---

yaml
---
r: 64419
b: refs/heads/master
c: 0b887d0
h: refs/heads/master
i:
  64417: 5036a2c
  64415: d31f1c7
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 136c4bbfe69336cd1d0b076cfc0ef6b92d576a19
+refs/heads/master: 0b887d037bf4b76eec1c960e5feecd6a5a806971

trunk/arch/i386/boot/boot.h

@@ -87,7 +87,7 @@ static inline void set_fs(u16 seg)
 static inline u16 fs(void)
 {
 	u16 seg;
-	asm("movw %%fs,%0" : "=rm" (seg));
+	asm volatile("movw %%fs,%0" : "=rm" (seg));
 	return seg;
 }
 
@@ -98,7 +98,7 @@ static inline void set_gs(u16 seg)
 static inline u16 gs(void)
 {
 	u16 seg;
-	asm("movw %%gs,%0" : "=rm" (seg));
+	asm volatile("movw %%gs,%0" : "=rm" (seg));
 	return seg;
 }
 
@@ -107,19 +107,19 @@ typedef unsigned int addr_t;
 static inline u8 rdfs8(addr_t addr)
 {
 	u8 v;
-	asm("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+	asm volatile("movb %%fs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
 	return v;
 }
 static inline u16 rdfs16(addr_t addr)
 {
 	u16 v;
-	asm("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+	asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
 	return v;
 }
 static inline u32 rdfs32(addr_t addr)
 {
 	u32 v;
-	asm("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+	asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
 	return v;
 }
 
@@ -139,19 +139,19 @@ static inline void wrfs32(u32 v, addr_t addr)
 static inline u8 rdgs8(addr_t addr)
 {
 	u8 v;
-	asm("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
+	asm volatile("movb %%gs:%1,%0" : "=r" (v) : "m" (*(u8 *)addr));
 	return v;
 }
 static inline u16 rdgs16(addr_t addr)
 {
 	u16 v;
-	asm("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
+	asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
 	return v;
 }
 static inline u32 rdgs32(addr_t addr)
 {
 	u32 v;
-	asm("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
+	asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
 	return v;
 }
 
@@ -180,15 +180,15 @@ static inline int memcmp(const void *s1, const void *s2, size_t len)
 static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
 {
 	u8 diff;
-	asm("fs; repe; cmpsb; setnz %0"
-	    : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+	asm volatile("fs; repe; cmpsb; setnz %0"
+		     : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
 	return diff;
 }
 static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
 {
 	u8 diff;
-	asm("gs; repe; cmpsb; setnz %0"
-	    : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+	asm volatile("gs; repe; cmpsb; setnz %0"
+		     : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
 	return diff;
 }
 

trunk/arch/i386/boot/cpucheck.c

@@ -96,7 +96,8 @@ static int has_fpu(void)
 		asm volatile("movl %0,%%cr0" : : "r" (cr0));
 	}
 
-	asm("fninit ; fnstsw %0 ; fnstcw %1" : "+m" (fsw), "+m" (fcw));
+	asm volatile("fninit ; fnstsw %0 ; fnstcw %1"
+		     : "+m" (fsw), "+m" (fcw));
 
 	return fsw == 0 && (fcw & 0x103f) == 0x003f;
 }

trunk/arch/i386/boot/edd.c

@@ -30,9 +30,9 @@ static int read_mbr(u8 devno, void *buf)
 	cx = 0x0001;		/* Sector 0-0-1 */
 	dx = devno;
 	bx = (size_t)buf;
-	asm("pushfl; stc; int $0x13; setc %%al; popfl"
-	    : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
-	    : : "esi", "edi", "memory");
+	asm volatile("pushfl; stc; int $0x13; setc %%al; popfl"
+		     : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
+		     : : "esi", "edi", "memory");
 
 	return -(u8)ax;		/* 0 or -1 */
 }

trunk/arch/i386/boot/tty.c

@@ -54,9 +54,9 @@ static u8 gettime(void)
 	u16 ax = 0x0200;
 	u16 cx, dx;
 
