Messages in this thread | | | Subject | Re: [PATCH v2] Call xen_cleanhighmap() with 4MB aligned for page tables mapping | From | Juergen Gross <> | Date | Wed, 27 Sep 2017 16:33:04 +0200 |
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On 27/09/17 15:38, Boris Ostrovsky wrote: > On 09/27/2017 05:43 AM, Juergen Gross wrote: >> On 27/09/17 11:41, Zhenzhong Duan wrote: >>> When bootup a PVM guest with large memory(Ex.240GB), XEN provided initial >>> mapping overlaps with kernel module virtual space. When mapping in this space >>> is cleared by xen_cleanhighmap(), in certain case there could be an 2MB mapping >>> left. This is due to XEN initialize 4MB aligned mapping but xen_cleanhighmap() >>> finish at 2MB boundary. > > Does this mapping need to be 4MB-aligned?
I guess you are questioning the alignment of addr to be 4MB? In this case you are right: the end of the mapping is 4MB aligned, as correctly stated in the comment added.
> (I also think this should go to stable trees)
Indeed.
Juergen
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