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# --- SDE-COPYRIGHT-NOTE-BEGIN ---
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# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
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#
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# Filename: package/.../linux26-rt/sparc64-video.patch
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# Copyright (C) 2007 The OpenSDE Project
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# Copyright (C) 2006 The T2 SDE Project
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#
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# More information can be found in the files COPYING and README.
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#
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# This patch file is dual-licensed. It is available under the license the
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# patched project is licensed under, as long as it is an OpenSource license
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# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
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# of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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# --- SDE-COPYRIGHT-NOTE-END ---
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In 2.6.17 sparc64 kernels, X11 runs _extremely_ slowly with
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frequent lock-up like behaviour on my Ultra5 (ATI Mach64).
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I finally managed to trace the cause to this change in 2.6.16-git6:
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- Mikael Pettersson <mikpe@it.uu.se>
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Confirmed to fix ATi@U5 and Creator@U30.
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- Rene Rebe <rene@exactcode.de>
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--- a/arch/sparc64/mm/generic.c
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+++ b/arch/sparc64/mm/generic.c
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@@ -140,6 +144,7 @@ int io_remap_pfn_range(struct vm_area_st
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vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
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vma->vm_pgoff = phys_base >> PAGE_SHIFT;
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+ prot = __pgprot(pg_iobits);
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offset -= from;
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dir = pgd_offset(mm, from);
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flush_cache_range(vma, beg, end);
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