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swsusp for 2.5.50
Hi!
This adds support for 64-bit machines, moves config option where it
belongs and fixes compile problems, adds minimal support for md, and
cleans stuff up. Please apply,
Pavel
--- clean/arch/i386/Kconfig 2002-11-29 21:16:30.000000000 +0100
+++ linux-swsusp/arch/i386/Kconfig 2002-11-29 21:29:34.000000000 +0100
@@ -789,8 +789,6 @@
menu "Power management options (ACPI, APM)"
-source "drivers/acpi/Kconfig"
-
config PM
bool "Power Management support"
---help---
@@ -811,6 +809,37 @@
will issue the hlt instruction if nothing is to be done, thereby
sending the processor to sleep and saving power.
+config SOFTWARE_SUSPEND
+ bool "Software Suspend (EXPERIMENTAL)"
+ depends on EXPERIMENTAL && PM
+ ---help---
+ Enable the possibilty of suspendig machine. It doesn't need APM.
+ You may suspend your machine by 'swsusp' or 'shutdown -z <time>'
+ (patch for sysvinit needed).
+
+ It creates an image which is saved in your active swaps. By the next
+ booting the, pass 'resume=/path/to/your/swap/file' and kernel will
+ detect the saved image, restore the memory from
+ it and then it continues to run as before you've suspended.
+ If you don't want the previous state to continue use the 'noresume'
+ kernel option. However note that your partitions will be fsck'd and
+ you must re-mkswap your swap partitions/files.
+
+ Right now you may boot without resuming and then later resume but
+ in meantime you cannot use those swap partitions/files which were
+ involved in suspending. Also in this case there is a risk that buffers
+ on disk won't match with saved ones.
+
+ SMP is supported ``as-is''. There's a code for it but doesn't work.
+ There have been problems reported relating SCSI.
+
+ This option is about getting stable. However there is still some
+ absence of features.
+
+ For more information take a look at Documentation/swsusp.txt.
+
+source "drivers/acpi/Kconfig"
+
config APM
tristate "Advanced Power Management BIOS support"
depends on PM
@@ -1516,35 +1545,6 @@
menu "Kernel hacking"
-config SOFTWARE_SUSPEND
- bool "Software Suspend (EXPERIMENTAL)"
- depends on EXPERIMENTAL && PM
- ---help---
- Enable the possibilty of suspendig machine. It doesn't need APM.
- You may suspend your machine by 'swsusp' or 'shutdown -z <time>'
- (patch for sysvinit needed).
-
- It creates an image which is saved in your active swaps. By the next
- booting the, pass 'resume=/path/to/your/swap/file' and kernel will
- detect the saved image, restore the memory from
- it and then it continues to run as before you've suspended.
- If you don't want the previous state to continue use the 'noresume'
- kernel option. However note that your partitions will be fsck'd and
- you must re-mkswap your swap partitions/files.
-
- Right now you may boot without resuming and then later resume but
- in meantime you cannot use those swap partitions/files which were
- involved in suspending. Also in this case there is a risk that buffers
- on disk won't match with saved ones.
-
- SMP is supported ``as-is''. There's a code for it but doesn't work.
- There have been problems reported relating SCSI.
-
- This option is about getting stable. However there is still some
- absence of features.
-
- For more information take a look at Documentation/swsusp.txt.
-
config DEBUG_KERNEL
bool "Kernel debugging"
help
--- clean/drivers/acpi/Kconfig 2002-11-01 00:37:09.000000000 +0100
+++ linux-swsusp/drivers/acpi/Kconfig 2002-11-23 21:16:32.000000000 +0100
@@ -58,8 +58,7 @@
config ACPI_SLEEP
bool "Sleep States"
- depends on X86 && ACPI && !ACPI_HT_ONLY
- default SOFTWARE_SUSPEND
+ depends on X86 && ACPI && !ACPI_HT_ONLY && SOFTWARE_SUSPEND
---help---
This option adds support for ACPI suspend states.
