From: Sean Christopherson <seanjc@google.com>
To: Anish Moorthy <amoorthy@google.com>
Cc: oliver.upton@linux.dev, kvm@vger.kernel.org,
kvmarm@lists.linux.dev, pbonzini@redhat.com, maz@kernel.org,
robert.hoo.linux@gmail.com, jthoughton@google.com,
bgardon@google.com, dmatlack@google.com, ricarkol@google.com,
axelrasmussen@google.com, peterx@redhat.com,
nadav.amit@gmail.com, isaku.yamahata@gmail.com
Subject: Re: [PATCH v4 01/16] KVM: Allow hva_pfn_fast() to resolve read-only faults.
Date: Wed, 14 Jun 2023 07:39:50 -0700 [thread overview]
Message-ID: <ZInRNigDyzeuf79e@google.com> (raw)
In-Reply-To: <20230602161921.208564-2-amoorthy@google.com>
Don't put trailing punctation in shortlogs, i.e. drop the period.
On Fri, Jun 02, 2023, Anish Moorthy wrote:
> hva_to_pfn_fast() currently just fails for read-only faults, which is
> unnecessary. Instead, try pinning the page without passing FOLL_WRITE.
s/pinning/getting (or maybe grabbing?), because "pinning" is already way too
overloaded in the context of gup(), e.g. FOLL_PIN vs. FOLL_GET.
> This allows read-only faults to (potentially) be resolved without
"read-only faults" is somewhat confusing, because every architecture passes a
non-NULL @writable for read faults. If it weren't for KVM_ARM_MTE_COPY_TAGS,
this could be "faults to read-only memslots". Not sure how to concisely and
accurately describe this. :-/
next prev parent reply other threads:[~2023-06-14 14:39 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-02 16:19 [PATCH v4 00/16] Improve scalability of KVM + userfaultfd live migration via annotated memory faults Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 01/16] KVM: Allow hva_pfn_fast() to resolve read-only faults Anish Moorthy
2023-06-14 14:39 ` Sean Christopherson [this message]
2023-06-14 16:57 ` Anish Moorthy
2023-08-10 19:54 ` Anish Moorthy
2023-08-10 23:48 ` Sean Christopherson
2023-06-02 16:19 ` [PATCH v4 02/16] KVM: x86: Set vCPU exit reason to KVM_EXIT_UNKNOWN at the start of KVM_RUN Anish Moorthy
2023-06-02 20:30 ` Isaku Yamahata
2023-06-05 16:41 ` Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 03/16] KVM: Add KVM_CAP_MEMORY_FAULT_INFO Anish Moorthy
2023-06-03 16:58 ` Isaku Yamahata
2023-06-05 16:37 ` Anish Moorthy
2023-06-14 14:55 ` Sean Christopherson
2023-06-05 17:46 ` Anish Moorthy
2023-06-14 17:35 ` Sean Christopherson
2023-06-20 21:13 ` Anish Moorthy
2023-07-07 11:50 ` Kautuk Consul
2023-07-10 15:00 ` Anish Moorthy
2023-07-11 3:54 ` Kautuk Consul
2023-07-11 14:25 ` Sean Christopherson
2023-08-11 22:12 ` Anish Moorthy
2023-08-14 18:01 ` Sean Christopherson
2023-08-15 0:06 ` Anish Moorthy
2023-08-15 0:43 ` Sean Christopherson
2023-08-15 17:01 ` Anish Moorthy
2023-08-16 15:58 ` Sean Christopherson
2023-08-16 21:28 ` Anish Moorthy
2023-08-17 23:58 ` Sean Christopherson
2023-08-18 17:32 ` Anish Moorthy
2023-08-23 22:20 ` Sean Christopherson
2023-08-23 23:38 ` Anish Moorthy
2023-08-24 17:24 ` Sean Christopherson
2023-08-17 22:55 ` Anish Moorthy
2023-07-05 8:21 ` Kautuk Consul
2023-06-02 16:19 ` [PATCH v4 04/16] KVM: Add docstrings to __kvm_write_guest_page() and __kvm_read_guest_page() Anish Moorthy
2023-06-15 2:41 ` Robert Hoo
2023-08-14 22:51 ` Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 05/16] KVM: Annotate -EFAULTs from kvm_vcpu_write_guest_page() Anish Moorthy
2023-06-14 19:10 ` Sean Christopherson
2023-07-06 22:51 ` Anish Moorthy
2023-07-12 14:08 ` Sean Christopherson
2023-06-02 16:19 ` [PATCH v4 06/16] KVM: Annotate -EFAULTs from kvm_vcpu_read_guest_page() Anish Moorthy
2023-06-14 19:22 ` Sean Christopherson
2023-07-07 17:35 ` Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 07/16] KVM: Simplify error handling in __gfn_to_pfn_memslot() Anish Moorthy
2023-06-14 19:26 ` Sean Christopherson
2023-07-07 17:33 ` Anish Moorthy
2023-07-10 17:40 ` Sean Christopherson
2023-06-02 16:19 ` [PATCH v4 08/16] KVM: x86: Annotate -EFAULTs from kvm_handle_error_pfn() Anish Moorthy
2023-06-14 20:03 ` Sean Christopherson
2023-07-07 18:05 ` Anish Moorthy
2023-06-15 2:43 ` Robert Hoo
2023-06-15 14:40 ` Sean Christopherson
2023-06-02 16:19 ` [PATCH v4 09/16] KVM: Introduce KVM_CAP_NOWAIT_ON_FAULT without implementation Anish Moorthy
2023-06-14 20:11 ` Sean Christopherson
2023-07-06 19:04 ` Anish Moorthy
2023-06-14 21:20 ` Sean Christopherson
2023-06-14 21:23 ` Sean Christopherson
2023-08-23 21:17 ` Anish Moorthy
2023-06-15 3:55 ` Wang, Wei W
2023-06-15 14:56 ` Sean Christopherson
2023-06-16 12:08 ` Wang, Wei W
2023-07-07 18:13 ` Anish Moorthy
2023-07-07 20:07 ` Anish Moorthy
2023-07-11 15:29 ` Sean Christopherson
2023-08-25 0:15 ` Anish Moorthy
2023-08-29 22:41 ` Sean Christopherson
2023-08-30 16:21 ` Anish Moorthy
2023-09-07 21:17 ` Sean Christopherson
2023-06-02 16:19 ` [PATCH v4 10/16] KVM: x86: Implement KVM_CAP_NOWAIT_ON_FAULT Anish Moorthy
2023-06-14 20:25 ` Sean Christopherson
2023-07-07 17:41 ` Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 11/16] KVM: arm64: " Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 12/16] KVM: selftests: Report per-vcpu demand paging rate from demand paging test Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 13/16] KVM: selftests: Allow many vCPUs and reader threads per UFFD in " Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 14/16] KVM: selftests: Use EPOLL in userfaultfd_util reader threads and signal errors via TEST_ASSERT Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 15/16] KVM: selftests: Add memslot_flags parameter to memstress_create_vm() Anish Moorthy
2023-06-02 16:19 ` [PATCH v4 16/16] KVM: selftests: Handle memory fault exits in demand_paging_test Anish Moorthy
2023-06-20 2:44 ` Robert Hoo
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