---

yaml
---
r: 18190
b: refs/heads/master
c: 9f5974c
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ddae9c2ea79449beb00027cf77fca6dc489f2d15
+refs/heads/master: 9f5974c8734d83d4ab7096ed98136a82f41210d6

trunk/Documentation/filesystems/ext3.txt

@@ -84,8 +84,6 @@ reservation
 
 noreservation
 
-resize=
-
 bsddf 		(*)	Make 'df' act like BSD.
 minixdf			Make 'df' act like Minix.
 
@@ -175,6 +173,7 @@ See manual pages to learn more.
 tune2fs: 	create a ext3 journal on a ext2 partition with the -j flag.
 mke2fs: 	create a ext3 partition with the -j flag.
 debugfs: 	ext2 and ext3 file system debugger.
+ext2online:	online (mounted) ext2 and ext3 filesystem resizer
 
 
 References
@@ -184,6 +183,7 @@ kernel source:	<file:fs/ext3/>
 		<file:fs/jbd/>
 
 programs: 	http://e2fsprogs.sourceforge.net/
+		http://ext2resize.sourceforge.net
 
 useful links:	http://www.zip.com.au/~akpm/linux/ext3/ext3-usage.html
 		http://www-106.ibm.com/developerworks/linux/library/l-fs7/

trunk/Documentation/kdump/gdbmacros.txt

@@ -177,3 +177,25 @@ document trapinfo
 	'trapinfo <pid>' will tell you by which trap & possibly
 	addresthe kernel paniced.
 end
+
+
+define dmesg
+	set $i = 0
+	set $end_idx = (log_end - 1) & (log_buf_len - 1)
+
+	while ($i < logged_chars)
+		set $idx = (log_end - 1 - logged_chars + $i) & (log_buf_len - 1)
+
+		if ($idx + 100 <= $end_idx) || \
+		   ($end_idx <= $idx && $idx + 100 < log_buf_len)
+			printf "%.100s", &log_buf[$idx]
+			set $i = $i + 100
+		else
+			printf "%c", log_buf[$idx]
+			set $i = $i + 1
+		end
+	end
+end
+document dmesg
+	print the kernel ring buffer
+end

trunk/Documentation/kernel-parameters.txt

@@ -856,6 +856,49 @@ running once the system is up.
 
 	mga=		[HW,DRM]
 
+	migration_cost=
+			[KNL,SMP] debug: override scheduler migration costs
+			Format: <level-1-usecs>,<level-2-usecs>,...
+			This debugging option can be used to override the
+			default scheduler migration cost matrix. The numbers
+			are indexed by 'CPU domain distance'.
+			E.g. migration_cost=1000,2000,3000 on an SMT NUMA
+			box will set up an intra-core migration cost of
+			1 msec, an inter-core migration cost of 2 msecs,
+			and an inter-node migration cost of 3 msecs.
+
+			WARNING: using the wrong values here can break
+			scheduler performance, so it's only for scheduler
+			development purposes, not production environments.
+
+	migration_debug=
+			[KNL,SMP] migration cost auto-detect verbosity
+			Format=<0|1|2>
+			If a system's migration matrix reported at bootup
+			seems erroneous then this option can be used to
+			increase verbosity of the detection process.
+			We default to 0 (no extra messages), 1 will print
+			some more information, and 2 will be really
+			verbose (probably only useful if you also have a
+			serial console attached to the system).
+
+	migration_factor=
+			[KNL,SMP] multiply/divide migration costs by a factor
+			Format=<percent>
+			This debug option can be used to proportionally
+			increase or decrease the auto-detected migration
+			costs for all entries of the migration matrix.
+			E.g. migration_factor=150 will increase migration
+			costs by 50%. (and thus the scheduler will be less
+			eager migrating cache-hot tasks)
+			migration_factor=80 will decrease migration costs
+			by 20%. (thus the scheduler will be more eager to
+			migrate tasks)
+
+			WARNING: using the wrong values here can break
+			scheduler performance, so it's only for scheduler
+			development purposes, not production environments.
+
 	mousedev.tap_time=
 			[MOUSE] Maximum time between finger touching and
 			leaving touchpad surface for touch to be considered

trunk/Documentation/oops-tracing.txt

@@ -41,11 +41,9 @@ the disk is not available then you have three options :-
     run a null modem to a second machine and capture the output there
     using your favourite communication program.  Minicom works well.
 
