Hi all! I am quite new to KVM, and I recently had to struggle with the kvm->srcu lock a little bit ... documentation for this lock seems to be quite sparse, I've only found some descriptions in mailing list archives (the description at the following URL is quite good: http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg90003.html ). So I wonder whether it would be helpful for others, too, if some information about this lock was added to the documentation file Documentation/virtual/kvm/locking.txt for example? I'd like to suggest the following text as a first draft (using some information from the URL above): 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. What do you think? Since I am not an expert in this area, extension and/or corrections are very welcome! Regards, Thomas -- 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
