search for: xen_init_lock_cpu

v1->v2: - Make pv_spinlock_type a bit mask for easier checking. - Add patch 2 to deprecate xen_nopvspin v1 - https://lkml.org/lkml/2017/11/1/381 Patch 1 adds a new pvlock_type parameter for the administrators to specify the type of lock to be used in a para-virtualized kernel. Patch 2 deprecates Xen's xen_nopvspin parameter as it is no longer needed. Waiman Long (2): x86/paravirt:

v1->v2: - Make pv_spinlock_type a bit mask for easier checking. - Add patch 2 to deprecate xen_nopvspin v1 - https://lkml.org/lkml/2017/11/1/381 Patch 1 adds a new pvlock_type parameter for the administrators to specify the type of lock to be used in a para-virtualized kernel. Patch 2 deprecates Xen's xen_nopvspin parameter as it is no longer needed. Waiman Long (2): x86/paravirt:

....c index d5f79ac..19e2e75 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -20,7 +20,6 @@ static DEFINE_PER_CPU(int, lock_kicker_irq) = -1; static DEFINE_PER_CPU(char *, irq_name); -static bool xen_pvspin = true; #include <asm/qspinlock.h> @@ -81,12 +80,8 @@ void xen_init_lock_cpu(int cpu) int irq; char *name; - if (!xen_pvspin || - (pv_spinlock_type & (locktype_queued|locktype_unfair))) { - if ((cpu == 0) && !pv_spinlock_type) - static_branch_disable(&virt_spin_lock_key); + if (pv_spinlock_type & (locktype_queued|locktype_unfair)) return;...

After much joy with this, I thought I post this to a bigger audience. After having migrated to Xen 4.1.1, booting HVM guests had several issues. Some related to interrupts not being set up correctly (which Stefano has posted patches) and even with those 3.0 guests seem to hang for me while 2.6.38 or older kernels were ok. After digging deeply into this, I think I found the issue. However, if that

Hi Konrad, I just tried to boot a 3.8.0-rc0 kernel (last commit: 7313264b899bbf3988841296265a6e0e8a7b6521) as dom0 on my machine with current xen-unstable. The boot stalls: [ 0.000000] ACPI: PM-Timer IO Port: 0x808 [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01]

..._SYMBOL (pv_mmu_ops); EXPORT_SYMBOL_GPL(pv_info); EXPORT_SYMBOL (pv_irq_ops); +EXPORT_SYMBOL (pv_spinlock_type); diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index 1e1462d..9fc8eab 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -82,7 +82,7 @@ void xen_init_lock_cpu(int cpu) char *name; if (!xen_pvspin) { - if (cpu == 0) + if ((cpu == 0) && (pv_spinlock_type == locktype_auto)) static_branch_disable(&virt_spin_lock_key); return; } @@ -130,8 +130,8 @@ void xen_uninit_lock_cpu(int cpu) */ void __init xen_init_spinlocks(void) { - -...

..._SYMBOL (pv_mmu_ops); EXPORT_SYMBOL_GPL(pv_info); EXPORT_SYMBOL (pv_irq_ops); +EXPORT_SYMBOL (pv_spinlock_type); diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index 1e1462d..9fc8eab 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -82,7 +82,7 @@ void xen_init_lock_cpu(int cpu) char *name; if (!xen_pvspin) { - if (cpu == 0) + if ((cpu == 0) && (pv_spinlock_type == locktype_auto)) static_branch_disable(&virt_spin_lock_key); return; } @@ -130,8 +130,8 @@ void xen_uninit_lock_cpu(int cpu) */ void __init xen_init_spinlocks(void) { - -...