-(3) Patch the kernel with one of the crash dump patches.  These save
-    data to a floppy disk or video rom or a swap partition.  None of
-    these are standard kernel patches so you have to find and apply
-    them yourself.  Search kernel archives for kmsgdump, lkcd and
-    oops+smram.
+(3) Use Kdump (see Documentation/kdump/kdump.txt),
+    extract the kernel ring buffer from old memory with using dmesg
+    gdbmacro in Documentation/kdump/gdbmacros.txt.
 
 
 Full Information

trunk/Documentation/video4linux/CARDLIST.bttv

@@ -142,3 +142,4 @@
 141 -> Asound Skyeye PCTV
 142 -> Sabrent TV-FM (bttv version)
 143 -> Hauppauge ImpactVCB (bt878)                         [0070:13eb]
+144 -> MagicTV

trunk/Documentation/video4linux/CARDLIST.cx88

@@ -19,7 +19,7 @@
  18 -> Hauppauge Nova-T DVB-T                              [0070:9002,0070:9001]
  19 -> Conexant DVB-T reference design                     [14f1:0187]
  20 -> Provideo PV259                                      [1540:2580]
- 21 -> DViCO FusionHDTV DVB-T Plus                         [18ac:db10]
+ 21 -> DViCO FusionHDTV DVB-T Plus                         [18ac:db10,18ac:db11]
  22 -> pcHDTV HD3000 HDTV                                  [7063:3000]
  23 -> digitalnow DNTV Live! DVB-T                         [17de:a8a6]
  24 -> Hauppauge WinTV 28xxx (Roslyn) models               [0070:2801]

trunk/Documentation/x86_64/boot-options.txt

@@ -125,7 +125,7 @@ SMP
   cpumask=MASK   only use cpus with bits set in mask
 
   additional_cpus=NUM Allow NUM more CPUs for hotplug
-		 (defaults are specified by the BIOS or half the available CPUs)
+		 (defaults are specified by the BIOS, see Documentation/x86_64/cpu-hotplug-spec)
 
 NUMA
 

trunk/Documentation/x86_64/cpu-hotplug-spec

@@ -0,0 +1,21 @@
+Firmware support for CPU hotplug under Linux/x86-64
+---------------------------------------------------
+
+Linux/x86-64 supports CPU hotplug now. For various reasons Linux wants to
+know in advance boot time the maximum number of CPUs that could be plugged
+into the system. ACPI 3.0 currently has no official way to supply
+this information from the firmware to the operating system.
+
+In ACPI each CPU needs an LAPIC object in the MADT table (5.2.11.5 in the
+ACPI 3.0 specification).  ACPI already has the concept of disabled LAPIC
+objects by setting the Enabled bit in the LAPIC object to zero.
+
+For CPU hotplug Linux/x86-64 expects now that any possible future hotpluggable
+CPU is already available in the MADT. If the CPU is not available yet
+it should have its LAPIC Enabled bit set to 0. Linux will use the number
+of disabled LAPICs to compute the maximum number of future CPUs.
+
+In the worst case the user can overwrite this choice using a command line
+option (additional_cpus=...), but it is recommended to supply the correct
+number (or a reasonable approximation of it, with erring towards more not less)
+in the MADT to avoid manual configuration.

trunk/MAINTAINERS

@@ -2359,13 +2359,6 @@ P:	Nicolas Pitre
 M:	nico@cam.org
 S:	Maintained
 
-SNA NETWORK LAYER
-P:	Jay Schulist
-M:	jschlst@samba.org
-L:	linux-sna@turbolinux.com
-W:	http://www.linux-sna.org
-S:	Supported
-
 SOFTWARE RAID (Multiple Disks) SUPPORT
 P:	Ingo Molnar
 M:	mingo@redhat.com

trunk/arch/alpha/kernel/pci-noop.c

@@ -7,6 +7,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/capability.h>
 #include <linux/mm.h>
 #include <linux/errno.h>
 #include <linux/sched.h>

trunk/arch/alpha/kernel/process.c

@@ -276,7 +276,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 {
 	extern void ret_from_fork(void);
 
-	struct thread_info *childti = p->thread_info;
+	struct thread_info *childti = task_thread_info(p);
 	struct pt_regs * childregs;
 	struct switch_stack * childstack, *stack;
 	unsigned long stack_offset, settls;
@@ -285,7 +285,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 	if (!(regs->ps & 8))
 		stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
 	childregs = (struct pt_regs *)
-	  (stack_offset + PAGE_SIZE + (long) childti);
+	  (stack_offset + PAGE_SIZE + task_stack_page(p));
 
