Re: [Xen-devel] [PATCH v2 for-4.9] x86/mm: Fix incorrect unmapping of 2MB and 1GB pages

[Julien Grall <julien.grall@xxxxxxx>]

Hello,

Sorry I missed that patch. In the future, please CC me if you want a 
patch to go in Xen 4.9.
On 10/05/17 12:13, Igor Druzhinin wrote:
> The same set of functions is used to set as well as to clean
> P2M entries, except that for clean operations INVALID_MFN (~0UL)
> is passed as a parameter. Unfortunately, when calculating an
> appropriate target order for a particular mapping INVALID_MFN
> is not taken into account which leads to 4K page target order
> being set each time even for 2MB and 1GB mappings. This eventually
> breaks down an EPT structure irreversibly into 4K mappings which
> prevents consecutive high order mappings to this area.
It sounds like we have a similar issue on ARM as I wrote the 
implementation based on the x86 code. I will send a patch.
> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
Release-acked-by: Julien Grall <julien.grall@xxxxxxx>

Cheers,

--
Julien Grall

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel