swsusp updates

swsusp updates

[Pavel Machek]

Hi!

This updates swsusp: CONFIG_SOFTWARE_SUSPEND and CONFIG_ACPI_SLEEP are
separated (it was getting users *badly* confused), remove too noisy
printk's, correctly restore console after S3, fixes suspend on
machines using yenta_socket.c, fixes some comments, cleans up
"interesting" macro mess in suspend.c, no longer eats filesystems when
process is ^Z-ed before suspend. Please apply,

								Pavel

Index: linux/drivers/acpi/sleep/main.c
===================================================================
--- linux.orig/drivers/acpi/sleep/main.c	2003-07-22 13:39:42.000000000 +0200
+++ linux/drivers/acpi/sleep/main.c	2003-07-22 12:53:27.000000000 +0200
@@ -69,10 +81,6 @@
  * First, we call to the device driver layer to save device state.
  * Once we have that, we save whatevery processor and kernel state we
  * need to memory.
- * If we're entering S4, we then write the memory image to disk.
- *
- * Only then is it safe for us to power down devices, since we may need
- * the disks and upstream buses to write to.
  */
 acpi_status
 acpi_system_save_state(
@@ -197,7 +205,7 @@
 		break;
 	}
 	local_irq_restore(flags);
-	printk(KERN_CRIT "Back to C!\n");
+	printk(KERN_DEBUG "Back to C!\n");
 
 	return status;
 }
@@ -226,6 +234,7 @@
 	if (state == ACPI_STATE_S4 && !acpi_gbl_FACS->S4bios_f)
 		return AE_ERROR;
 
+	prepare_suspend_console();
 	/*
 	 * TBD: S1 can be done without device_suspend.  Make a CONFIG_XX
 	 * to handle however when S1 failed without device_suspend.
@@ -270,6 +279,7 @@
 	/* reset firmware waking vector */
 	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
 	thaw_processes();
+	restore_console();
 
 	return status;
 }
Index: linux/arch/i386/kernel/Makefile
===================================================================
--- linux.orig/arch/i386/kernel/Makefile	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/Makefile	2003-07-17 22:22:58.000000000 +0200
@@ -24,7 +24,8 @@
 obj-$(CONFIG_X86_MPPARSE)	+= mpparse.o
 obj-$(CONFIG_X86_LOCAL_APIC)	+= apic.o nmi.o
 obj-$(CONFIG_X86_IO_APIC)	+= io_apic.o
-obj-$(CONFIG_SOFTWARE_SUSPEND)	+= suspend.o suspend_asm.o
+obj-$(CONFIG_SOFTWARE_SUSPEND)	+= suspend.o
+obj-$(CONFIG_PM)		+= suspend_asm.o
 obj-$(CONFIG_X86_NUMAQ)		+= numaq.o
 obj-$(CONFIG_X86_SUMMIT)	+= summit.o
 obj-$(CONFIG_EDD)             	+= edd.o
Index: linux/arch/i386/kernel/suspend_asm.S
===================================================================
--- linux.orig/arch/i386/kernel/suspend_asm.S	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/suspend_asm.S	2003-07-20 15:02:12.000000000 +0200
@@ -32,6 +32,7 @@
 saved_context_eflags:
 	.long	0
 
+#ifdef CONFIG_SOFTWARE_SUSPEND
 	.text
 
 ENTRY(do_magic)
@@ -117,4 +118,4 @@
 loop2:
        .quad 0
        .previous
-	
\ No newline at end of file
+#endif
Index: linux/arch/i386/kernel/sysenter.c
===================================================================
--- linux.orig/arch/i386/kernel/sysenter.c	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/sysenter.c	2003-07-17 22:22:58.000000000 +0200
@@ -31,8 +31,6 @@
 	wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
 	wrmsr(MSR_IA32_SYSENTER_ESP, tss->esp1, 0);
 	wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) sysenter_entry, 0);
-
-	printk("Enabling SEP on CPU %d\n", cpu);
 	put_cpu();	
 }
 
Index: linux/drivers/acpi/Kconfig
===================================================================
--- linux.orig/drivers/acpi/Kconfig	2003-07-22 13:39:42.000000000 +0200
+++ linux/drivers/acpi/Kconfig	2003-07-17 22:22:58.000000000 +0200
@@ -58,8 +58,8 @@
 	default y
 
 config ACPI_SLEEP
-	bool "Sleep States"
-	depends on X86 && ACPI && !ACPI_HT_ONLY && SOFTWARE_SUSPEND
+	bool "Sleep States (EXPERIMENTAL)"
+	depends on X86 && ACPI && !ACPI_HT_ONLY && EXPERIMENTAL
 	---help---
 	  This option adds support for ACPI suspend states. 
 
Index: linux/drivers/base/power.c
===================================================================
--- linux.orig/drivers/base/power.c	2003-07-22 13:39:42.000000000 +0200
+++ linux/drivers/base/power.c	2003-07-17 22:22:58.000000000 +0200
@@ -52,8 +52,6 @@
 	struct device * dev;
 	int error = 0;
 
-	printk(KERN_EMERG "Suspending devices\n");
-
 	down_write(&devices_subsys.rwsem);
 	list_for_each_entry_reverse(dev,&devices_subsys.kset.list,kobj.entry) {
 		if (dev->driver && dev->driver->suspend) {
@@ -114,8 +112,6 @@
 		}
 	}
 	up_write(&devices_subsys.rwsem);
-
-	printk(KERN_EMERG "Devices Resumed\n");
 }
 
 /**
@@ -125,8 +121,6 @@
 {
 	struct device * dev;
 	
-	printk(KERN_EMERG "Shutting down devices\n");
-
 	down_write(&devices_subsys.rwsem);
 	list_for_each_entry_reverse(dev,&devices_subsys.kset.list,kobj.entry) {
 		pr_debug("shutting down %s: ",dev->name);
Index: linux/drivers/pcmcia/yenta_socket.c
===================================================================
--- linux.orig/drivers/pcmcia/yenta_socket.c	2003-07-22 13:39:42.000000000 +0200
+++ linux/drivers/pcmcia/yenta_socket.c	2003-07-17 22:22:58.000000000 +0200
@@ -899,7 +899,10 @@
 
 static int yenta_dev_suspend (struct pci_dev *dev, u32 state)
 {
-	return pcmcia_socket_dev_suspend(&dev->dev, state, 0);
+	/* FIXME: We should really let devices to act on *all* levels :-(.
+	   If you put something else than SUSPEND_SAVE_STATE,
+	   pcmcia_socket_dev_suspend() will simply do nothing due to its check. */
+	return pcmcia_socket_dev_suspend(&dev->dev, state, SUSPEND_SAVE_STATE);
 }
 
 
Index: linux/include/linux/reboot.h
===================================================================
--- linux.orig/include/linux/reboot.h	2003-07-22 13:39:42.000000000 +0200
+++ linux/include/linux/reboot.h	2003-07-17 22:22:58.000000000 +0200
@@ -21,7 +21,7 @@
  * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
  * POWER_OFF   Stop OS and remove all power from system, if possible.
  * RESTART2    Restart system using given command string.
- * SW_SUSPEND  Suspend system using Software Suspend if compiled in
+ * SW_SUSPEND  Suspend system using software suspend if compiled in.
  */
 
 #define	LINUX_REBOOT_CMD_RESTART	0x01234567
Index: linux/include/linux/suspend.h
===================================================================
--- linux.orig/include/linux/suspend.h	2003-07-22 13:39:42.000000000 +0200
+++ linux/include/linux/suspend.h	2003-07-22 12:54:08.000000000 +0200
@@ -55,10 +55,6 @@
 
 extern int register_suspend_notifier(struct notifier_block *);
 extern int unregister_suspend_notifier(struct notifier_block *);
-extern void refrigerator(unsigned long);
-
-extern int freeze_processes(void);
-extern void thaw_processes(void);
 
 extern unsigned int nr_copy_pages __nosavedata;
 extern suspend_pagedir_t *pagedir_nosave __nosavedata;
@@ -76,15 +72,23 @@
 extern void do_suspend_lowlevel_s4bios(int resume);
 
 #else
-static inline void software_suspend(void)
-{
-}
+static inline void software_suspend(void) { }
 #define software_resume()		do { } while(0)
 #define register_suspend_notifier(a)	do { } while(0)
 #define unregister_suspend_notifier(a)	do { } while(0)
+#endif
+
+#ifdef CONFIG_PM
+extern void refrigerator(unsigned long);
+extern int freeze_processes(void);
+extern void thaw_processes(void);
+#else
 #define refrigerator(a)			do { BUG(); } while(0)
 #define freeze_processes()		do { panic("You need CONFIG_SOFTWARE_SUSPEND to do sleeps."); } while(0)
 #define thaw_processes()		do { } while(0)
 #endif
 
+extern int prepare_suspend_console(void);
+extern void restore_console(void);
+
 #endif /* _LINUX_SWSUSP_H */
Index: linux/kernel/Makefile
===================================================================
--- linux.orig/kernel/Makefile	2003-07-22 13:39:43.000000000 +0200
+++ linux/kernel/Makefile	2003-07-17 22:22:58.000000000 +0200
@@ -17,7 +17,7 @@
 obj-$(CONFIG_PM) += pm.o
 obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
-obj-$(CONFIG_SOFTWARE_SUSPEND) += suspend.o
+obj-$(CONFIG_PM) += suspend.o
 obj-$(CONFIG_COMPAT) += compat.o
 
 ifneq ($(CONFIG_IA64),y)
Index: linux/kernel/suspend.c
===================================================================
--- linux.orig/kernel/suspend.c	2003-07-22 13:39:43.000000000 +0200
+++ linux/kernel/suspend.c	2003-07-22 13:46:26.000000000 +0200
@@ -5,7 +5,7 @@
  * machine suspend feature using pretty near only high-level routines
  *
  * Copyright (C) 1998-2001 Gabor Kuti <seasons@fornax.hu>
- * Copyright (C) 1998,2001,2002 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 1998,2001-2003 Pavel Machek <pavel@suse.cz>
  *
  * I'd like to thank the following people for their work:
  * 
@@ -65,6 +65,7 @@
 #include <asm/pgtable.h>
 #include <asm/io.h>
 
+#ifdef CONFIG_SOFTWARE_SUSPEND
 extern long sys_sync(void);
 
 unsigned char software_suspend_enabled = 0;
@@ -78,7 +79,6 @@
 #undef SUSPEND_CONSOLE
 #endif
 
-#define TIMEOUT	(6 * HZ)			/* Timeout for stopping processes */
 #define __ADDRESS(x)  ((unsigned long) phys_to_virt(x))
 #define ADDRESS(x) __ADDRESS((x) << PAGE_SHIFT)
 #define ADDRESS2(x) __ADDRESS(__pa(x))		/* Needed for x86-64 where some pages are in memory twice */
@@ -139,39 +139,45 @@
 
 static const char name_suspend[] = "Suspend Machine: ";
 static const char name_resume[] = "Resume Machine: ";
+#endif
 
 /*
  * Debug
  */
-#define	DEBUG_DEFAULT
-#undef	DEBUG_PROCESS
+#undef	DEBUG_DEFAULT
 #undef	DEBUG_SLOW
-#define TEST_SWSUSP 0		/* Set to 1 to reboot instead of halt machine after suspension */
+#define TEST_SWSUSP 0		/* Set to 1 to reboot instead of halt machine after suspension */
 
 #ifdef DEBUG_DEFAULT
-# define PRINTK(f, a...)       printk(f, ## a)
+# define PRINTK(f, a...)	printk(f, ## a)
 #else
-# define PRINTK(f, a...)
+# define PRINTK(f, a...)	do {} while (0)
 #endif
 
 #ifdef DEBUG_SLOW
 #define MDELAY(a) mdelay(a)
 #else
-#define MDELAY(a)
+#define MDELAY(a) do {} while (0)
 #endif
 
 /*
  * Refrigerator and related stuff
  */
 
-#define INTERESTING(p) \
-			/* We don't want to touch kernel_threads..*/ \
-			if (p->flags & PF_IOTHREAD) \
-				continue; \
-			if (p == current) \
-				continue; \
-			if (p->state == TASK_ZOMBIE) \
-				continue;
+/* 0 = Ignore this process when freezing/thawing, 1 = freeze/thaw this process */
+static inline int interesting_process(struct task_struct *p)
+{
+	if (p->flags & PF_IOTHREAD)
+		return 0;
+	if (p == current)
+		return 0;
+	if ((p->state == TASK_ZOMBIE) || (p->state == TASK_DEAD))
+		return 0;
+
+	return 1;
+}
+
+#define TIMEOUT	(6 * HZ)			/* Timeout for stopping processes */
 
 /* Refrigerator is place where frozen processes are stored :-). */
 void refrigerator(unsigned long flag)
@@ -212,9 +218,12 @@
 		read_lock(&tasklist_lock);
 		do_each_thread(g, p) {
 			unsigned long flags;
-			INTERESTING(p);
+			if (!interesting_process(p))
+				continue;
 			if (p->flags & PF_FROZEN)
 				continue;
+			if (p->state == TASK_STOPPED)
+				continue;
 
 			/* FIXME: smp problem here: we may not access other process' flags
 			   without locking */
@@ -245,19 +254,56 @@
 	printk( "Restarting tasks..." );
 	read_lock(&tasklist_lock);
 	do_each_thread(g, p) {
-		INTERESTING(p);
-		
-		if (p->flags & PF_FROZEN) p->flags &= ~PF_FROZEN;
-		else
-			printk(KERN_INFO " Strange, %s not stopped\n", p->comm );
-		wake_up_process(p);
+ 		if (!interesting_process(p))
+			continue;
+ 		if (p->flags & PF_FROZEN) {
+ 			p->flags &= ~PF_FROZEN;
+ 			wake_up_process(p);
+ 		} else
+ 			PRINTK(KERN_INFO " Strange, %s not frozen\n", p->comm );
 	} while_each_thread(g, p);
 
 	read_unlock(&tasklist_lock);
+	schedule();
 	printk( " done\n" );
 	MDELAY(500);
 }
 
+int prepare_suspend_console(void)
+{
+	orig_loglevel = console_loglevel;
+	console_loglevel = new_loglevel;
+
+#ifdef CONFIG_VT
+	orig_fgconsole = fg_console;
+#ifdef SUSPEND_CONSOLE
+	if(vc_allocate(SUSPEND_CONSOLE))
+	  /* we can't have a free VC for now. Too bad,
+	   * we don't want to mess the screen for now. */
+		return 1;
+
+	set_console (SUSPEND_CONSOLE);
+	if (vt_waitactive(SUSPEND_CONSOLE)) {
+		printk(KERN_ERR "Bummer. Can't switch VCs.\n");
+		return 1;
+	}
+	orig_kmsg = kmsg_redirect;
+	kmsg_redirect = SUSPEND_CONSOLE;
+#endif
+#endif
+	return 0;
+}
+
+void restore_console(void)
+{
+	console_loglevel = orig_loglevel;
+#ifdef SUSPEND_CONSOLE
+	set_console (orig_fgconsole);
+#endif
+	return;
+}
+
+#ifdef CONFIG_SOFTWARE_SUSPEND
 /*
  * Saving part...
  */
@@ -283,17 +329,6 @@
 	return 0;
 }
 
-/*
- * This is our sync function. With this solution we probably won't sleep
- * but that should not be a problem since tasks are stopped..
- */
-
-static inline void do_suspend_sync(void)
-{
-	blk_run_queues();
-#warning This might be broken. We need to somehow wait for data to reach the disk
-}
-
 /* We memorize in swapfile_used what swap devices are used for suspension */
 #define SWAPFILE_UNUSED    0
 #define SWAPFILE_SUSPEND   1	/* This is the suspending device */
@@ -561,7 +596,6 @@
 			free_suspend_pagedir((unsigned long) pagedir);
 			return NULL;
 		}
-		printk(".");
 		SetPageNosave(virt_to_page(p->address));
 		p->orig_address = 0;
 		p++;
@@ -569,39 +603,6 @@
 	return pagedir;
 }
 
-static int prepare_suspend_console(void)
-{
-	orig_loglevel = console_loglevel;
-	console_loglevel = new_loglevel;
-
-#ifdef CONFIG_VT
-	orig_fgconsole = fg_console;
-#ifdef SUSPEND_CONSOLE
-	if(vc_allocate(SUSPEND_CONSOLE))
-	  /* we can't have a free VC for now. Too bad,
-	   * we don't want to mess the screen for now. */
-		return 1;
-
-	set_console (SUSPEND_CONSOLE);
-	if(vt_waitactive(SUSPEND_CONSOLE)) {
-		PRINTK("Bummer. Can't switch VCs.");
-		return 1;
-	}
-	orig_kmsg = kmsg_redirect;
-	kmsg_redirect = SUSPEND_CONSOLE;
-#endif
-#endif
-	return 0;
-}
-
-static void restore_console(void)
-{
-	console_loglevel = orig_loglevel;
-#ifdef SUSPEND_CONSOLE
-	set_console (orig_fgconsole);
-#endif
-	return;
-}
 
 static int prepare_suspend_processes(void)
 {
@@ -852,7 +853,6 @@
 	free_pages((unsigned long) pagedir_nosave, pagedir_order);
 	spin_unlock_irq(&suspend_pagedir_lock);
 	mark_swapfiles(((swp_entry_t) {0}), MARK_SWAP_RESUME);
-	PRINTK(KERN_WARNING "%sLeaving do_magic_suspend_2...\n", name_suspend);	
 }
 
 static void do_software_suspend(void)
@@ -861,20 +861,13 @@
 	if (prepare_suspend_console())
 		printk( "%sCan't allocate a console... proceeding\n", name_suspend);
 	if (!prepare_suspend_processes()) {
-
 		/* At this point, all user processes and "dangerous"
                    kernel threads are stopped. Free some memory, as we
                    need half of memory free. */
-
 		free_some_memory();
 		
-		/* No need to invalidate any vfsmnt list -- they will be valid after resume, anyway.
-		 *
-		 * We sync here -- so you have consistent filesystem state when things go wrong.
-		 * -- so that noone writes to disk after we do atomic copy of data.
-		 */
-		PRINTK("Syncing disks before copy\n");
-		do_suspend_sync();
+		/* No need to invalidate any vfsmnt list -- they will be valid after resume, anyway. */
+		blk_run_queues();
 
 		/* Save state of all device drivers, and stop them. */		   
 		if(drivers_suspend()==0)
@@ -888,12 +881,11 @@
 			 * using normal kernel mechanism.
 			 */
 			do_magic(0);
-		PRINTK("Restarting processes...\n");
 		thaw_processes();
 	}
 	software_suspend_enabled = 1;
 	MDELAY(1000);
-	restore_console ();
+	restore_console();
 }
 
 /*
@@ -906,7 +898,7 @@
 		return;
 
 	software_suspend_enabled = 0;
-	BUG_ON(in_interrupt());
+	BUG_ON(in_atomic());
 	do_software_suspend();
 }
 
@@ -1279,4 +1271,5 @@
 
 EXPORT_SYMBOL(software_suspend);
 EXPORT_SYMBOL(software_suspend_enabled);
+#endif
 EXPORT_SYMBOL(refrigerator);
Index: linux/arch/i386/kernel/acpi/wakeup.S
===================================================================
--- linux.orig/arch/i386/kernel/acpi/wakeup.S	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/acpi/wakeup.S	2003-07-22 13:26:01.000000000 +0200
@@ -43,6 +43,11 @@
 
 	testl	$1, video_flags - wakeup_code
 	jz	1f
+	/* It is miracle that this works:
+	   * PCI may or may not be initialized at this point
+	   * I'm told we should pass device ID to video bios
+	   However it works on some real machines...
+	 */
 	lcall   $0xc000,$3
 	movw	%cs, %ax
 	movw	%ax, %ds					# Bios might have played with that



-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]

Re: swsusp updates

[Patrick Mochel]

> This updates swsusp: CONFIG_SOFTWARE_SUSPEND and CONFIG_ACPI_SLEEP are
> separated (it was getting users *badly* confused), remove too noisy
> printk's, correctly restore console after S3, fixes suspend on
> machines using yenta_socket.c, fixes some comments, cleans up
> "interesting" macro mess in suspend.c, no longer eats filesystems when
> process is ^Z-ed before suspend. Please apply,

Could you please split these patches up into different functional patches, 
and submit them to the appropriate maintainers? 


	-pat

Re: swsusp updates

[Pavel Machek]

Hi!

> > This updates swsusp: CONFIG_SOFTWARE_SUSPEND and CONFIG_ACPI_SLEEP are
> > separated (it was getting users *badly* confused), remove too noisy
> > printk's, correctly restore console after S3, fixes suspend on
> > machines using yenta_socket.c, fixes some comments, cleans up
> > "interesting" macro mess in suspend.c, no longer eats filesystems when
> > process is ^Z-ed before suspend. Please apply,
> 
> Could you please split these patches up into different functional patches, 
> and submit them to the appropriate maintainers? 

SOFTWARE SUSPEND:
P:      Pavel Machek
M:      pavel@suse.cz
M:      pavel@ucw.cz
L:      http://lister.fornax.hu/mailman/listinfo/swsusp
W:      http://swsusp.sf.net/
S:      Maintained

Other parts are trivial (ACPI and yenta), and pretty obvious.
									Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]

Re: swsusp updates

[Patrick Mochel]

> > > This updates swsusp: CONFIG_SOFTWARE_SUSPEND and CONFIG_ACPI_SLEEP are
> > > separated (it was getting users *badly* confused), remove too noisy
> > > printk's, correctly restore console after S3, fixes suspend on
> > > machines using yenta_socket.c, fixes some comments, cleans up
> > > "interesting" macro mess in suspend.c, no longer eats filesystems when
> > > process is ^Z-ed before suspend. Please apply,
> > 
> > Could you please split these patches up into different functional patches, 
> > and submit them to the appropriate maintainers? 
> 
> SOFTWARE SUSPEND:
> P:      Pavel Machek
> M:      pavel@suse.cz
> M:      pavel@ucw.cz
> L:      http://lister.fornax.hu/mailman/listinfo/swsusp
> W:      http://swsusp.sf.net/
> S:      Maintained
> 
> Other parts are trivial (ACPI and yenta), and pretty obvious.

Could you please split these patches up into different functional patches 
and submit the relevant bits to the appropriate maintainers? 

Thanks,


	-pat

Re: swsusp updates

[Pavel Machek]

Hi!

> > > > This updates swsusp: CONFIG_SOFTWARE_SUSPEND and CONFIG_ACPI_SLEEP are
> > > > separated (it was getting users *badly* confused), remove too noisy
> > > > printk's, correctly restore console after S3, fixes suspend on
> > > > machines using yenta_socket.c, fixes some comments, cleans up
> > > > "interesting" macro mess in suspend.c, no longer eats filesystems when
> > > > process is ^Z-ed before suspend. Please apply,
> > > 
> > > Could you please split these patches up into different functional patches, 
> > > and submit them to the appropriate maintainers? 
> > 
> > SOFTWARE SUSPEND:
> > P:      Pavel Machek
> > M:      pavel@suse.cz
> > M:      pavel@ucw.cz
> > L:      http://lister.fornax.hu/mailman/listinfo/swsusp
> > W:      http://swsusp.sf.net/
> > S:      Maintained
> > 
> > Other parts are trivial (ACPI and yenta), and pretty obvious.
> 
> Could you please split these patches up into different functional patches 
> and submit the relevant bits to the appropriate maintainers? 

Okay, I killed few trivial hunks, will submit them through trivial
patch monkey. Are you happy now, patrick?
								Pavel
Index: linux/arch/i386/kernel/Makefile
===================================================================
--- linux.orig/arch/i386/kernel/Makefile	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/Makefile	2003-07-17 22:22:58.000000000 +0200
@@ -24,7 +24,8 @@
 obj-$(CONFIG_X86_MPPARSE)	+= mpparse.o
 obj-$(CONFIG_X86_LOCAL_APIC)	+= apic.o nmi.o
 obj-$(CONFIG_X86_IO_APIC)	+= io_apic.o
-obj-$(CONFIG_SOFTWARE_SUSPEND)	+= suspend.o suspend_asm.o
+obj-$(CONFIG_SOFTWARE_SUSPEND)	+= suspend.o
+obj-$(CONFIG_PM)		+= suspend_asm.o
 obj-$(CONFIG_X86_NUMAQ)		+= numaq.o
 obj-$(CONFIG_X86_SUMMIT)	+= summit.o
 obj-$(CONFIG_EDD)             	+= edd.o
Index: linux/arch/i386/kernel/suspend_asm.S
===================================================================
--- linux.orig/arch/i386/kernel/suspend_asm.S	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/suspend_asm.S	2003-07-20 15:02:12.000000000 +0200
@@ -32,6 +32,7 @@
 saved_context_eflags:
 	.long	0
 
+#ifdef CONFIG_SOFTWARE_SUSPEND
 	.text
 
 ENTRY(do_magic)
@@ -117,4 +118,4 @@
 loop2:
        .quad 0
        .previous
-	
\ No newline at end of file
+#endif
Index: linux/arch/i386/kernel/sysenter.c
===================================================================
--- linux.orig/arch/i386/kernel/sysenter.c	2003-07-22 13:39:42.000000000 +0200
+++ linux/arch/i386/kernel/sysenter.c	2003-07-17 22:22:58.000000000 +0200
@@ -31,8 +31,6 @@
 	wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
 	wrmsr(MSR_IA32_SYSENTER_ESP, tss->esp1, 0);
 	wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) sysenter_entry, 0);
-
-	printk("Enabling SEP on CPU %d\n", cpu);
 	put_cpu();	
 }
 
Index: linux/drivers/acpi/Kconfig
===================================================================
--- linux.orig/drivers/acpi/Kconfig	2003-07-22 13:39:42.000000000 +0200
+++ linux/drivers/acpi/Kconfig	2003-07-17 22:22:58.000000000 +0200
@@ -58,8 +58,8 @@
 	default y
 
 config ACPI_SLEEP
-	bool "Sleep States"
-	depends on X86 && ACPI && !ACPI_HT_ONLY && SOFTWARE_SUSPEND
+	bool "Sleep States (EXPERIMENTAL)"
+	depends on X86 && ACPI && !ACPI_HT_ONLY && EXPERIMENTAL
 	---help---
 	  This option adds support for ACPI suspend states. 
 