 	*childregs = *regs;
 	settls = regs->r20;
@@ -428,30 +428,15 @@ dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt, struct thread_info *ti)
 int
 dump_elf_task(elf_greg_t *dest, struct task_struct *task)
 {
-	struct thread_info *ti;
-	struct pt_regs *pt;
-
-	ti = task->thread_info;
-	pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
-
-	dump_elf_thread(dest, pt, ti);
-
+	dump_elf_thread(dest, task_pt_regs(task), task_thread_info(task));
 	return 1;
 }
 
 int
 dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task)
 {
-	struct thread_info *ti;
-	struct pt_regs *pt;
-	struct switch_stack *sw;
-
-	ti = task->thread_info;
-	pt = (struct pt_regs *)((unsigned long)ti + 2*PAGE_SIZE) - 1;
-	sw = (struct switch_stack *)pt - 1;
-
+	struct switch_stack *sw = (struct switch_stack *)task_pt_regs(task) - 1;
 	memcpy(dest, sw->fp, 32 * 8);
-
 	return 1;
 }
 
@@ -492,8 +477,8 @@ do_sys_execve(char __user *ufilename, char __user * __user *argv,
 unsigned long
 thread_saved_pc(task_t *t)
 {
-	unsigned long base = (unsigned long)t->thread_info;
-	unsigned long fp, sp = t->thread_info->pcb.ksp;
+	unsigned long base = (unsigned long)task_stack_page(t);
+	unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
 
 	if (sp > base && sp+6*8 < base + 16*1024) {
 		fp = ((unsigned long*)sp)[6];
@@ -523,7 +508,7 @@ get_wchan(struct task_struct *p)
 
 	pc = thread_saved_pc(p);
 	if (in_sched_functions(pc)) {
-		schedule_frame = ((unsigned long *)p->thread_info->pcb.ksp)[6];
+		schedule_frame = ((unsigned long *)task_thread_info(p)->pcb.ksp)[6];
 		return ((unsigned long *)schedule_frame)[12];
 	}
 	return pc;

trunk/arch/alpha/kernel/ptrace.c

@@ -72,6 +72,13 @@ enum {
 	REG_R0 = 0, REG_F0 = 32, REG_FPCR = 63, REG_PC = 64
 };
 
+#define PT_REG(reg) \
+  (PAGE_SIZE*2 - sizeof(struct pt_regs) + offsetof(struct pt_regs, reg))
+
+#define SW_REG(reg) \
+ (PAGE_SIZE*2 - sizeof(struct pt_regs) - sizeof(struct switch_stack) \
+  + offsetof(struct switch_stack, reg))
+
 static int regoff[] = {
 	PT_REG(	   r0), PT_REG(	   r1), PT_REG(	   r2), PT_REG(	  r3),
 	PT_REG(	   r4), PT_REG(	   r5), PT_REG(	   r6), PT_REG(	  r7),
@@ -103,14 +110,14 @@ get_reg_addr(struct task_struct * task, unsigned long regno)
 	unsigned long *addr;
 
