On 2/12/19 15:31, Jan Beulich wrote:
On 08.02.19 at 14:44, wrote:
>> @@ -33,10 +34,11 @@ unsigned long __read_mostly
>> pdx_group_valid[BITS_TO_LONGS(
>>
>> bool __mfn_valid(unsigned long mfn)
>> {
>> -return likely(mfn < max_page) &&
>> - likely(!(mfn & pfn_hole_mask)) &&
>>> On 08.02.19 at 14:44, wrote:
> @@ -33,10 +34,11 @@ unsigned long __read_mostly pdx_group_valid[BITS_TO_LONGS(
>
> bool __mfn_valid(unsigned long mfn)
> {
> -return likely(mfn < max_page) &&
> - likely(!(mfn & pfn_hole_mask)) &&
> - likely(test_bit(pfn_to_pdx(mfn) /
The get_page_from_gfn method returns a pointer to a page that belongs
to a gfn. Before returning the pointer, the gfn is checked for being
valid. Under speculation, these checks can be bypassed, so that
the function get_page is still executed partially. Consequently, the
function page_get_owner_and