--- clean/drivers/md/md.c 2002-11-23 19:55:20.000000000 +0100
+++ linux-swsusp/drivers/md/md.c 2002-11-23 19:57:55.000000000 +0100
@@ -36,6 +36,7 @@
#include <linux/bio.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/buffer_head.h> /* for invalidate_bdev */
+#include <linux/suspend.h>
#include <linux/init.h>
@@ -2466,6 +2467,8 @@
wait_event_interruptible(thread->wqueue,
test_bit(THREAD_WAKEUP, &thread->flags));
+ if (current->flags & PF_FREEZE)
+ refrigerator(PF_IOTHREAD);
clear_bit(THREAD_WAKEUP, &thread->flags);
--- clean/kernel/suspend.c 2002-11-19 16:46:15.000000000 +0100
+++ linux-swsusp/kernel/suspend.c 2002-11-19 15:38:28.000000000 +0100
@@ -80,9 +80,9 @@
#endif
#define TIMEOUT (6 * HZ) /* Timeout for stopping processes */
-#define ADDRESS(x) ((unsigned long) phys_to_virt(((x) << PAGE_SHIFT)))
-
-extern int C_A_D;
+#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 */
/* References to section boundaries */
extern char _text, _etext, _edata, __bss_start, _end;
@@ -145,10 +145,10 @@
/*
* Debug
*/
-#undef DEBUG_DEFAULT
+#define DEBUG_DEFAULT
#undef DEBUG_PROCESS
#undef DEBUG_SLOW
-#define TEST_SWSUSP 1 /* 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)
@@ -235,6 +235,7 @@
} while(todo);
printk( "|\n" );
+ BUG_ON(in_atomic());
return 0;
}
@@ -322,20 +323,20 @@
rw_swap_page_sync(READ, entry, page);
if (mode == MARK_SWAP_RESUME) {
- if (!memcmp("SUSP1R",cur->swh.magic.magic,6))
+ if (!memcmp("S1",cur->swh.magic.magic,2))
memcpy(cur->swh.magic.magic,"SWAP-SPACE",10);
- else if (!memcmp("SUSP2R",cur->swh.magic.magic,6))
+ else if (!memcmp("S2",cur->swh.magic.magic,2))
memcpy(cur->swh.magic.magic,"SWAPSPACE2",10);
else printk("%sUnable to find suspended-data signature (%.10s - misspelled?\n",
name_resume, cur->swh.magic.magic);
} else {
if ((!memcmp("SWAP-SPACE",cur->swh.magic.magic,10)))
- memcpy(cur->swh.magic.magic,"SUSP1R....",10);
+ memcpy(cur->swh.magic.magic,"S1SUSP....",10);
else if ((!memcmp("SWAPSPACE2",cur->swh.magic.magic,10)))
- memcpy(cur->swh.magic.magic,"SUSP2R....",10);
+ memcpy(cur->swh.magic.magic,"S2SUSP....",10);
else panic("\nSwapspace is not swapspace (%.10s)\n", cur->swh.magic.magic);
cur->link.next = prev; /* prev is the first/last swap page of the resume area */
- /* link.next lies *no more* in last 4 bytes of magic */
+ /* link.next lies *no more* in last 4/8 bytes of magic */
}
rw_swap_page_sync(WRITE, entry, page);
__free_page(page);
@@ -489,7 +490,6 @@
if (PageNosave(page))
continue;
-
if ((chunk_size=is_head_of_free_region(page))!=0) {
pfn += chunk_size - 1;
continue;
@@ -500,10 +500,9 @@
/*
* Just copy whole code segment. Hopefully it is not that big.
*/
- if (ADDRESS(pfn) >= (unsigned long)
- &__nosave_begin && ADDRESS(pfn) <
- (unsigned long)&__nosave_end) {
- PRINTK("[nosave %x]", ADDRESS(pfn));
+ if ((ADDRESS(pfn) >= (unsigned long) ADDRESS2(&__nosave_begin)) &&
+ (ADDRESS(pfn) < (unsigned long) ADDRESS2(&__nosave_end))) {
+ PRINTK("[nosave %lx]", ADDRESS(pfn));
continue;
}
/* Hmm, perhaps copying all reserved pages is not too healthy as they may contain
@@ -513,7 +512,7 @@
nr_copy_pages++;
if (pagedir_p) {
pagedir_p->orig_address = ADDRESS(pfn);
- copy_page(pagedir_p->address, pagedir_p->orig_address);
+ copy_page((void *) pagedir_p->address, (void *) pagedir_p->orig_address);
pagedir_p++;
}
}
@@ -549,7 +548,7 @@
pagedir_order = get_bitmask_order(SUSPEND_PD_PAGES(nr_copy_pages));
- p = pagedir = (suspend_pagedir_t *)__get_free_pages(GFP_ATOMIC, pagedir_order);
+ p = pagedir = (suspend_pagedir_t *)__get_free_pages(GFP_ATOMIC | __GFP_COLD, pagedir_order);
if(!pagedir)
return NULL;
@@ -558,11 +557,12 @@
SetPageNosave(page++);
while(nr_copy_pages--) {
- p->address = get_zeroed_page(GFP_ATOMIC);
+ p->address = get_zeroed_page(GFP_ATOMIC | __GFP_COLD);
if(!p->address) {
free_suspend_pagedir((unsigned long) pagedir);
return NULL;
}
+ printk(".");
SetPageNosave(virt_to_page(p->address));
p->orig_address = 0;
p++;
@@ -623,7 +623,7 @@
static void free_some_memory(void)
{
printk("Freeing memory: ");
- while (try_to_free_pages(&contig_page_data.node_zones[ZONE_HIGHMEM], GFP_KSWAPD, 0))
+ while (shrink_all_memory(10000))
printk(".");
printk("|\n");
}
@@ -676,7 +676,7 @@
}
}
-static int suspend_save_image(void)
+static int suspend_prepare_image(void)
{
struct sysinfo i;
unsigned int nr_needed_pages = 0;
@@ -725,9 +725,15 @@
*
* Following line enforces not writing to disk until we choose.
*/
- drivers_unsuspend();
- spin_unlock_irq(&suspend_pagedir_lock);
+
printk( "critical section/: done (%d pages copied)\n", nr_copy_pages );
+ spin_unlock_irq(&suspend_pagedir_lock);
+ return 0;
+}
+
+static void suspend_save_image(void)
+{
+ drivers_unsuspend();
lock_swapdevices();
write_suspend_image();
@@ -738,11 +744,11 @@
* filesystem clean: it is not. (And it does not matter, if we resume
* correctly, we'll mark system clean, anyway.)
*/
- return 0;
}
-void suspend_power_down(void)
+static void suspend_power_down(void)
{
+ extern int C_A_D;
C_A_D = 0;
printk(KERN_EMERG "%s%s Trying to power down.\n", name_suspend, TEST_SWSUSP ? "Disable TEST_SWSUSP. NOT ": "");
#ifdef CONFIG_VT
@@ -788,8 +794,8 @@
PRINTK( "Freeing prev allocated pagedir\n" );
free_suspend_pagedir((unsigned long) pagedir_save);
- drivers_resume(RESUME_ALL_PHASES);
spin_unlock_irq(&suspend_pagedir_lock);
+ drivers_resume(RESUME_ALL_PHASES);
PRINTK( "Fixing swap signatures... " );
mark_swapfiles(((swp_entry_t) {0}), MARK_SWAP_RESUME);
@@ -804,14 +810,17 @@
{
mb();
barrier();
+ BUG_ON(in_atomic());
spin_lock_irq(&suspend_pagedir_lock);
}
void do_magic_suspend_2(void)
{
read_swapfiles();
- if (!suspend_save_image())
+ if (!suspend_prepare_image()) { /* suspend_save_image realeses suspend_pagedir_lock */
+ suspend_save_image();
suspend_power_down(); /* FIXME: if suspend_power_down is commented out, console is lost after few suspends ?! */
+ }
printk(KERN_EMERG "%sSuspend failed, trying to recover...\n", name_suspend);
MDELAY(1000); /* So user can wait and report us messages if armageddon comes :-) */
@@ -827,7 +836,7 @@
PRINTK(KERN_WARNING "%sLeaving do_magic_suspend_2...\n", name_suspend);
}
-void do_software_suspend(void)
+static void do_software_suspend(void)
{
arch_prepare_suspend();
if (prepare_suspend_console())
@@ -1069,9 +1078,9 @@
PREPARENEXT; /* We have to read next position before we overwrite it */
- if (!memcmp("SUSP1R",cur->swh.magic.magic,6))
+ if (!memcmp("S1",cur->swh.magic.magic,2))
memcpy(cur->swh.magic.magic,"SWAP-SPACE",10);
- else if (!memcmp("SUSP2R",cur->swh.magic.magic,6))
+ else if (!memcmp("S2",cur->swh.magic.magic,2))
memcpy(cur->swh.magic.magic,"SWAPSPACE2",10);
else {
panic("%sUnable to find suspended-data signature (%.10s - misspelled?\n",
--
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