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author | David S. Miller <davem@davemloft.net> | 2016-11-15 10:54:36 -0500 |
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committer | David S. Miller <davem@davemloft.net> | 2016-11-15 10:54:36 -0500 |
commit | bb598c1b8c9bf56981927dcb8c0dc34b8ff95342 (patch) | |
tree | 69fe6d3bcdbf0acb76e42b144d8af5a0234ccdcb /Documentation/virtual/kvm/locking.txt | |
parent | mdio: Demote print from info to debug in mdio_driver_register (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
download | linux-dev-bb598c1b8c9bf56981927dcb8c0dc34b8ff95342.tar.xz linux-dev-bb598c1b8c9bf56981927dcb8c0dc34b8ff95342.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Several cases of bug fixes in 'net' overlapping other changes in
'net-next-.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/virtual/kvm/locking.txt')
-rw-r--r-- | Documentation/virtual/kvm/locking.txt | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/virtual/kvm/locking.txt b/Documentation/virtual/kvm/locking.txt index f2491a8c68b4..e5dd9f4d6100 100644 --- a/Documentation/virtual/kvm/locking.txt +++ b/Documentation/virtual/kvm/locking.txt @@ -4,7 +4,17 @@ KVM Lock Overview 1. Acquisition Orders --------------------- -(to be written) +The acquisition orders for mutexes are as follows: + +- kvm->lock is taken outside vcpu->mutex + +- kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock + +- kvm->slots_lock is taken outside kvm->irq_lock, though acquiring + them together is quite rare. + +For spinlocks, kvm_lock is taken outside kvm->mmu_lock. Everything +else is a leaf: no other lock is taken inside the critical sections. 2: Exception ------------ |