23 files changed, 92 insertions, 82 deletions

diff --git a/Makefile b/Makefile
index 4c8d79710b84..71e98e9e6acd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 28
-EXTRAVERSION = -rc9
+EXTRAVERSION =
 NAME = Erotic Pickled Herring
 
 # *DOCUMENTATION*
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index cfdf8c2c5c31..ea408dcba513 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -80,7 +80,6 @@
 #define X86_FEATURE_UP          (3*32+ 9) /* smp kernel running on up */
 #define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */
 #define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */
-#define X86_FEATURE_NOPL        (3*32+20) /* The NOPL (0F 1F) instructions */
 #define X86_FEATURE_PEBS        (3*32+12) /* Precise-Event Based Sampling */
 #define X86_FEATURE_BTS         (3*32+13) /* Branch Trace Store */
 #define X86_FEATURE_SYSCALL32   (3*32+14) /* "" syscall in ia32 userspace */
@@ -92,6 +91,8 @@
 #define X86_FEATURE_NOPL        (3*32+20) /* The NOPL (0F 1F) instructions */
 #define X86_FEATURE_AMDC1E      (3*32+21) /* AMD C1E detected */
 #define X86_FEATURE_XTOPOLOGY   (3*32+22) /* cpu topology enum extensions */
+#define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */
+#define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
 
 /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
 #define X86_FEATURE_XMM3        (4*32+ 0) /* "pni" SSE-3 */
@@ -117,6 +118,7 @@
 #define X86_FEATURE_XSAVE       (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
 #define X86_FEATURE_OSXSAVE     (4*32+27) /* "" XSAVE enabled in the OS */
 #define X86_FEATURE_AVX         (4*32+28) /* Advanced Vector Extensions */
+#define X86_FEATURE_HYPERVISOR  (4*32+31) /* Running on a hypervisor */
 
 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
 #define X86_FEATURE_XSTORE      (5*32+ 2) /* "rng" RNG present (xstore) */
@@ -237,6 +239,7 @@ extern const char * const x86_power_flags[32];
 #define cpu_has_xmm4_2          boot_cpu_has(X86_FEATURE_XMM4_2)
 #define cpu_has_x2apic          boot_cpu_has(X86_FEATURE_X2APIC)
 #define cpu_has_xsave           boot_cpu_has(X86_FEATURE_XSAVE)
+#define cpu_has_hypervisor      boot_cpu_has(X86_FEATURE_HYPERVISOR)
 
 #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
 # define cpu_has_invlpg         1
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index c2a812ebde89..b8a1799ea871 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -85,7 +85,8 @@ static inline void native_write_msr(unsigned int msr,
         asm volatile("wrmsr" : : "c" (msr), "a"(low), "d" (high) : "memory");
 }
 
-static inline int native_write_msr_safe(unsigned int msr,
+/* Can be uninlined because referenced by paravirt */
+notrace static inline int native_write_msr_safe(unsigned int msr,
                                         unsigned low, unsigned high)
 {
         int err;
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 82ec6075c057..4ae495a313f3 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -2,6 +2,11 @@
 # Makefile for x86-compatible CPU details and quirks
 #
 
+# Don't trace early stages of a secondary CPU boot
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_common.o = -pg
+endif
+
 obj-y                   := intel_cacheinfo.o addon_cpuid_features.o
 obj-y                   += proc.o capflags.o powerflags.o common.o
 
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index ef8f831af823..2cf23634b6d9 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -120,9 +120,17 @@ void __cpuinit detect_extended_topology(struct cpuinfo_x86 *c)
         c->cpu_core_id = phys_pkg_id(c->initial_apicid, ht_mask_width)
                                                  & core_select_mask;
         c->phys_proc_id = phys_pkg_id(c->initial_apicid, core_plus_mask_width);
+        /*
+         * Reinit the apicid, now that we have extended initial_apicid.
+         */
+        c->apicid = phys_pkg_id(c->initial_apicid, 0);
 #else
         c->cpu_core_id = phys_pkg_id(ht_mask_width) & core_select_mask;
         c->phys_proc_id = phys_pkg_id(core_plus_mask_width);
+        /*
+         * Reinit the apicid, now that we have extended initial_apicid.
+         */
+        c->apicid = phys_pkg_id(0);
 #endif
         c->x86_max_cores = (core_level_siblings / smp_num_siblings);
 
