On 2020-10-26 23:41, Gavin Shan wrote:
Hi Will,
On 10/27/20 1:44 AM, Will Deacon wrote:
For consistency with the rest of the stage-2 page-table page
allocations
(performing using a kvm_mmu_memory_cache), ensure that __GFP_ACCOUNT
is
included in the GFP flags for the PGD pages.
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Quentin Perret <qperret@xxxxxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
---
arch/arm64/kvm/hyp/pgtable.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
The patch itself looks good to me:
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
Another question is why the page-table pages for hyp mode aren't
allocated with __GFP_ACCOUNT in kvm_pgtable_hyp_init and
hyp_map_walker()?
Why user task would you account the hypervisor mappings to? The page
tables
used for HYP code and data are definitely not attributable to any task.
The kvm and kvm_vcpu mappings *could* be attributed to a user task, but
the page tables are likely shared with other tasks. So who gets the
blame?
M.
--
Jazz is not dead. It just smells funny...
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