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xen: clarify locking used when pinning a pagetable.
authorJeremy Fitzhardinge <jeremy@goop.org>
Tue, 19 Aug 2008 20:32:51 +0000 (13:32 -0700)
committerIngo Molnar <mingo@elte.hu>
Wed, 20 Aug 2008 10:40:08 +0000 (12:40 +0200)
Add some comments explaining the locking and pinning algorithm when
using split pte locks.  Also implement a minor optimisation of not
pinning the PTE when not using split pte locks.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

No differences found
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