search for: early_param

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:

...564D5868 @@ -62,10 +64,46 @@ static unsigned long vmware_get_tsc_khz(void) } #ifdef CONFIG_PARAVIRT +static struct cyc2ns_data vmware_cyc2ns __ro_after_init; + +static int vmw_sched_clock __initdata = 1; +static __init int setup_vmw_sched_clock(char *s) +{ + vmw_sched_clock = 0; + return 0; +} +early_param("no-vmw-sched-clock", setup_vmw_sched_clock); + +static unsigned long long vmware_sched_clock(void) +{ + unsigned long long ns; + + ns = mul_u64_u32_shr(rdtsc(), vmware_cyc2ns.cyc2ns_mul, + vmware_cyc2ns.cyc2ns_shift); + ns -= vmware_cyc2ns.cyc2ns_offset; + return ns; +} + static...

Hello, This patchset introduces steal time accounting support for the VMware guest. The idea and implementation of guest steal time support is similar to KVM ones and it is based on steal clock. The steal clock is a per CPU structure in a shared memory between hypervisor and guest, initialized by each CPU through hypercall. Steal clock is got updated by the hypervisor and read by the guest. The

This patchset includes several VMware guest improvements: Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 51 +++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+) -- 2.10.1

This patchset includes several VMware guest improvements: Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 51 +++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+) -- 2.10.1

...nit; > + > +static int vmw_sched_clock __initdata = 1; > +static __init int setup_vmw_sched_clock(char *s) Please stop glueing a variable to a function w/o a new line between them. It's just stopping the reading flow. > +{ > + vmw_sched_clock = 0; > + return 0; > +} > +early_param("no-vmw-sched-clock", setup_vmw_sched_clock); > + > +static unsigned long long vmware_sched_clock(void) > +{ > + unsigned long long ns; > + > + ns = mul_u64_u32_shr(rdtsc(), vmware_cyc2ns.cyc2ns_mul, > + vmware_cyc2ns.cyc2ns_shift); > + ns -= vmware_cyc2ns.c...

...be removed in a future kernel version */ static __init int xen_parse_nopvspin(char *arg) { - xen_pvspin = false; + pr_warn("xen_nopvspin is deprecated, replace it with \"pvlock_type=queued\"!\n"); + if (!pv_spinlock_type) + pv_spinlock_type = locktype_queued; return 0; } early_param("xen_nopvspin", xen_parse_nopvspin); - -- 1.8.3.1

...l S. Tsirkin <mst at redhat.com> --- mm/page_poison.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/page_poison.c b/mm/page_poison.c index e83fd44..762b472 100644 --- a/mm/page_poison.c +++ b/mm/page_poison.c @@ -17,6 +17,11 @@ static int early_page_poison_param(char *buf) } early_param("page_poison", early_page_poison_param); +/** + * page_poisoning_enabled - check if page poisoning is enabled + * + * Return true if page poisoning is enabled, or false if not. + */ bool page_poisoning_enabled(void) { /* @@ -29,6 +34,7 @@ bool page_poisoning_enabled(void) (!IS_EN...

...t (VMware) <rostedt at goodmis.org> --- diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index d9ab49bed8af..0eda91f8eeac 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock(char *s) } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns;

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns;

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns;

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns;

...564D5868 @@ -62,10 +67,46 @@ static unsigned long vmware_get_tsc_khz(void) } #ifdef CONFIG_PARAVIRT +static struct cyc2ns_data vmware_cyc2ns __ro_after_init; +static int vmw_sched_clock __initdata = 1; + +static __init int setup_vmw_sched_clock(char *s) +{ + vmw_sched_clock = 0; + return 0; +} +early_param("no-vmw-sched-clock", setup_vmw_sched_clock); + +static unsigned long long vmware_sched_clock(void) +{ + unsigned long long ns; + + ns = mul_u64_u32_shr(rdtsc(), vmware_cyc2ns.cyc2ns_mul, + vmware_cyc2ns.cyc2ns_shift); + ns -= vmware_cyc2ns.cyc2ns_offset; + return ns; +} + static...

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns; Patches currently in stable-queue which might be from rostedt at goodmis.org are queue-4.14/x86-...

...queue_spin_unlock); + pv_lock_ops.wait = xen_qlock_wait; + pv_lock_ops.kick = xen_qlock_kick; +#else pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(xen_lock_spinning); pv_lock_ops.unlock_kick = xen_unlock_kick; +#endif } /* @@ -310,7 +365,7 @@ static __init int xen_parse_nopvspin(char *arg) } early_param("xen_nopvspin", xen_parse_nopvspin); -#ifdef CONFIG_XEN_DEBUG_FS +#if defined(CONFIG_XEN_DEBUG_FS) && !defined(CONFIG_QUEUE_SPINLOCK) static struct dentry *d_spin_debug; diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index 537b13e..0b42933 100644 --- a/kernel/Kcon...

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns; Patches currently in stable-queue which might be from rostedt at goodmis.org are queue-4.18/trac...

...e Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -77,7 +77,7 @@ static __init int setup_vmw_sched_clock( } early_param("no-vmw-sched-clock", setup_vmw_sched_clock); -static unsigned long long vmware_sched_clock(void) +static unsigned long long notrace vmware_sched_clock(void) { unsigned long long ns; Patches currently in stable-queue which might be from rostedt at goodmis.org are queue-4.19/trac...

...pe = locktype_queued; + else if (!strcmp(s, "pv")) + pv_spinlock_type = locktype_paravirt; + else if (!strcmp(s, "unfair")) + pv_spinlock_type = locktype_unfair; + else + return -EINVAL; + + pr_info("PV lock type = %s (%d)\n", s, pv_spinlock_type); + return 0; +} + +early_param("pvlock_type", pvlock_setup); + DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key); void __init native_pv_lock_init(void) { - if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) + if (pv_spinlock_type == locktype_unfair) + return; + + if (!static_cpu_has(X86_FEATURE_HYPERVISOR) || + (pv_spinloc...

...pe = locktype_queued; + else if (!strcmp(s, "pv")) + pv_spinlock_type = locktype_paravirt; + else if (!strcmp(s, "unfair")) + pv_spinlock_type = locktype_unfair; + else + return -EINVAL; + + pr_info("PV lock type = %s (%d)\n", s, pv_spinlock_type); + return 0; +} + +early_param("pvlock_type", pvlock_setup); + DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key); void __init native_pv_lock_init(void) { - if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) + if (pv_spinlock_type == locktype_unfair) + return; + + if (!static_cpu_has(X86_FEATURE_HYPERVISOR) || + (pv_spinloc...