Re: [PATCH] KVM: Add documentation for kvm-srcu lock
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@vger.kernel.org/msg90040.html ) Signed-off-by: Thomas Huth th...@linux.vnet.ibm.com Reviewed-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com --- 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] KVM: Add documentation for kvm-srcu lock
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@vger.kernel.org/msg90040.html ) Signed-off-by: Thomas Huth th...@linux.vnet.ibm.com Reviewed-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com --- 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. -- 1.8.1.4 -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
