Re: [PATCH kernel] KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST

On Wed, 1 Sep 2021 18:45:50 +1000, Alexey Kardashevskiy wrote:

H_COPY_TOFROM_GUEST is an hcall for an upper level VM to access its nested
VMs memory. The userspace can trigger WARN_ON_ONCE(!(gfp & __GFP_NOWARN))
in __alloc_pages() by constructing a tiny VM which only does
H_COPY_TOFROM_GUEST with a too big GPR9 (number of bytes to copy).

This silences the warning by adding __GFP_NOWARN.

[...]

Applied to powerpc/next.

[1/1] KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST
      https://git.kernel.org/powerpc/c/792020907b11c6f9246c21977cab3bad985ae4b6

cheers