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SubjectRe: [PATCH] - Reduce TLB flushing during process migration
On Wed, Jun 23, 2004 at 02:33:18PM -0700, Andrew Morton wrote:
> Jack Steiner <steiner@sgi.com> wrote:
> >
> > This patch adds a platform specific hook to allow an arch-specific
> > function to be called after an explicit migration.
>
> OK by me. David, could you please merge this up?
>
> Jack, please prepare an update for Documentation/cachetlb.txt.




Signed-off-by: Jack Steiner <steiner@sgi.com>




--- linuxbase/Documentation/cachetlb.txt 2004-06-22 07:15:46.000000000 -0500
+++ linux/Documentation/cachetlb.txt 2004-06-24 07:54:50.000000000 -0500
@@ -132,6 +132,17 @@
translations for software managed TLB configurations.
The sparc64 port currently does this.

+7) void tlb_migrate_finish(struct mm_struct *mm)
+
+ This interface is called at the end of an explicit
+ process migration. This interface provides a hook
+ to allow a platform to update TLB or context-specific
+ information for the address space.
+
+ The ia64 sn2 platform is one example of a platform
+ that uses this interface.
+
+
Next, we have the cache flushing interfaces. In general, when Linux
is changing an existing virtual-->physical mapping to a new value,
the sequence will be in one of the following forms:
--
Thanks

Jack Steiner (steiner@sgi.com) 651-683-5302
Principal Engineer SGI - Silicon Graphics, Inc.


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