xen: clarify locking used when pinning a pagetable.

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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>

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Jeremy Fitzhardinge 2008-08-19 13:32:51 -07:00 • committed by Ingo Molnar

parent 63d3a75d6f

commit 11ad93e59d

1 changed files with 35 additions and 6 deletions

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arch/x86/xen/mmu.c

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