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| author | Rob Landley <rlandley@parallels.com> | 2011-05-06 20:22:02 +0400 |
|---|---|---|
| committer | Randy Dunlap <randy.dunlap@oracle.com> | 2011-05-06 20:22:02 +0400 |
| commit | ed16648eb5b86917f0b90bdcdbc857202da72f90 (patch) | |
| tree | a8198415a6c2f1909f02340b05d36e1d53b82320 /Documentation/virtual/kvm/locking.txt | |
| parent | bfd412db9e7b0d8f7b9c09d12d07aa2ac785f1d0 (diff) | |
| download | linux-ed16648eb5b86917f0b90bdcdbc857202da72f90.tar.xz | |
Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:
cd Documentation
mkdir virtual
git mv kvm uml lguest virtual
Signed-off-by: Rob Landley <rlandley@parallels.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Diffstat (limited to 'Documentation/virtual/kvm/locking.txt')
| -rw-r--r-- | Documentation/virtual/kvm/locking.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/locking.txt b/Documentation/virtual/kvm/locking.txt new file mode 100644 index 000000000000..3b4cd3bf5631 --- /dev/null +++ b/Documentation/virtual/kvm/locking.txt @@ -0,0 +1,25 @@ +KVM Lock Overview +================= + +1. Acquisition Orders +--------------------- + +(to be written) + +2. Reference +------------ + +Name: kvm_lock +Type: raw_spinlock +Arch: any +Protects: - vm_list + - hardware virtualization enable/disable +Comment: 'raw' because hardware enabling/disabling must be atomic /wrt + migration. + +Name: kvm_arch::tsc_write_lock +Type: raw_spinlock +Arch: x86 +Protects: - kvm_arch::{last_tsc_write,last_tsc_nsec,last_tsc_offset} + - tsc offset in vmcb +Comment: 'raw' because updating the tsc offsets must not be preempted. |