dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

[POWERPC] spufs: Always map local store non-guarded 

When fixing spufs to map the 'mem' file backing store cacheable,
I incorrectly set the physical mapping to use both cache-inhibited
and guarded mapping, which resulted in a serious performance
degradation.

Debugged-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Arnd Bergmann 2006-11-20 18:45:06 +01:00 committed by Paul Mackerras
parent 5c3ecd659b
commit 932f535dd4
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/platforms/cell/spufs/file.c
View File

@ -105,11 +105,11 @@ spufs_mem_mmap_nopage(struct vm_area_struct *vma,
if (ctx->state == SPU_STATE_SAVED) {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
& ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
& ~_PAGE_NO_CACHE);
page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
} else {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
| _PAGE_NO_CACHE);
page = pfn_to_page((ctx->spu->local_store_phys + offset)
>> PAGE_SHIFT);
}