---

yaml --- r: 18043 b: refs/heads/master c: 593195f h: refs/heads/master i: 18041: c5a8cf2 18039: 55babd5 v: v3
git-mirror · Jan 12, 2006 · 9827ee3 · 9827ee3
1 parent c08428e
commit 9827ee3
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diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f9cfc08d640e1586e76eee63cc2b0a9360bc7c7e
+refs/heads/master: 593195f9b2309693f27b402f34573f7920b82c3e
diff --git a/trunk/Documentation/filesystems/ext3.txt b/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/

diff --git a/trunk/Documentation/kdump/gdbmacros.txt b/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
diff --git a/trunk/Documentation/oops-tracing.txt b/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

diff --git a/trunk/Documentation/x86_64/boot-options.txt b/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
 

diff --git a/trunk/Documentation/x86_64/cpu-hotplug-spec b/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.
diff --git a/trunk/MAINTAINERS b/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

diff --git a/trunk/arch/alpha/kernel/pci-noop.c b/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>

diff --git a/trunk/arch/arm/common/rtctime.c b/trunk/arch/arm/common/rtctime.c
@@ -17,6 +17,7 @@
 #include <linux/proc_fs.h>
 #include <linux/miscdevice.h>
 #include <linux/spinlock.h>
+#include <linux/capability.h>
 #include <linux/device.h>
 
 #include <asm/rtc.h>

diff --git a/trunk/arch/arm/kernel/apm.c b/trunk/arch/arm/kernel/apm.c
@@ -18,6 +18,7 @@
 #include <linux/proc_fs.h>
 #include <linux/miscdevice.h>
 #include <linux/apm_bios.h>
+#include <linux/capability.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
 #include <linux/device.h>

diff --git a/trunk/arch/cris/arch-v10/drivers/ds1302.c b/trunk/arch/cris/arch-v10/drivers/ds1302.c
@@ -148,6 +148,7 @@
 #include <linux/miscdevice.h>
 #include <linux/delay.h>
 #include <linux/bcd.h>
+#include <linux/capability.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>

diff --git a/trunk/arch/cris/arch-v10/drivers/pcf8563.c b/trunk/arch/cris/arch-v10/drivers/pcf8563.c
@@ -28,6 +28,7 @@
 #include <linux/ioctl.h>
 #include <linux/delay.h>
 #include <linux/bcd.h>
+#include <linux/capability.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>

diff --git a/trunk/arch/i386/Kconfig b/trunk/arch/i386/Kconfig
@@ -41,8 +41,21 @@ config ARCH_MAY_HAVE_PC_FDC
 	bool
 	default y
 
+config DMI
+	bool
+	default y
+
 source "init/Kconfig"
 
+config DOUBLEFAULT
+	default y
+	bool "Enable doublefault exception handler" if EMBEDDED
+	help
+          This option allows trapping of rare doublefault exceptions that
+          would otherwise cause a system to silently reboot. Disabling this
+          option saves about 4k and might cause you much additional grey
+          hair.
+
 menu "Processor type and features"
 
 choice

diff --git a/trunk/arch/i386/kernel/acpi/boot.c b/trunk/arch/i386/kernel/acpi/boot.c
@@ -108,7 +108,7 @@ char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
 	if (!phys_addr || !size)
 		return NULL;
 
-	if (phys_addr < (end_pfn_map << PAGE_SHIFT))
+	if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
 		return __va(phys_addr);
 
 	return NULL;

diff --git a/trunk/arch/i386/kernel/apic.c b/trunk/arch/i386/kernel/apic.c
@@ -26,6 +26,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/sysdev.h>
 #include <linux/cpu.h>
+#include <linux/module.h>
 
 #include <asm/atomic.h>
 #include <asm/smp.h>
@@ -37,9 +38,16 @@
 #include <asm/i8253.h>
 
 #include <mach_apic.h>
+#include <mach_ipi.h>
 
 #include "io_ports.h"
 
+/*
+ * cpu_mask that denotes the CPUs that needs timer interrupt coming in as
+ * IPIs in place of local APIC timers
+ */
+static cpumask_t timer_bcast_ipi;
+
 /*
  * Knob to control our willingness to enable the local APIC.
  */
@@ -92,10 +100,6 @@ void __init apic_intr_init(void)
 /* Using APIC to generate smp_local_timer_interrupt? */
 int using_apic_timer = 0;
 
-static DEFINE_PER_CPU(int, prof_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_old_multiplier) = 1;
-static DEFINE_PER_CPU(int, prof_counter) = 1;
-
 static int enabled_via_apicbase;
 
 void enable_NMI_through_LVT0 (void * dummy)
@@ -935,11 +939,16 @@ void (*wait_timer_tick)(void) __devinitdata = wait_8254_wraparound;
 static void __setup_APIC_LVTT(unsigned int clocks)
 {
 	unsigned int lvtt_value, tmp_value, ver;
+	int cpu = smp_processor_id();
 
 	ver = GET_APIC_VERSION(apic_read(APIC_LVR));
 	lvtt_value = APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR;
 	if (!APIC_INTEGRATED(ver))
 		lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV);
+
+	if (cpu_isset(cpu, timer_bcast_ipi))
+		lvtt_value |= APIC_LVT_MASKED;
+
 	apic_write_around(APIC_LVTT, lvtt_value);
 
