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From: "Luis R. Rodriguez" <mcgrof@suse.com>
To: Stuart Hayes <stuart.w.hayes@gmail.com>
Cc: tglx@linutronix.de, mingo@redhat.com,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org, prarit@redhat.com,
	mcgrof@do-not-panic.com, Toshi Kani <toshi.kani@hp.com>
Subject: Re: Fwd: [PATCH] x86: Use larger chunks in mtrr_cleanup
Date: Thu, 3 Sep 2015 04:45:42 +0200	[thread overview]
Message-ID: <20150903024542.GS8051@wotan.suse.de> (raw)
In-Reply-To: <55E47B4D.1050103@gmail.com>

On Mon, Aug 31, 2015 at 11:05:33AM -0500, Stuart Hayes wrote:
> Increase the range of chunk sizes tried in mtrr_cleanup() so it is able
> to map large memory configs into MTRRs.
> 
> Currently, mtrr_cleanup() will fail with large memory configurations,
> because it limits chunk_size to 2GB, which means that each MTRR can only
> cover 2GB of memory.  With a memory size of, say, 256GB, and ten variable
> MTRRs (such as some recent Intel CPUs have), it is not possible to set up
> the MTRRs to cover all of memory.

Linux drivers no longer use MTRR so why is the cleanup needed, ie, what would
happen if the cleanup is just skipped in your case ?

  Luis

  reply	other threads:[~2015-09-03  2:45 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <55E477DE.2060106@gmail.com>
2015-08-31 16:05 ` Stuart Hayes
2015-09-03  2:45   ` Luis R. Rodriguez [this message]
2015-09-03 12:17     ` Prarit Bhargava
2015-09-03 17:59       ` Luis R. Rodriguez
2015-09-03 18:10         ` Prarit Bhargava
2015-09-03 18:40           ` Luis R. Rodriguez
2015-09-03 19:22             ` Toshi Kani
2015-09-03 19:51               ` Luis R. Rodriguez
2015-09-03 21:31                 ` Toshi Kani
2015-09-03 22:07                   ` Luis R. Rodriguez
2015-09-03 22:25                     ` Toshi Kani
2015-09-03 22:45                       ` Luis R. Rodriguez
2015-09-03 23:21                         ` Toshi Kani
2015-09-03 23:54                           ` Luis R. Rodriguez
2015-09-04  0:48                             ` Toshi Kani
2015-09-04  1:40                               ` Luis R. Rodriguez
2015-09-04 14:56                                 ` Toshi Kani
2015-09-04  6:51                             ` Jan Beulich
2015-09-14 14:46       ` Stuart Hayes
2015-11-05 19:14         ` Yinghai Lu
2015-11-05 19:43           ` Luis R. Rodriguez
2016-03-16 20:20             ` Luis R. Rodriguez
2016-03-29 17:07               ` Luis R. Rodriguez

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