From: Arnd Bergmann <arnd@arndb•de>
To: cbe-oss-dev@ozlabs•org
Cc: linuxppc-dev@ozlabs•org, Paul Mackerras <paulus@samba•org>,
linux-kernel@vger•kernel.org,
Arnd Bergmann <arnd.bergmann@de•ibm.com>
Subject: [PATCH 12/22] spufs: always map local store non-guarded
Date: Mon, 20 Nov 2006 18:45:06 +0100 [thread overview]
Message-ID: <20061120180524.546658000@arndb.de> (raw)
In-Reply-To: 20061120174454.067872000@arndb.de
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>
---
Index: linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/file.c
+++ linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
@@ -105,11 +105,11 @@ spufs_mem_mmap_nopage(struct vm_area_str
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);
}
--
next prev parent reply other threads:[~2006-11-20 17:45 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-20 17:44 [PATCH 00/22] Cell patches for 2.6.20 Arnd Bergmann
2006-11-20 17:44 ` [PATCH 01/22] powerpc: convert idle_loop to use hard_irq_disable() Arnd Bergmann
2006-11-20 21:59 ` Paul Mackerras
2006-11-21 0:53 ` Benjamin Herrenschmidt
2006-11-21 10:14 ` Arnd Bergmann
2006-11-21 16:58 ` Olof Johansson
2006-11-20 17:44 ` [PATCH 02/22] powerpc: change ppc_rtas declaration to weak Arnd Bergmann
2006-11-20 17:44 ` [PATCH 03/22] spufs: Change %llx to 0x%llx Arnd Bergmann
2006-11-20 17:44 ` [PATCH 04/22] spufs: add /lslr, /dma_info and /proxydma files Arnd Bergmann
2006-11-20 17:44 ` [PATCH 05/22] spufs: Remove /spu_tag_mask file Arnd Bergmann
2006-11-20 17:45 ` [PATCH 06/22] spufs: implement /mbox_info, /ibox_info, and /wbox_info Arnd Bergmann
2006-11-20 17:45 ` [PATCH 07/22] spufs: read from signal files only if data is there Arnd Bergmann
2006-11-20 17:45 ` [PATCH 08/22] spufs: replace spu.nid with spu.node Arnd Bergmann
2006-11-20 17:45 ` [PATCH 09/22] spufs: return correct event for data storage interrupt Arnd Bergmann
2006-11-20 17:45 ` [PATCH 10/22] spufs: fix missing stop-and-signal Arnd Bergmann
2006-11-20 17:45 ` [PATCH 11/22] spufs: avoid user-triggered oops in ptrace Arnd Bergmann
2006-11-20 17:45 ` Arnd Bergmann [this message]
2006-11-20 17:45 ` [PATCH 13/22] spufs: fix return value of spufs_mfc_write Arnd Bergmann
2006-11-20 17:45 ` [PATCH 14/22] spufs: use SPU master control to prevent wild SPU execution Arnd Bergmann
2007-03-01 6:18 ` Michael Ellerman
2007-03-01 13:50 ` [Cbe-oss-dev] " Arnd Bergmann
2007-03-02 10:13 ` Michael Ellerman
2007-03-05 1:02 ` Arnd Bergmann
2007-03-07 8:58 ` Michael Ellerman
2006-11-20 17:45 ` [PATCH 15/22] spufs: Add runcntrl read accessors Arnd Bergmann
2006-11-20 17:45 ` [PATCH 16/22] spufs: load isolation kernel from spu_run Arnd Bergmann
2006-11-20 17:45 ` [PATCH 17/22] coredump: Add SPU elf notes to coredump Arnd Bergmann
2006-11-21 5:38 ` Michael Ellerman
2006-11-20 17:45 ` [PATCH 18/22] cell: add symbol exports for oprofile Arnd Bergmann
2006-11-20 17:45 ` [PATCH 19/22] cell: PMU register macros Arnd Bergmann
2006-11-20 17:45 ` [PATCH 20/22] cell: Move PMU-related stuff to include/asm-powerpc/cell-pmu.h Arnd Bergmann
2006-11-20 17:45 ` [PATCH 21/22] cell: add routines for managing PMU interrupts Arnd Bergmann
2006-11-20 17:45 ` [PATCH 22/22] cell: add oprofile support Arnd Bergmann
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