Il 09/09/2013 17:32, Thomas Huth ha scritto: > This patch documents the kvm->srcu lock (using the information from > a mail which has been posted by Marcelo Tosatti to the kvm mailing > list some months ago, see the following URL for details: > http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg90040.html ) > > Signed-off-by: Thomas Huth <thuth@xxxxxxxxxxxxxxxxxx> > Reviewed-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> > --- > Documentation/virtual/kvm/locking.txt | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/Documentation/virtual/kvm/locking.txt b/Documentation/virtual/kvm/locking.txt > index 41b7ac9..a9f366e 100644 > --- a/Documentation/virtual/kvm/locking.txt > +++ b/Documentation/virtual/kvm/locking.txt > @@ -151,3 +151,14 @@ Type: spinlock_t > Arch: any > Protects: -shadow page/shadow tlb entry > Comment: it is a spinlock since it is used in mmu notifier. > + > +Name: kvm->srcu > +Type: srcu lock > +Arch: any > +Protects: - kvm->memslots > + - kvm->buses > +Comment: The srcu read lock must be held while accessing memslots (e.g. > + when using gfn_to_* functions) and while accessing in-kernel > + MMIO/PIO address->device structure mapping (kvm->buses). > + The srcu index can be stored in kvm_vcpu->srcu_idx per vcpu > + if it is needed by multiple functions. > Applied to kvm/queue for 3.12, thanks. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
