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xen-ia64-devel
RE: [Xen-ia64-devel][PATCH]A small optimization on flushtlb.
Yes, I misunderstood it.
Please ignore this patch.
- Anthony
-----Original Message-----
From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
Sent: 2007年2月2日 15:33
To: Xu, Anthony
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-ia64-devel][PATCH]A small optimization on flushtlb.
On Fri, Feb 02, 2007 at 02:35:14PM +0800, Xu, Anthony wrote:
> A small optimization on flushtlb,
> Replace ia64_cmpxchg with ia64_fetch_and_add.
Hi Anthony.
This patch modifies its semantics.
When tlbflush_clock is 0, it must return 0 without increment.
I.e. "tlbflush_clock == 0" means the overflow is detected and
new_tlbflush_clock_period() may be flushing concurrently.
So tlbflush_clock must not be incremented until the completion of
new_tlbflush_clock_period()
--
yamahata
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