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From: mark gross <mgross@linux.intel.com>
To: speck@linutronix.de
Subject: [MODERATED] Re: [PATCH 2/3] V5 more sampling fun 2
Date: Mon, 6 Apr 2020 13:56:40 -0700	[thread overview]
Message-ID: <20200406205640.GB6917@mtg-dev.jf.intel.com> (raw)
In-Reply-To: <20200406183756.GA182004@kroah.com>

On Mon, Apr 06, 2020 at 08:37:56PM +0200, speck for Greg KH wrote:
> On Mon, Apr 06, 2020 at 11:34:17AM -0700, speck for Kees Cook wrote:
> > > +			By default, this issue is mitigated by
> > > +			microcode.  However, the microcode fix can cause
> > > +			the RDRAND and RDSEED instructions to become
> > > +			much slower.  Among other effects, this will
> > > +			result in reduced throughput from /dev/urandom.
> > 
> > This is this true about /dev/urandom? I thought the RDRAND dependency
> > had been removed?
> 
> That dependancy will be removed in 5.7-rc1 and I will be backporting
> that to the stable kernels "soon".
>
FWIW I'm back porting Thomas' X86_MATCH clean up series to the LTS kernels
today/tomorow.  Let me know if someone has beaten me to it.

I'm hoping to take it back to 4.4 ATM I have v5.6.y, v5.5.y, and v5.4.y done so
far.

--mark

  reply	other threads:[~2020-04-06 20:56 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-06 17:52 [MODERATED] [PATCH 0/3] V5 more sampling fun 0 mark gross
2020-01-16 22:16 ` [MODERATED] [PATCH 2/3] V5 more sampling fun 2 mark gross
2020-01-30 19:12 ` [MODERATED] [PATCH 3/3] V5 more sampling fun 3 mark gross
2020-03-17  0:56 ` [MODERATED] [PATCH 1/3] V5 more sampling fun 1 mark gross
     [not found] ` <5e8b7166.1c69fb81.4c99a.3619SMTPIN_ADDED_BROKEN@mx.google.com>
2020-04-06 18:31   ` [MODERATED] " Kees Cook
     [not found] ` <5e8b71d8.1c69fb81.64075.43abSMTPIN_ADDED_BROKEN@mx.google.com>
2020-04-06 18:34   ` [MODERATED] Re: [PATCH 2/3] V5 more sampling fun 2 Kees Cook
2020-04-06 18:37     ` Greg KH
2020-04-06 20:56       ` mark gross [this message]
2020-04-06 22:14       ` Luck, Tony
2020-04-07  7:51         ` Greg KH
2020-04-06 18:52     ` mark gross
     [not found] ` <5e8b71af.1c69fb81.d8b8.ac6bSMTPIN_ADDED_BROKEN@mx.google.com>
2020-04-06 18:34   ` [MODERATED] Re: [PATCH 3/3] V5 more sampling fun 3 Kees Cook
2020-04-06 22:07 ` [MODERATED] Re: [PATCH 2/3] V5 more sampling fun 2 Josh Poimboeuf
2020-04-07  0:34   ` mark gross
2020-04-07 12:39     ` Josh Poimboeuf
2020-04-08 20:26       ` mark gross
2020-04-08 22:14   ` mark gross
2020-04-08 22:58     ` mark gross
2020-04-07 15:17 ` Thomas Gleixner
2020-04-08 20:33   ` [MODERATED] " mark gross
2020-04-08 23:21     ` Thomas Gleixner

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