 	/*
@@ -1072,7 +1081,7 @@ void __devinit setup_secondary_APIC_clock(void)
 	setup_APIC_timer(calibration_result);
 }
 
-void __devinit disable_APIC_timer(void)
+void disable_APIC_timer(void)
 {
 	if (using_apic_timer) {
 		unsigned long v;
@@ -1084,41 +1093,42 @@ void __devinit disable_APIC_timer(void)
 
 void enable_APIC_timer(void)
 {
-	if (using_apic_timer) {
+	int cpu = smp_processor_id();
+
+	if (using_apic_timer &&
+	    !cpu_isset(cpu, timer_bcast_ipi)) {
 		unsigned long v;
 
 		v = apic_read(APIC_LVTT);
 		apic_write_around(APIC_LVTT, v & ~APIC_LVT_MASKED);
 	}
 }
 
-/*
- * the frequency of the profiling timer can be changed
- * by writing a multiplier value into /proc/profile.
- */
-int setup_profiling_timer(unsigned int multiplier)
+void switch_APIC_timer_to_ipi(void *cpumask)
 {
-	int i;
+	cpumask_t mask = *(cpumask_t *)cpumask;
+	int cpu = smp_processor_id();
 
-	/*
-	 * Sanity check. [at least 500 APIC cycles should be
-	 * between APIC interrupts as a rule of thumb, to avoid
-	 * irqs flooding us]
-	 */
-	if ( (!multiplier) || (calibration_result/multiplier < 500))
-		return -EINVAL;
-
-	/* 
-	 * Set the new multiplier for each CPU. CPUs don't start using the
-	 * new values until the next timer interrupt in which they do process
-	 * accounting. At that time they also adjust their APIC timers
-	 * accordingly.
-	 */
-	for (i = 0; i < NR_CPUS; ++i)
-		per_cpu(prof_multiplier, i) = multiplier;
+	if (cpu_isset(cpu, mask) &&
+	    !cpu_isset(cpu, timer_bcast_ipi)) {
+		disable_APIC_timer();
+		cpu_set(cpu, timer_bcast_ipi);
+	}
+}
+EXPORT_SYMBOL(switch_APIC_timer_to_ipi);
 
-	return 0;
+void switch_ipi_to_APIC_timer(void *cpumask)
+{
+	cpumask_t mask = *(cpumask_t *)cpumask;
+	int cpu = smp_processor_id();
+
+	if (cpu_isset(cpu, mask) &&
+	    cpu_isset(cpu, timer_bcast_ipi)) {
+		cpu_clear(cpu, timer_bcast_ipi);
+		enable_APIC_timer();
+	}
 }
+EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
 
 #undef APIC_DIVISOR
 
@@ -1134,32 +1144,10 @@ int setup_profiling_timer(unsigned int multiplier)
 
 inline void smp_local_timer_interrupt(struct pt_regs * regs)
 {
-	int cpu = smp_processor_id();
-
 	profile_tick(CPU_PROFILING, regs);
-	if (--per_cpu(prof_counter, cpu) <= 0) {
-		/*
-		 * The multiplier may have changed since the last time we got
-		 * to this point as a result of the user writing to
-		 * /proc/profile. In this case we need to adjust the APIC
-		 * timer accordingly.
-		 *
-		 * Interrupts are already masked off at this point.
-		 */
-		per_cpu(prof_counter, cpu) = per_cpu(prof_multiplier, cpu);
-		if (per_cpu(prof_counter, cpu) !=
-					per_cpu(prof_old_multiplier, cpu)) {
-			__setup_APIC_LVTT(
-					calibration_result/
-					per_cpu(prof_counter, cpu));
-			per_cpu(prof_old_multiplier, cpu) =
-						per_cpu(prof_counter, cpu);
-		}
-
 #ifdef CONFIG_SMP
-		update_process_times(user_mode_vm(regs));
+	update_process_times(user_mode_vm(regs));
 #endif
-	}
 
 	/*
 	 * We take the 'long' return path, and there every subsystem
@@ -1206,6 +1194,43 @@ fastcall void smp_apic_timer_interrupt(struct pt_regs *regs)
 	irq_exit();
 }
 
+#ifndef CONFIG_SMP
+static void up_apic_timer_interrupt_call(struct pt_regs *regs)
+{
+	int cpu = smp_processor_id();
+
+	/*
+	 * the NMI deadlock-detector uses this.
+	 */
+	per_cpu(irq_stat, cpu).apic_timer_irqs++;
+
+	smp_local_timer_interrupt(regs);
+}
+#endif
+
+void smp_send_timer_broadcast_ipi(struct pt_regs *regs)
+{
+	cpumask_t mask;
+
+	cpus_and(mask, cpu_online_map, timer_bcast_ipi);
+	if (!cpus_empty(mask)) {
+#ifdef CONFIG_SMP
+		send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
+#else
+		/*
+		 * We can directly call the apic timer interrupt handler
+		 * in UP case. Minus all irq related functions
+		 */
+		up_apic_timer_interrupt_call(regs);
+#endif
+	}
+}
+
+int setup_profiling_timer(unsigned int multiplier)
+{
+	return -EINVAL;
+}
+
 /*
  * This interrupt should _never_ happen with our APIC/SMP architecture
  */