Han, Weidong
2007-Oct-30 06:20 UTC
[Xen-devel] [VTD][PATCH] Do dpci eoi outside of irq_lock
Deadlock may occur if do hvm_dpci_eoi() inside of irq_lock on MP platform. For example, there are two physical cpus. If interrupt is injected on cpu0, but vcpu is migrated to cpu1 and it does eoi inside of irq_lock, then IPI will be issued to cpu0. At the same time, cpu0 may have disabled irq and is acquiring the same irq_lock. In addition, current code cannot guarantee do hvm_dpci_eoi() inside of irq_lock when timeout. This patch does hvm_dpci_eoi() outside of irq_lock, and solves above problems. Signed-off-by: Xiaohui Xin <xiaohui.xin@intel.com> Signed-off-by: Weidong Han <weidong.han@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel