From: Jeff Dike <jdike@addtoit.com>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org,
user-mode-linux-devel@lists.sourceforge.net,
bcrl@linux.intel.com
Subject: [uml-devel] [PATCH 7/10] UML - switch_mm fix
Date: Sun, 30 Oct 2005 23:39:40 -0500 [thread overview]
Message-ID: <200510310439.j9V4des7000867@ccure.user-mode-linux.org> (raw)
From: Ben Lahaise <bcrl@linux.intel.com>
Not quite, something along the lines of the patch below works correctly
(and makes aio performance not suffer from multiple second delays), as
skas0 mode correctly switches mm contexts, unlike TT (which should
probably get nuked from the kernel now that skas0 seems to be working).
-ben
Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Index: linux-2.6.13-mm1/include/asm-um/mmu_context.h
===================================================================
--- linux-2.6.13-mm1.orig/include/asm-um/mmu_context.h 2005-09-01 16:03:21.000000000 -0400
+++ linux-2.6.13-mm1/include/asm-um/mmu_context.h 2005-09-07 12:21:22.000000000 -0400
@@ -29,7 +29,8 @@
* possible.
*/
if (old != new && (current->flags & PF_BORROWED_MM))
- force_flush_all();
+ CHOOSE_MODE(force_flush_all(),
+ switch_mm_skas(&new->context.skas.id));
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
-------------------------------------------------------
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reply other threads:[~2005-10-31 3:46 UTC|newest]
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