 19-11-18 14:36:32, Jiri Kosina wrote:
> On Wed, 14 Nov 2018, Michal Hocko wrote:
>
> > > > + It also drops the swap size and available
> > > > + RAM limit restriction.
> > >
> > > Minor nit: I think this should explicitly mention that those two things
> > > are related to bare metal mitigation, to avoid any confusion (as otherwise
> > > the l1tf cmdline parameter is purely about hypervisor mitigations).
> >
> > Do you have any specific wording in mind?
> >
> > It also drops the swap size and available RAM limit restrictions on both
> > hypervisor and bare metal.
> >
> > Sounds better?
> >
> > > With that
> > >
> > > Acked-by: Jiri Kosina <jkosina@suse.cz>
> >
> > Thanks!
>
> Yes, I think that makes it absolutely clear. Thanks,
OK. Here is the incremental diff on top of the patch. I will fold and
repost later this week. I assume people are still catching up after LPC
and I do not want to spam them even more.
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a54f2bd39e77..c5aa4b4a797d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2096,7 +2096,8 @@
Disables hypervisor mitigations and doesn't
emit any warnings.
It also drops the swap size and available
- RAM limit restriction.
+ RAM limit restriction on both hypervisor and
+ bare metal.
Default is 'flush'.
diff --git a/Documentation/admin-guide/l1tf.rst b/Documentation/admin-guide/l1tf.rst
index b00464a9c09c..2e65e6cb033e 100644
--- a/Documentation/admin-guide/l1tf.rst
+++ b/Documentation/admin-guide/l1tf.rst
@@ -405,7 +405,8 @@ The kernel command line allows to control the L1TF mitigations at boot
off Disables hypervisor mitigations and doesn't emit any
warnings.
- It also drops the swap size and available RAM limit restrictions.
+ It also drops the swap size and available RAM limit restrictions
+ on both hypervisor and bare metal.
============ =============================================================
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-11-19 13:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-13 18:49 [PATCH] l1tf: drop the swap storage limit restriction when l1tf=off Michal Hocko
2018-11-13 19:20 ` Pavel Tatashin
2018-11-13 19:56 ` Jiri Kosina
2018-11-14 7:32 ` Michal Hocko
2018-11-19 13:36 ` Jiri Kosina
2018-11-19 13:51 ` Michal Hocko [this message]
2018-12-09 20:46 ` Jiri Kosina
2018-12-10 20:03 ` Michal Hocko
2018-11-15 0:27 ` Andi Kleen
2018-12-10 21:09 ` [tip:x86/pti] x86/speculation/l1tf: Drop " tip-bot for Michal Hocko
2018-12-11 9:00 ` Ingo Molnar
2018-12-11 10:47 ` Thomas Gleixner
2018-12-11 11:13 ` Michal Hocko
2018-12-11 10:36 ` tip-bot for Michal Hocko
2018-12-11 10:51 ` tip-bot for Michal Hocko
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