On 09/25/2017 09:59 AM, Juergen Gross wrote: > Ping? > > On 06/09/17 19:36, Juergen Gross wrote: >> With virt_spin_lock() being guarded by a static key the bare metal case >> can be optimized by patching the call away completely. In case a kernel >> running as a guest it can decide whether to use paravitualized >> spinlocks, the current fallback to the unfair test-and-set scheme, or >> to mimic the bare metal behavior. >> >> V3: >> - remove test for hypervisor environment from virt_spin_lock(9 as >> suggested by Waiman Long >> >> V2: >> - use static key instead of making virt_spin_lock() a pvops function >> >> Juergen Gross (2): >> paravirt/locks: use new static key for controlling call of >> virt_spin_lock() >> paravirt,xen: correct xen_nopvspin case >> >> arch/x86/include/asm/qspinlock.h | 11 ++++++++++- >> arch/x86/kernel/paravirt-spinlocks.c | 6 ++++++ >> arch/x86/kernel/smpboot.c | 2 ++ >> arch/x86/xen/spinlock.c | 2 ++ >> kernel/locking/qspinlock.c | 4 ++++ >> 5 files changed, 24 insertions(+), 1 deletion(-) >> Acked-by: Waiman Long <longman@xxxxxxxxxx> _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