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 8f1e31db2ad5..7c878f6aa919 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -283,9 +283,14 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
         early_init_amd_mc(c);
 
-        /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
-        if (c->x86_power & (1<<8))
+        /*
+         * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
+         * with P/T states and does not stop in deep C-states
+         */
+        if (c->x86_power & (1 << 8)) {
                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+                set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+        }
 
 #ifdef CONFIG_X86_64
         set_cpu_cap(c, X86_FEATURE_SYSCALL32);
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index cd413d9a0218..8ea6929e974c 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -40,6 +40,16 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
         if (c->x86 == 15 && c->x86_cache_alignment == 64)
                 c->x86_cache_alignment = 128;
 #endif
+
+        /*
+         * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
+         * with P/T states and does not stop in deep C-states
+         */
+        if (c->x86_power & (1 << 8)) {
+                set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+                set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+        }
+
 }
 
 #ifdef CONFIG_X86_32
@@ -241,6 +251,13 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 
         intel_workarounds(c);
 
+        /*
+         * Detect the extended topology information if available. This
+         * will reinitialise the initial_apicid which will be used
+         * in init_intel_cacheinfo()
+         */
+        detect_extended_topology(c);
+
         l2 = init_intel_cacheinfo(c);
         if (c->cpuid_level > 9) {
                 unsigned eax = cpuid_eax(10);
@@ -308,7 +325,6 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
                 set_cpu_cap(c, X86_FEATURE_P3);
 #endif
 
-        detect_extended_topology(c);
         if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
                 /*
                  * let's use the legacy cpuid vector 0x1 and 0x4 for topology
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c27af49a4ede..cff9a50e389d 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -286,7 +286,7 @@ static void c1e_idle(void)
                 rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi);
                 if (lo & K8_INTP_C1E_ACTIVE_MASK) {
                         c1e_detected = 1;
-                        if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+                        if (!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
                                 mark_tsc_unstable("TSC halt in AMD C1E");
                         printk(KERN_INFO "System has AMD C1E enabled\n");
                         set_cpu_cap(&boot_cpu_data, X86_FEATURE_AMDC1E);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f71f96fc9e62..f6174d229024 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -287,7 +287,7 @@ static int __cpuinitdata unsafe_smp;
 /*
  * Activate a secondary processor.
  */
-static void __cpuinit start_secondary(void *unused)
+notrace static void __cpuinit start_secondary(void *unused)
 {
         /*
          * Don't put *anything* before cpu_init(), SMP booting is too
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 5f8d746a9b81..38aca048e951 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -374,15 +374,15 @@ static int tsc_halts_in_c(int state)
 {
         switch (boot_cpu_data.x86_vendor) {
         case X86_VENDOR_AMD:
+        case X86_VENDOR_INTEL:
                 /*
                  * AMD Fam10h TSC will tick in all
                  * C/P/S0/S1 states when this bit is set.
                  */
-                if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+                if (boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
                         return 0;
+
                 /*FALL THROUGH*/
-        case X86_VENDOR_INTEL:
-                /* Several cases known where TSC halts in C2 too */
         default:
                 return state > ACPI_STATE_C1;
         }
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 04b52e6ebc66..677432b9cb7e 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -303,7 +303,7 @@ extern void ftrace_dump(void);
 static inline void
 ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
 static inline int
-ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0)));
+ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
 
 static inline void tracing_start(void) { }
 static inline void tracing_stop(void) { }
diff --git a/include/trace/sched.h b/include/trace/sched.h
index bc4c9eadc6ba..0d81098ee9fc 100644
--- a/include/trace/sched.h
+++ b/include/trace/sched.h
@@ -17,8 +17,8 @@ DECLARE_TRACE(sched_wait_task,
                 TPARGS(rq, p));
 
 DECLARE_TRACE(sched_wakeup,
-        TPPROTO(struct rq *rq, struct task_struct *p),
-                TPARGS(rq, p));
+        TPPROTO(struct rq *rq, struct task_struct *p, int success),
+                TPARGS(rq, p, success));
 