-	asm("int $0x1a"
-	    : "+a" (ax), "=c" (cx), "=d" (dx)
-	    : : "ebx", "esi", "edi");
+	asm volatile("int $0x1a"
+		     : "+a" (ax), "=c" (cx), "=d" (dx)
+		     : : "ebx", "esi", "edi");
 
 	return dx >> 8;
 }
@@ -67,17 +67,17 @@ static u8 gettime(void)
 int getchar(void)
 {
 	u16 ax = 0;
-	asm("int $0x16" : "+a" (ax));
+	asm volatile("int $0x16" : "+a" (ax));
 
 	return ax & 0xff;
 }
 
 static int kbd_pending(void)
 {
 	u8 pending;
-	asm("int $0x16; setnz %0"
-	    : "=rm" (pending)
-	    : "a" (0x0100));
+	asm volatile("int $0x16; setnz %0"
+		     : "=rm" (pending)
+		     : "a" (0x0100));
 	return pending;
 }
 

trunk/arch/i386/boot/video-vga.c

@@ -47,16 +47,16 @@ static u8 vga_set_basic_mode(void)
 
 #ifdef CONFIG_VIDEO_400_HACK
 	if (adapter >= ADAPTER_VGA) {
-		asm(INT10
-		    : : "a" (0x1202), "b" (0x0030)
-		    : "ecx", "edx", "esi", "edi");
+		asm volatile(INT10
+			     : : "a" (0x1202), "b" (0x0030)
+			     : "ecx", "edx", "esi", "edi");
 	}
 #endif
 
 	ax = 0x0f00;
-	asm(INT10
-	    : "+a" (ax)
-	    : : "ebx", "ecx", "edx", "esi", "edi");
+	asm volatile(INT10
+		     : "+a" (ax)
+		     : : "ebx", "ecx", "edx", "esi", "edi");
 
 	mode = (u8)ax;
 
@@ -73,9 +73,10 @@ static u8 vga_set_basic_mode(void)
 		mode = 3;
 
 	/* Set the mode */
+	ax = mode;
 	asm volatile(INT10
-		     : : "a" (mode)
-		     : "ebx", "ecx", "edx", "esi", "edi");
+		     : "+a" (ax)
+		     : : "ebx", "ecx", "edx", "esi", "edi");
 	do_restore = 1;
 	return mode;
 }

trunk/drivers/md/Kconfig

@@ -263,7 +263,7 @@ config DM_MULTIPATH_EMC
 
 config DM_MULTIPATH_RDAC
 	tristate "LSI/Engenio RDAC multipath support (EXPERIMENTAL)"
-	depends on DM_MULTIPATH && BLK_DEV_DM && EXPERIMENTAL
+	depends on DM_MULTIPATH && BLK_DEV_DM && SCSI && EXPERIMENTAL
 	---help---
 	  Multipath support for LSI/Engenio RDAC.
 

trunk/kernel/sched.c

@@ -2180,12 +2180,6 @@ int can_migrate_task(struct task_struct *p, struct rq *rq, int this_cpu,
 	if (task_running(rq, p))
 		return 0;
 
-	/*
-	 * Aggressive migration if too many balance attempts have failed:
-	 */
-	if (sd->nr_balance_failed > sd->cache_nice_tries)
-		return 1;
-
 	return 1;
 }
 
@@ -4923,7 +4917,7 @@ static inline void sched_init_granularity(void)
 	if (sysctl_sched_granularity > gran_limit)
 		sysctl_sched_granularity = gran_limit;
 
-	sysctl_sched_runtime_limit = sysctl_sched_granularity * 8;
+	sysctl_sched_runtime_limit = sysctl_sched_granularity * 5;
 	sysctl_sched_wakeup_granularity = sysctl_sched_granularity / 2;
 }
 

trunk/kernel/sched_fair.c

@@ -19,7 +19,7 @@
 
 /*
  * Preemption granularity:
- * (default: 2 msec, units: nanoseconds)
+ * (default: 10 msec, units: nanoseconds)
  *
  * NOTE: this granularity value is not the same as the concept of
  * 'timeslice length' - timeslices in CFS will typically be somewhat
@@ -31,18 +31,17 @@
  * number of CPUs. (i.e. factor 2x on 2-way systems, 3x on 4-way
  * systems, 4x on 8-way systems, 5x on 16-way systems, etc.)
  */
-unsigned int sysctl_sched_granularity __read_mostly = 2000000000ULL/HZ;
+unsigned int sysctl_sched_granularity __read_mostly = 10000000UL;
 