Index: linux/include/linux/reboot.h
===================================================================
--- linux.orig/include/linux/reboot.h	2003-07-22 13:39:42.000000000 +0200
+++ linux/include/linux/reboot.h	2003-07-17 22:22:58.000000000 +0200
@@ -21,7 +21,7 @@
  * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
  * POWER_OFF   Stop OS and remove all power from system, if possible.
  * RESTART2    Restart system using given command string.
- * SW_SUSPEND  Suspend system using Software Suspend if compiled in
+ * SW_SUSPEND  Suspend system using software suspend if compiled in.
  */
 
 #define	LINUX_REBOOT_CMD_RESTART	0x01234567
Index: linux/include/linux/suspend.h
===================================================================
--- linux.orig/include/linux/suspend.h	2003-07-22 13:39:42.000000000 +0200
+++ linux/include/linux/suspend.h	2003-07-22 12:54:08.000000000 +0200
@@ -55,10 +55,6 @@
 
 extern int register_suspend_notifier(struct notifier_block *);
 extern int unregister_suspend_notifier(struct notifier_block *);
-extern void refrigerator(unsigned long);
-
-extern int freeze_processes(void);
-extern void thaw_processes(void);
 
 extern unsigned int nr_copy_pages __nosavedata;
 extern suspend_pagedir_t *pagedir_nosave __nosavedata;
@@ -76,15 +72,23 @@
 extern void do_suspend_lowlevel_s4bios(int resume);
 
 #else
-static inline void software_suspend(void)
-{
-}
+static inline void software_suspend(void) { }
 #define software_resume()		do { } while(0)
 #define register_suspend_notifier(a)	do { } while(0)
 #define unregister_suspend_notifier(a)	do { } while(0)
+#endif
+
+#ifdef CONFIG_PM
+extern void refrigerator(unsigned long);
+extern int freeze_processes(void);
+extern void thaw_processes(void);
+#else
 #define refrigerator(a)			do { BUG(); } while(0)
 #define freeze_processes()		do { panic("You need CONFIG_SOFTWARE_SUSPEND to do sleeps."); } while(0)
 #define thaw_processes()		do { } while(0)
 #endif
 
+extern int prepare_suspend_console(void);
+extern void restore_console(void);
+
 #endif /* _LINUX_SWSUSP_H */
Index: linux/kernel/Makefile
===================================================================
--- linux.orig/kernel/Makefile	2003-07-22 13:39:43.000000000 +0200
+++ linux/kernel/Makefile	2003-07-17 22:22:58.000000000 +0200
@@ -17,7 +17,7 @@
 obj-$(CONFIG_PM) += pm.o
 obj-$(CONFIG_CPU_FREQ) += cpufreq.o
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
-obj-$(CONFIG_SOFTWARE_SUSPEND) += suspend.o
+obj-$(CONFIG_PM) += suspend.o
 obj-$(CONFIG_COMPAT) += compat.o
 
 ifneq ($(CONFIG_IA64),y)
Index: linux/kernel/suspend.c
===================================================================
--- linux.orig/kernel/suspend.c	2003-07-22 13:39:43.000000000 +0200
+++ linux/kernel/suspend.c	2003-07-22 13:46:26.000000000 +0200
@@ -5,7 +5,7 @@
  * machine suspend feature using pretty near only high-level routines
  *
  * Copyright (C) 1998-2001 Gabor Kuti <seasons@fornax.hu>
- * Copyright (C) 1998,2001,2002 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 1998,2001-2003 Pavel Machek <pavel@suse.cz>
  *
  * I'd like to thank the following people for their work:
  * 
@@ -65,6 +65,7 @@
 #include <asm/pgtable.h>
 #include <asm/io.h>
 
+#ifdef CONFIG_SOFTWARE_SUSPEND
 extern long sys_sync(void);
 
 unsigned char software_suspend_enabled = 0;
@@ -78,7 +79,6 @@
 #undef SUSPEND_CONSOLE
 #endif
 
-#define TIMEOUT	(6 * HZ)			/* Timeout for stopping processes */
 #define __ADDRESS(x)  ((unsigned long) phys_to_virt(x))
 #define ADDRESS(x) __ADDRESS((x) << PAGE_SHIFT)
 #define ADDRESS2(x) __ADDRESS(__pa(x))		/* Needed for x86-64 where some pages are in memory twice */
@@ -139,39 +139,45 @@
 
 static const char name_suspend[] = "Suspend Machine: ";
 static const char name_resume[] = "Resume Machine: ";
+#endif
 
 /*
  * Debug
  */
-#define	DEBUG_DEFAULT
-#undef	DEBUG_PROCESS
+#undef	DEBUG_DEFAULT
 #undef	DEBUG_SLOW
-#define TEST_SWSUSP 0		/* Set to 1 to reboot instead of halt machine after suspension */
+#define TEST_SWSUSP 0		/* Set to 1 to reboot instead of halt machine after suspension */
 
 #ifdef DEBUG_DEFAULT
-# define PRINTK(f, a...)       printk(f, ## a)
+# define PRINTK(f, a...)	printk(f, ## a)
 #else
-# define PRINTK(f, a...)
+# define PRINTK(f, a...)	do {} while (0)
 #endif
 
 #ifdef DEBUG_SLOW
 #define MDELAY(a) mdelay(a)
 #else
-#define MDELAY(a)
+#define MDELAY(a) do {} while (0)
 #endif
 
 /*
  * Refrigerator and related stuff
  */
 
-#define INTERESTING(p) \
-			/* We don't want to touch kernel_threads..*/ \
-			if (p->flags & PF_IOTHREAD) \
-				continue; \
-			if (p == current) \
-				continue; \
-			if (p->state == TASK_ZOMBIE) \
-				continue;
+/* 0 = Ignore this process when freezing/thawing, 1 = freeze/thaw this process */
+static inline int interesting_process(struct task_struct *p)
+{
+	if (p->flags & PF_IOTHREAD)
+		return 0;
+	if (p == current)
+		return 0;
+	if ((p->state == TASK_ZOMBIE) || (p->state == TASK_DEAD))
+		return 0;
+
+	return 1;
+}
+
+#define TIMEOUT	(6 * HZ)			/* Timeout for stopping processes */
 
