Bug 485872
| Summary: | [drm] MTRR allocation failed | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Mace Moneta <moneta.mace> | ||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | rawhide | CC: | kernel-maint, quintela, tbzatek | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2009-02-21 23:16:30 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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I booted with kernel option "enable_mtrr_cleanup" and the MTRR now has an appropriate write-combining range: reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back reg01: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back reg02: base=0x0bde00000 ( 3038MB), size= 2MB, count=1: uncachable reg03: base=0x0be000000 ( 3040MB), size= 32MB, count=1: uncachable reg04: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back reg05: base=0x200000000 ( 8192MB), size= 1024MB, count=1: write-back reg06: base=0x0d0000000 ( 3328MB), size= 256MB, count=1: write-combining Xorg.0.log says: (--) PCI:*(0@0:2:0) Intel Corporation 4 Series Chipset Integrated Graphics Controller rev 3, Mem @ 0xfe400000/4194304, 0xd0000000/268435456, I/O @ 0x0000cc00/8, BIOS @ 0x????????/131072 But there is no change in performance. Glxgears, for example, is about 45% slower than F10. With recent updates and the enable_mtrr_cleanup option, performance is back within a few percent of F10. Closing. |
Created attachment 332181 [details] Dmesg Description of problem: Running rawhide on a Supermicro C2SEA motherboard, 8GB RAM, G45/X4500HD. No xorg.conf. Graphics performance is slow. I noticed in /var/log/messages: Feb 16 23:54:33 slayer kernel:[drm] Initialized drm 1.1.0 20060810 Feb 16 23:54:33 slayer kernel:mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining Feb 16 23:54:33 slayer kernel:[drm] MTRR allocation failed Feb 16 23:54:33 slayer kernel:. Graphics performance may suffer. Version-Release number of selected component (if applicable): kernel-2.6.29-0.122.rc5.fc11.x86_64 How reproducible: Always Steps to Reproduce: 1.Boot 2.Login 3.Slow video Actual results: Slow video Expected results: Fast video Additional info: The kernel doesn't always boot successfully, but that's a separate issue.