From: Meelis Roos <mroos@linux.ee>
To: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: strange MTRR on 2.6.29-git
Date: Wed, 1 Apr 2009 17:25:40 +0300 (EEST) [thread overview]
Message-ID: <Pine.SOC.4.64.0904011722350.14173@math.ut.ee> (raw)
In-Reply-To: <Pine.SOC.4.64.0904011711210.5672@math.ut.ee>
> Found this on todays 2.6.29 + git. The same address range has both WB
> and UC MTRR-s.
>
> reg00: base=0x000000000 ( 0MB), size= 512MB, count=1: write-back
> reg01: base=0x020000000 ( 512MB), size= 1MB, count=1: write-back
> reg02: base=0x020000000 ( 512MB), size= 1MB, count=1: uncachable
> reg03: base=0x0f2000000 ( 3872MB), size= 32MB, count=2: write-combining
> reg04: base=0x0f8000000 ( 3968MB), size= 64MB, count=1: write-combining
Actually, these double MTRR-s for the range @ 512M are there long time.
Testbooted 2.6.20 that is the earliest kernel I have around here and
this conflicting double MTRR is still there, so it's not a recent
change. In 2.6.20 reg04 was not present but that's probably unimportant
since reg01 and reg02 are the same.
--
Meelis Roos (mroos@linux.ee)
next prev parent reply other threads:[~2009-04-01 14:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-01 14:13 Meelis Roos
2009-04-01 14:25 ` Meelis Roos [this message]
2009-04-01 18:43 ` Yinghai Lu
2009-04-05 7:12 ` Meelis Roos
2009-04-05 13:41 ` Ingo Molnar
2009-04-05 20:05 ` H. Peter Anvin
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