 /* Refrigerator is place where frozen processes are stored :-). */
 void refrigerator(unsigned long flag)
@@ -212,9 +218,12 @@
 		read_lock(&tasklist_lock);
 		do_each_thread(g, p) {
 			unsigned long flags;
-			INTERESTING(p);
+			if (!interesting_process(p))
+				continue;
 			if (p->flags & PF_FROZEN)
 				continue;
+			if (p->state == TASK_STOPPED)
+				continue;
 
 			/* FIXME: smp problem here: we may not access other process' flags
 			   without locking */
@@ -245,19 +254,56 @@
 	printk( "Restarting tasks..." );
 	read_lock(&tasklist_lock);
 	do_each_thread(g, p) {
-		INTERESTING(p);
-		
-		if (p->flags & PF_FROZEN) p->flags &= ~PF_FROZEN;
-		else
-			printk(KERN_INFO " Strange, %s not stopped\n", p->comm );
-		wake_up_process(p);
+ 		if (!interesting_process(p))
+			continue;
+ 		if (p->flags & PF_FROZEN) {
+ 			p->flags &= ~PF_FROZEN;
+ 			wake_up_process(p);
+ 		} else
+ 			PRINTK(KERN_INFO " Strange, %s not frozen\n", p->comm );
 	} while_each_thread(g, p);
 
 	read_unlock(&tasklist_lock);
+	schedule();
 	printk( " done\n" );
 	MDELAY(500);
 }
 
+int prepare_suspend_console(void)
+{
+	orig_loglevel = console_loglevel;
+	console_loglevel = new_loglevel;
+
+#ifdef CONFIG_VT
+	orig_fgconsole = fg_console;
+#ifdef SUSPEND_CONSOLE
+	if(vc_allocate(SUSPEND_CONSOLE))
+	  /* we can't have a free VC for now. Too bad,
+	   * we don't want to mess the screen for now. */
+		return 1;
+
+	set_console (SUSPEND_CONSOLE);
+	if (vt_waitactive(SUSPEND_CONSOLE)) {
+		printk(KERN_ERR "Bummer. Can't switch VCs.\n");
+		return 1;
+	}
+	orig_kmsg = kmsg_redirect;
+	kmsg_redirect = SUSPEND_CONSOLE;
+#endif
+#endif
+	return 0;
+}
+
+void restore_console(void)
+{
+	console_loglevel = orig_loglevel;
+#ifdef SUSPEND_CONSOLE
+	set_console (orig_fgconsole);
+#endif
+	return;
+}
+
+#ifdef CONFIG_SOFTWARE_SUSPEND
 /*
  * Saving part...
  */
@@ -283,17 +329,6 @@
 	return 0;
 }
 
-/*
- * This is our sync function. With this solution we probably won't sleep
- * but that should not be a problem since tasks are stopped..
- */
-
-static inline void do_suspend_sync(void)
-{
-	blk_run_queues();
-#warning This might be broken. We need to somehow wait for data to reach the disk
-}
-
 /* We memorize in swapfile_used what swap devices are used for suspension */
 #define SWAPFILE_UNUSED    0
 #define SWAPFILE_SUSPEND   1	/* This is the suspending device */
@@ -561,7 +596,6 @@
 			free_suspend_pagedir((unsigned long) pagedir);
 			return NULL;
 		}
-		printk(".");
 		SetPageNosave(virt_to_page(p->address));
 		p->orig_address = 0;
 		p++;
@@ -569,39 +603,6 @@
 	return pagedir;
 }
 
-static int prepare_suspend_console(void)
-{
-	orig_loglevel = console_loglevel;
-	console_loglevel = new_loglevel;
-
-#ifdef CONFIG_VT
-	orig_fgconsole = fg_console;
-#ifdef SUSPEND_CONSOLE
-	if(vc_allocate(SUSPEND_CONSOLE))
-	  /* we can't have a free VC for now. Too bad,
-	   * we don't want to mess the screen for now. */
-		return 1;
-
-	set_console (SUSPEND_CONSOLE);
-	if(vt_waitactive(SUSPEND_CONSOLE)) {
-		PRINTK("Bummer. Can't switch VCs.");
-		return 1;
-	}
-	orig_kmsg = kmsg_redirect;
-	kmsg_redirect = SUSPEND_CONSOLE;
-#endif
-#endif
-	return 0;
-}
-
-static void restore_console(void)
-{
-	console_loglevel = orig_loglevel;
-#ifdef SUSPEND_CONSOLE
-	set_console (orig_fgconsole);
-#endif
-	return;
-}
 
 static int prepare_suspend_processes(void)
 {
@@ -852,7 +853,6 @@
 	free_pages((unsigned long) pagedir_nosave, pagedir_order);
 	spin_unlock_irq(&suspend_pagedir_lock);
 	mark_swapfiles(((swp_entry_t) {0}), MARK_SWAP_RESUME);
-	PRINTK(KERN_WARNING "%sLeaving do_magic_suspend_2...\n", name_suspend);	
 }
 
 static void do_software_suspend(void)
@@ -861,20 +861,13 @@
 	if (prepare_suspend_console())
 		printk( "%sCan't allocate a console... proceeding\n", name_suspend);
 	if (!prepare_suspend_processes()) {
-
 		/* At this point, all user processes and "dangerous"
                    kernel threads are stopped. Free some memory, as we
                    need half of memory free. */
-
 		free_some_memory();
 		
