From 932f535dd4c83dc3eb631c2cee1dfd6ae289b88c Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 20 Nov 2006 18:45:06 +0100 Subject: [PATCH] [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 Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/cell/spufs/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c index 55d7e0f4bb3..1c1af71d19c 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -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); } -- 2.41.0