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authorPaolo Bonzini <[email protected]>2023-01-09 11:02:16 +0000
committerPaolo Bonzini <[email protected]>2023-01-11 18:31:33 +0000
commit3a9ae31ac26a58d33008c42f6cd022afc2af2dc0 (patch)
tree82860bd99ec8342e5f8fd67ac4d51ca7117d1fb3 /tools/perf/scripts/python/flamegraph.py
parentKVM: x86: Do not return host topology information from KVM_GET_SUPPORTED_CPUID (diff)
downloadkernel-3a9ae31ac26a58d33008c42f6cd022afc2af2dc0.tar.gz
kernel-3a9ae31ac26a58d33008c42f6cd022afc2af2dc0.zip
Documentation: kvm: fix SRCU locking order docs
kvm->srcu is taken in KVM_RUN and several other vCPU ioctls, therefore vcpu->mutex is susceptible to the same deadlock that is documented for kvm->slots_lock. The same holds for kvm->lock, since kvm->lock is held outside vcpu->mutex. Fix the documentation and rearrange it to highlight the difference between these locks and kvm->slots_arch_lock, and how kvm->slots_arch_lock can be useful while processing a vmexit. Signed-off-by: Paolo Bonzini <[email protected]>
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