Messages in this thread | | | From | "Pallipadi, Venkatesh" <> | Date | Fri, 29 Aug 2008 15:55:43 -0700 | Subject | RE: Out of mtrrs |
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>-----Original Message----- >From: linux-kernel-owner@vger.kernel.org >[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of "J.A. >Magallón" >Sent: Friday, August 29, 2008 8:33 AM >To: Linux-Kernel >Subject: Out of mtrrs > >Hi all... > >I'm using the xorg intel driver, and drm/X report it has no free mtrrs >in kernel to set up: > >one:~# cat /proc/mtrr >reg00: base=0xfffe0000 (4095MB), size= 128KB: write-protect, count=1 >reg01: base=0xfffc0000 (4095MB), size= 128KB: uncachable, count=1 >reg02: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1 >reg03: base=0x10000000 ( 256MB), size= 256MB: write-back, count=1 >reg04: base=0x1f800000 ( 504MB), size= 8MB: uncachable, count=1 >reg05: base=0x1f600000 ( 502MB), size= 2MB: uncachable, count=1 >reg06: base=0x1f500000 ( 501MB), size= 1MB: uncachable, count=1 >reg07: base=0x00000000 ( 0MB), size= 128KB: uncachable, count=1 > >dmesg: > >[drm] Initialized i915 1.6.0 20060119 on minor 0 >mtrr: no more MTRRs available > >one:/var/log# grep Linear x.log >(--) intel(0): Linear framebuffer at 0x20000000 > >I think X tries to get a mtrr at 0x20000000, but kernel has no free one >to offer. > >Does this have any solution ? >
One of the main motivations to add PAT support was this kind of errors. With PAT aware X, this will no longer be a problem as X will map this using PAT APIs.
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