Re: [PATCH v9 07/13] KVM: guest_memfd: Add flag to remove from direct map
From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
Date: 2026-01-16 18:10:11
Also in:
bpf, kvm, kvmarm, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, linux-s390, lkml, loongarch
On Fri, 2026-01-16 at 17:51 +0000, Nikita Kalyazin wrote:
Yes, this is a problem that we'd like to address. We have been discussing it in [1]. The effect of flushing on memory population that we see on x86 is 5-7x elongation. We are thinking of making use of the no-direct-map memory allocator that Brendan is working on [2].
Ah, makes sense. Do you plan to merge this before the performance problems are addressed? I guess this series focuses on safety and functionality first.