 	if (regno == 30) {
-		addr = &task->thread_info->pcb.usp;
+		addr = &task_thread_info(task)->pcb.usp;
 	} else if (regno == 65) {
-		addr = &task->thread_info->pcb.unique;
+		addr = &task_thread_info(task)->pcb.unique;
 	} else if (regno == 31 || regno > 65) {
 		zero = 0;
 		addr = &zero;
 	} else {
-		addr = (void *)task->thread_info + regoff[regno];
+		addr = task_stack_page(task) + regoff[regno];
 	}
 	return addr;
 }
@@ -125,7 +132,7 @@ get_reg(struct task_struct * task, unsigned long regno)
 	if (regno == 63) {
 		unsigned long fpcr = *get_reg_addr(task, regno);
 		unsigned long swcr
-		  = task->thread_info->ieee_state & IEEE_SW_MASK;
+		  = task_thread_info(task)->ieee_state & IEEE_SW_MASK;
 		swcr = swcr_update_status(swcr, fpcr);
 		return fpcr | swcr;
 	}
@@ -139,8 +146,8 @@ static int
 put_reg(struct task_struct *task, unsigned long regno, unsigned long data)
 {
 	if (regno == 63) {
-		task->thread_info->ieee_state
-		  = ((task->thread_info->ieee_state & ~IEEE_SW_MASK)
+		task_thread_info(task)->ieee_state
+		  = ((task_thread_info(task)->ieee_state & ~IEEE_SW_MASK)
 		     | (data & IEEE_SW_MASK));
 		data = (data & FPCR_DYN_MASK) | ieee_swcr_to_fpcr(data);
 	}
@@ -188,35 +195,35 @@ ptrace_set_bpt(struct task_struct * child)
 		 * branch (emulation can be tricky for fp branches).
 		 */
 		displ = ((s32)(insn << 11)) >> 9;
-		child->thread_info->bpt_addr[nsaved++] = pc + 4;
+		task_thread_info(child)->bpt_addr[nsaved++] = pc + 4;
 		if (displ)		/* guard against unoptimized code */
-			child->thread_info->bpt_addr[nsaved++]
+			task_thread_info(child)->bpt_addr[nsaved++]
 			  = pc + 4 + displ;
 		DBG(DBG_BPT, ("execing branch\n"));
 	} else if (op_code == 0x1a) {
 		reg_b = (insn >> 16) & 0x1f;
-		child->thread_info->bpt_addr[nsaved++] = get_reg(child, reg_b);
+		task_thread_info(child)->bpt_addr[nsaved++] = get_reg(child, reg_b);
 		DBG(DBG_BPT, ("execing jump\n"));
 	} else {
-		child->thread_info->bpt_addr[nsaved++] = pc + 4;
+		task_thread_info(child)->bpt_addr[nsaved++] = pc + 4;
 		DBG(DBG_BPT, ("execing normal insn\n"));
 	}
 
 	/* install breakpoints: */
 	for (i = 0; i < nsaved; ++i) {
-		res = read_int(child, child->thread_info->bpt_addr[i],
+		res = read_int(child, task_thread_info(child)->bpt_addr[i],
 			       (int *) &insn);
 		if (res < 0)
 			return res;
-		child->thread_info->bpt_insn[i] = insn;
+		task_thread_info(child)->bpt_insn[i] = insn;
 		DBG(DBG_BPT, ("    -> next_pc=%lx\n",
-			      child->thread_info->bpt_addr[i]));
-		res = write_int(child, child->thread_info->bpt_addr[i],
+			      task_thread_info(child)->bpt_addr[i]));
+		res = write_int(child, task_thread_info(child)->bpt_addr[i],
 				BREAKINST);
 		if (res < 0)
 			return res;
 	}
-	child->thread_info->bpt_nsaved = nsaved;
+	task_thread_info(child)->bpt_nsaved = nsaved;
 	return 0;
 }
 
@@ -227,18 +234,18 @@ ptrace_set_bpt(struct task_struct * child)
 int
 ptrace_cancel_bpt(struct task_struct * child)
 {
-	int i, nsaved = child->thread_info->bpt_nsaved;
+	int i, nsaved = task_thread_info(child)->bpt_nsaved;
 
-	child->thread_info->bpt_nsaved = 0;
+	task_thread_info(child)->bpt_nsaved = 0;
 
 	if (nsaved > 2) {
 		printk("ptrace_cancel_bpt: bogus nsaved: %d!\n", nsaved);
 		nsaved = 2;
 	}
 
 	for (i = 0; i < nsaved; ++i) {
-		write_int(child, child->thread_info->bpt_addr[i],
-			  child->thread_info->bpt_insn[i]);
+		write_int(child, task_thread_info(child)->bpt_addr[i],
+			  task_thread_info(child)->bpt_insn[i]);
 	}
 	return (nsaved != 0);
 }
@@ -355,7 +362,7 @@ do_sys_ptrace(long request, long pid, long addr, long data,
 		if (!valid_signal(data))
 			break;
 		/* Mark single stepping.  */
-		child->thread_info->bpt_nsaved = -1;
+		task_thread_info(child)->bpt_nsaved = -1;
 		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		child->exit_code = data;
 		wake_up_process(child);

trunk/arch/alpha/kernel/smp.c

@@ -302,7 +302,7 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
 		 + hwrpb->processor_offset
 		 + cpuid * hwrpb->processor_size);
 	hwpcb = (struct pcb_struct *) cpu->hwpcb;
-	ipcb = &idle->thread_info->pcb;
+	ipcb = &task_thread_info(idle)->pcb;
 
 	/* Initialize the CPU's HWPCB to something just good enough for
 	   us to get started.  Immediately after starting, we'll swpctx