 /*
  * SCHED_BATCH wake-up granularity.
- * (default: 10 msec, units: nanoseconds)
+ * (default: 25 msec, units: nanoseconds)
  *
  * This option delays the preemption effects of decoupled workloads
  * and reduces their over-scheduling. Synchronous workloads will still
  * have immediate wakeup/sleep latencies.
  */
-unsigned int sysctl_sched_batch_wakeup_granularity __read_mostly =
-							10000000000ULL/HZ;
+unsigned int sysctl_sched_batch_wakeup_granularity __read_mostly = 25000000UL;
 
 /*
  * SCHED_OTHER wake-up granularity.
@@ -52,12 +51,12 @@ unsigned int sysctl_sched_batch_wakeup_granularity __read_mostly =
  * and reduces their over-scheduling. Synchronous workloads will still
  * have immediate wakeup/sleep latencies.
  */
-unsigned int sysctl_sched_wakeup_granularity __read_mostly = 1000000000ULL/HZ;
+unsigned int sysctl_sched_wakeup_granularity __read_mostly = 1000000UL;
 
 unsigned int sysctl_sched_stat_granularity __read_mostly;
 
 /*
- * Initialized in sched_init_granularity():
+ * Initialized in sched_init_granularity() [to 5 times the base granularity]:
  */
 unsigned int sysctl_sched_runtime_limit __read_mostly;
 
@@ -304,9 +303,9 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr)
 	delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw);
 
 	if (cfs_rq->sleeper_bonus > sysctl_sched_granularity) {
-		delta = min(cfs_rq->sleeper_bonus, (u64)delta_exec);
-		delta = calc_delta_mine(delta, curr->load.weight, lw);
-		delta = min((u64)delta, cfs_rq->sleeper_bonus);
+		delta = min((u64)delta_mine, cfs_rq->sleeper_bonus);
+		delta = min(delta, (unsigned long)(
+			(long)sysctl_sched_runtime_limit - curr->wait_runtime));
 		cfs_rq->sleeper_bonus -= delta;
 		delta_mine -= delta;
 	}
@@ -494,6 +493,13 @@ static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
 	unsigned long load = cfs_rq->load.weight, delta_fair;
 	long prev_runtime;
 
+	/*
+	 * Do not boost sleepers if there's too much bonus 'in flight'
+	 * already:
+	 */
+	if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit))
+		return;
+
 	if (sysctl_sched_features & SCHED_FEAT_SLEEPER_LOAD_AVG)
 		load = rq_of(cfs_rq)->cpu_load[2];
 
@@ -513,16 +519,13 @@ static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
 
 	prev_runtime = se->wait_runtime;
 	__add_wait_runtime(cfs_rq, se, delta_fair);
+	schedstat_add(cfs_rq, wait_runtime, se->wait_runtime);
 	delta_fair = se->wait_runtime - prev_runtime;
 
 	/*
 	 * Track the amount of bonus we've given to sleepers:
 	 */
 	cfs_rq->sleeper_bonus += delta_fair;
-	if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit))
-		cfs_rq->sleeper_bonus = sysctl_sched_runtime_limit;
-
-	schedstat_add(cfs_rq, wait_runtime, se->wait_runtime);
 }
 
 static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
@@ -1044,7 +1047,7 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
 	 * -granularity/2, so initialize the task with that:
 	 */
 	if (sysctl_sched_features & SCHED_FEAT_START_DEBIT)
-		p->se.wait_runtime = -(sysctl_sched_granularity / 2);
+		p->se.wait_runtime = -((long)sysctl_sched_granularity / 2);
 
 	__enqueue_entity(cfs_rq, se);
 }
@@ -1057,7 +1060,7 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
  */
 static void set_curr_task_fair(struct rq *rq)
 {
-	struct sched_entity *se = &rq->curr.se;
+	struct sched_entity *se = &rq->curr->se;
 
 	for_each_sched_entity(se)
 		set_next_entity(cfs_rq_of(se), se);

trunk/kernel/sched_rt.c

@@ -207,10 +207,15 @@ static void task_tick_rt(struct rq *rq, struct task_struct *p)
 		return;
 
 	p->time_slice = static_prio_timeslice(p->static_prio);
-	set_tsk_need_resched(p);
 
-	/* put it at the end of the queue: */
-	requeue_task_rt(rq, p);
+	/*
+	 * Requeue to the end of queue if we are not the only element
+	 * on the queue:
+	 */
+	if (p->run_list.prev != p->run_list.next) {
+		requeue_task_rt(rq, p);
+		set_tsk_need_resched(p);
+	}
 }
 
 static struct sched_class rt_sched_class __read_mostly = {