 DECLARE_TRACE(sched_wakeup_new,
         TPPROTO(struct rq *rq, struct task_struct *p, int success),
diff --git a/kernel/sched.c b/kernel/sched.c
index ceda5799466e..dcb39bc88f6c 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2324,7 +2324,7 @@ out_activate:
         success = 1;
 
 out_running:
-        trace_sched_wakeup(rq, p);
+        trace_sched_wakeup(rq, p, success);
         check_preempt_curr(rq, p, sync);
 
         p->state = TASK_RUNNING;
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index bb6922a931b1..76f34c0ef29c 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -838,6 +838,7 @@ rb_set_commit_to_write(struct ring_buffer_per_cpu *cpu_buffer)
          * back to us). This allows us to do a simple loop to
          * assign the commit to the tail.
          */
+ again:
         while (cpu_buffer->commit_page != cpu_buffer->tail_page) {
                 cpu_buffer->commit_page->page->commit =
                         cpu_buffer->commit_page->write;
@@ -853,6 +854,17 @@ rb_set_commit_to_write(struct ring_buffer_per_cpu *cpu_buffer)
                         cpu_buffer->commit_page->write;
                 barrier();
         }
+
+        /* again, keep gcc from optimizing */
+        barrier();
+
+        /*
+         * If an interrupt came in just after the first while loop
+         * and pushed the tail page forward, we will be left with
+         * a dangling commit that will never go forward.
+         */
+        if (unlikely(cpu_buffer->commit_page != cpu_buffer->tail_page))
+                goto again;
 }
 
 static void rb_reset_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
@@ -950,12 +962,15 @@ static struct ring_buffer_event *
 __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
                   unsigned type, unsigned long length, u64 *ts)
 {
-        struct buffer_page *tail_page, *head_page, *reader_page;
+        struct buffer_page *tail_page, *head_page, *reader_page, *commit_page;
         unsigned long tail, write;
         struct ring_buffer *buffer = cpu_buffer->buffer;
         struct ring_buffer_event *event;
         unsigned long flags;
 
+        commit_page = cpu_buffer->commit_page;
+        /* we just need to protect against interrupts */
+        barrier();
         tail_page = cpu_buffer->tail_page;
         write = local_add_return(length, &tail_page->write);
         tail = write - length;
@@ -981,7 +996,7 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
                  * it all the way around the buffer, bail, and warn
                  * about it.
                  */
-                if (unlikely(next_page == cpu_buffer->commit_page)) {
+                if (unlikely(next_page == commit_page)) {
                         WARN_ON_ONCE(1);
                         goto out_unlock;
                 }
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0eb6d48347f7..79db26e8216e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -679,6 +679,16 @@ void tracing_reset(struct trace_array *tr, int cpu)
         ftrace_enable_cpu();
 }
 
+void tracing_reset_online_cpus(struct trace_array *tr)
+{
+        int cpu;
+
+        tr->time_start = ftrace_now(tr->cpu);
+
+        for_each_online_cpu(cpu)
+                tracing_reset(tr, cpu);
+}
+
 #define SAVED_CMDLINES 128
 static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
 static unsigned map_cmdline_to_pid[SAVED_CMDLINES];
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index fc75dce7a664..cc7a4f864036 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -374,6 +374,7 @@ struct trace_iterator {
 int tracing_is_enabled(void);
 void trace_wake_up(void);
 void tracing_reset(struct trace_array *tr, int cpu);
+void tracing_reset_online_cpus(struct trace_array *tr);
 int tracing_open_generic(struct inode *inode, struct file *filp);
 struct dentry *tracing_init_dentry(void);
 void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index a4fa2c57e34e..3ccebde28482 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -37,16 +37,6 @@ void disable_boot_trace(void)
                 tracing_stop_sched_switch_record();
 }
 
-static void reset_boot_trace(struct trace_array *tr)
-{
-        int cpu;
-
-        tr->time_start = ftrace_now(tr->cpu);
-
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
-}
-
 static int boot_trace_init(struct trace_array *tr)
 {
         int cpu;
@@ -130,7 +120,7 @@ struct tracer boot_tracer __read_mostly =
 {
         .name           = "initcall",
         .init           = boot_trace_init,
-        .reset          = reset_boot_trace,
+        .reset          = tracing_reset_online_cpus,
         .print_line     = initcall_print_line,
 };
 
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index e74f6d0a3216..9236d7e25a16 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -16,20 +16,10 @@
 
 #include "trace.h"
 
