RE: [Xen-ia64-devel][PATCH] workaround for itr_d

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

>-----Original Message-----
>From: Isaku Yamahata [mailto:yamahata@xxxxxxxxxxxxx]
>Sent: 2006年9月20日 17:40
>To: Xu, Anthony
>Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-ia64-devel][PATCH] workaround for itr_d
>
>
>
>> +    if(ps != 24)
>
>Hi Anthony.
>_PAGE_SIZE_16M should be used instead of a magic number, 24.
>
>
>On Wed, Sep 20, 2006 at 05:29:55PM +0800, Xu, Anthony wrote:
>> Workaround for itr_d
>>
>> This is a bad workaround
>> In linux, region 7 use 16M page size, and it is identity mapping,
>> While VHPT page size is 16K in XEN, if purge VHPT while guest insert 16M
>> TR,
>> It will iterate purge VHPT 1024 times, which makes XEN/IFF very slow.
>> XEN doesn't purge VHPT
>>
>> Signed-off-by: Anthony Xu < anthony.xu@xxxxxxxxx >
>>
>> Thanks,
>> Anthony
>>
>
>
>> _______________________________________________
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>> Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-ia64-devel
>
>--
>yamahata

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