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| author |   Sean Christopherson <seanjc@google.com> | 2021-10-21 17:49:27 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-10-22 11:20:16 -0400 |
| commit | 187c8833def8a191c7f01d7932eac1bd2ab84af1 (patch) | |
| tree | 5a76d19edb25bbc663c4eafec41c37875625bc68 /tools/perf/util/include/linux/git:/ssh:/git@git.zx2c4.com | |
| parent | KVM: x86: Move SVM's APICv sanity check to common x86 (diff) | |
| download | linux-dev-187c8833def8a191c7f01d7932eac1bd2ab84af1.tar.xz linux-dev-187c8833def8a191c7f01d7932eac1bd2ab84af1.zip | |
KVM: x86: Use rw_semaphore for APICv lock to allow vCPU parallelism
Use a rw_semaphore instead of a mutex to coordinate APICv updates so that
vCPUs responding to requests can take the lock for read and run in
parallel. Using a mutex forces serialization of vCPUs even though
kvm_vcpu_update_apicv() only touches data local to that vCPU or is
protected by a different lock, e.g. SVM's ir_list_lock.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211022004927.1448382-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/util/include/linux/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions