Re: [PATCH v5.5 05/30] KVM: Resync only arch fields when slots_arch_lock gets reacquired
"Maciej S. Szmigiero" <[email protected]>
| Newsgroups | org.kernel.vger.kvm-ppc,dev.linux.lists.kvmarm,org.infradead.lists.kvm-riscv,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-riscv,org.kernel.vger.kvm,org.kernel.vger.linux-kernel,org.kernel.vger.linux-mips |
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On 04.11.2021 01:25, Sean Christopherson wrote: > From: Maciej S. Szmigiero <[email protected]> > > There is no need to copy the whole memslot data after releasing > slots_arch_lock for a moment to install temporary memslots copy in > kvm_set_memslot() since this lock only protects the arch field of each > memslot. > > Just resync this particular field after reacquiring slots_arch_lock. > > Note, this also eliminates the need to manually clear the INVALID flag > when restoring memslots; the "setting" of the INVALID flag was an > unwanted side effect of copying the entire memslots. > > Signed-off-by: Maciej S. Szmigiero <[email protected]> > [sean: tweak shortlog, note INVALID flag in changelog, revert comment] This updated patch also open-codes kvm_copy_memslots(), which my previous version didn't. I think it's worth mentioning this in the change log, too. Thanks, Maciej