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Re: [Xen-devel] ptep_set_access_flags() using UVMF_MULTI?

  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Tue, 13 Mar 2007 12:09:52 +0000
  • Delivery-date: Tue, 13 Mar 2007 05:09:09 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdlaIEVv4IrB9FbEduMWwAX8io7RQ==
  • Thread-topic: [Xen-devel] ptep_set_access_flags() using UVMF_MULTI?

On 13/3/07 11:14, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> Why is this so when the touched mm is active, even though the alternative
> case and native only use flush_tlb_page() (i.e. only flush the local tlb)?
> Thanks, Jan

We don't need any more flushing than native. Perhaps the original native
code did a cross-TLBs flush and that got reduced in more recent kernels but
the Xen code didn't get modified? Anyway, please send a patch.

 -- Keir

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