-		/* No need to invalidate any vfsmnt list -- they will be valid after resume, anyway.
-		 *
-		 * We sync here -- so you have consistent filesystem state when things go wrong.
-		 * -- so that noone writes to disk after we do atomic copy of data.
-		 */
-		PRINTK("Syncing disks before copy\n");
-		do_suspend_sync();
+		/* No need to invalidate any vfsmnt list -- they will be valid after resume, anyway. */
+		blk_run_queues();
 
 		/* Save state of all device drivers, and stop them. */		   
 		if(drivers_suspend()==0)
@@ -888,12 +881,11 @@
 			 * using normal kernel mechanism.
 			 */
 			do_magic(0);
-		PRINTK("Restarting processes...\n");
 		thaw_processes();
 	}
 	software_suspend_enabled = 1;
 	MDELAY(1000);
-	restore_console ();
+	restore_console();
 }
 
 /*
@@ -906,7 +898,7 @@
 		return;
 
 	software_suspend_enabled = 0;
-	BUG_ON(in_interrupt());
+	BUG_ON(in_atomic());
 	do_software_suspend();
 }
 
@@ -1279,4 +1271,5 @@
 
 EXPORT_SYMBOL(software_suspend);
 EXPORT_SYMBOL(software_suspend_enabled);
+#endif
 EXPORT_SYMBOL(refrigerator);


-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]

Re: swsusp updates

[Patrick Mochel]

> Okay, I killed few trivial hunks, will submit them through trivial
> patch monkey. Are you happy now, patrick?

Why do you insist on abusing the trivial patch monkey? Why can't you send 
them directly to the maintainers? For instance, you add/remove printk()s 
and comments that other people may or may not want in there. 

But no, this doesn't make me happy because you insist on munging multiple 
patches together that have little to do with each other, besides the fact 
they touch the same file. Like I said in private email, it really helps to 
track down a problem if each patch and subsequent changeset is as small 
and localized as possible. 

And, that's a real problem with swsusp. It's a huge mess right now. I'd 
like to see it work well and reliably for 2.6, and have the source code be 
in a state where people can look at it without running away screaming. 
Convoluted updates are not going to help the situation. 


	-pat

Re: swsusp updates

[Pavel Machek]

Hi!

> > Okay, I killed few trivial hunks, will submit them through trivial
> > patch monkey. Are you happy now, patrick?
> 
> Why do you insist on abusing the trivial patch monkey? Why can't you send 
> them directly to the maintainers? For instance, you add/remove printk()s 
> and comments that other people may or may not want in there. 

If killing an noisy printk is not an trivial patch, I do not know what
else is. If you want me to keep some printks, tell me, and we can talk
about that.

> But no, this doesn't make me happy because you insist on munging multiple 
> patches together that have little to do with each other, besides the fact 
> they touch the same file. Like I said in private email, it really helps to 
> track down a problem if each patch and subsequent changeset is as small 
> and localized as possible. 

> And, that's a real problem with swsusp. It's a huge mess right now. I'd 
> like to see it work well and reliably for 2.6, and have the source code be 
> in a state where people can look at it without running away screaming. 
> Convoluted updates are not going to help the situation. 

Yes, and just now you are contributing for swsusp to stay in the messy
state. Thanx a lot.

If you want to become swsusp maintainer, say so, and you'll be fed
nice and split patches *once*. That's okay to do. But I'm not able/do
not have enough time to produce split patch each time Linus decides to
drop the mail into the bitbucket.

I really don't like "Linus dropped patch -> resubmit 2 patches merged"
resulting in you screaming "SPLIT IT UP!" on the lists.
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]

Re: swsusp updates

[Pavel Machek]

Hi!

> > Okay, I killed few trivial hunks, will submit them through trivial
> > patch monkey. Are you happy now, patrick?
> 
> Why do you insist on abusing the trivial patch monkey? Why can't you send 
> them directly to the maintainers? For instance, you add/remove printk()s 
> and comments that other people may or may not want in there. 
> 
> But no, this doesn't make me happy because you insist on munging multiple 
> patches together that have little to do with each other, besides the fact 
> they touch the same file. Like I said in private email, it really helps to 
> track down a problem if each patch and subsequent changeset is as small 
> and localized as possible. 
> 
> And, that's a real problem with swsusp. It's a huge mess right now. I'd 
> like to see it work well and reliably for 2.6, and have the source code be 
> in a state where people can look at it without running away screaming. 
> Convoluted updates are not going to help the situation. 

[Sorry for the mess, I guess we are on the good way to solve this in
private mails.]
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]

"linux-power" tree [was Re: swsusp updates]

[Pavel Machek]

Hi!

> And, that's a real problem with swsusp. It's a huge mess right now. I'd 
> like to see it work well and reliably for 2.6, and have the source code be 
> in a state where people can look at it without running away screaming. 
> Convoluted updates are not going to help the situation. 

Okay, so the debate is not over. It looks like his internet connection
only works as long as you keep flaming him -- perhaps he has frozen
ethernet cable? :-)

Anyway, patrick seems to have his own "linux-power" tree, and thinks
that his "linux-power" tree will help powermanagment in Linux. I don't
think that is the case, but I'll provide split patches *once*. Then
I'm going to post each new patch (I guess I'll cc: patrick), but
cumulate them for submission to Linus. Patches will be marked [PM]
(read it as Pavel Machek or Power Managment).

I hope that works for everybody.
								Pavel
-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]