-static void function_reset(struct trace_array *tr)
-{
-        int cpu;
-
-        tr->time_start = ftrace_now(tr->cpu);
-
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
-}
-
 static void start_function_trace(struct trace_array *tr)
 {
         tr->cpu = get_cpu();
-        function_reset(tr);
+        tracing_reset_online_cpus(tr);
         put_cpu();
 
         tracing_start_cmdline_record();
@@ -55,7 +45,7 @@ static void function_trace_reset(struct trace_array *tr)
 
 static void function_trace_start(struct trace_array *tr)
 {
-        function_reset(tr);
+        tracing_reset_online_cpus(tr);
 }
 
 static struct tracer function_trace __read_mostly =
diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c
index ee29e012aa97..b6a3e20a49a9 100644
--- a/kernel/trace/trace_hw_branches.c
+++ b/kernel/trace/trace_hw_branches.c
@@ -25,16 +25,6 @@ static DEFINE_PER_CPU(unsigned char[SIZEOF_BTS], buffer);
 #define this_buffer per_cpu(buffer, smp_processor_id())
 
 
-static void bts_trace_reset(struct trace_array *tr)
-{
-        int cpu;
-
-        tr->time_start = ftrace_now(tr->cpu);
-
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
-}
-
 static void bts_trace_start_cpu(void *arg)
 {
         if (this_tracer)
@@ -54,7 +44,7 @@ static void bts_trace_start(struct trace_array *tr)
 {
         int cpu;
 
-        bts_trace_reset(tr);
+        tracing_reset_online_cpus(tr);
 
         for_each_cpu_mask(cpu, cpu_possible_map)
                 smp_call_function_single(cpu, bts_trace_start_cpu, NULL, 1);
@@ -78,7 +68,7 @@ static void bts_trace_stop(struct trace_array *tr)
 
 static int bts_trace_init(struct trace_array *tr)
 {
-        bts_trace_reset(tr);
+        tracing_reset_online_cpus(tr);
         bts_trace_start(tr);
 
         return 0;
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index 2fb6da6523b3..fffcb069f1dc 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -22,14 +22,10 @@ static unsigned long prev_overruns;
 
 static void mmio_reset_data(struct trace_array *tr)
 {
-        int cpu;
-
         overrun_detected = false;
         prev_overruns = 0;
-        tr->time_start = ftrace_now(tr->cpu);
 
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
+        tracing_reset_online_cpus(tr);
 }
 
 static int mmio_trace_init(struct trace_array *tr)
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 781d72ef873c..df175cb4564f 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -49,7 +49,7 @@ probe_sched_switch(struct rq *__rq, struct task_struct *prev,
 }
 
 static void
-probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
+probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success)
 {
         struct trace_array_cpu *data;
         unsigned long flags;
@@ -72,16 +72,6 @@ probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee)
         local_irq_restore(flags);
 }
 
-static void sched_switch_reset(struct trace_array *tr)
-{
-        int cpu;
-
-        tr->time_start = ftrace_now(tr->cpu);
-
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
-}
-
 static int tracing_sched_register(void)
 {
         int ret;
@@ -197,7 +187,7 @@ void tracing_sched_switch_assign_trace(struct trace_array *tr)
 
 static void start_sched_trace(struct trace_array *tr)
 {
-        sched_switch_reset(tr);
+        tracing_reset_online_cpus(tr);
         tracing_start_sched_switch_record();
 }
 
@@ -221,7 +211,7 @@ static void sched_switch_trace_reset(struct trace_array *tr)
 
 static void sched_switch_trace_start(struct trace_array *tr)
 {
-        sched_switch_reset(tr);
+        tracing_reset_online_cpus(tr);
         tracing_start_sched_switch();
 }
 
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0067b49746c1..43586b689e31 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -211,7 +211,7 @@ static void wakeup_reset(struct trace_array *tr)
 }
 
 static void
-probe_wakeup(struct rq *rq, struct task_struct *p)
+probe_wakeup(struct rq *rq, struct task_struct *p, int success)
 {
         int cpu = smp_processor_id();
         unsigned long flags;
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index 54960edb96d0..01becf1f19ff 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -234,20 +234,10 @@ static void stop_stack_timers(void)
                 stop_stack_timer(cpu);
 }
 
-static void stack_reset(struct trace_array *tr)
-{
-        int cpu;
-
-        tr->time_start = ftrace_now(tr->cpu);
-
-        for_each_online_cpu(cpu)
-                tracing_reset(tr, cpu);
-}
-
 static void start_stack_trace(struct trace_array *tr)
 {
         mutex_lock(&sample_timer_lock);
-        stack_reset(tr);
+        tracing_reset_online_cpus(tr);
         start_stack_timers();
         tracer_enabled = 1;
         mutex_unlock(&sample_timer_lock);