Hi!
This uses new memory-freeing code from Andrew Morton (thanx!), cleans
sources a bit and makes suspend possible with md enabled, drivers are
no longer resumed from atomic context.
Please apply,
Pavel
--- clean/arch/i386/kernel/suspend.c 2002-11-01 00:37:05.000000000 +0100
+++ linux-swsusp/arch/i386/kernel/suspend.c 2002-10-13 20:19:43.000000000 +0200
@@ -175,7 +175,6 @@
* the flags
*/
asm volatile ("pushl %0 ; popfl" :: "m" (saved_context.eflags));
-
do_fpu_end();
}
--- clean/drivers/md/md.c 2002-11-01 00:37:17.000000000 +0100
+++ linux-swsusp/drivers/md/md.c 2002-11-01 00:44:22.000000000 +0100
@@ -37,6 +37,7 @@
#include <linux/raid/xor.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/buffer_head.h> /* for invalidate_bdev */
+#include <linux/suspend.h>
#include <linux/init.h>
@@ -2463,6 +2464,8 @@
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 2002-11-01 00:37:42.000000000 +0100
+++ linux-swsusp/kernel/suspend.c 2002-11-02 19:28:02.000000000 +0100
@@ -145,10 +145,10 @@
/*
* Debug
*/
#undef 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;
}
@@ -489,7 +490,6 @@
if (PageNosave(page))
continue;
-
if ((chunk_size=is_head_of_free_region(page))!=0) {
pfn += chunk_size - 1;
continue;
@@ -549,7 +549,7 @@
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 +558,12 @@
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 +624,7 @@
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 +677,7 @@
}
}
-static int suspend_save_image(void)
+static int suspend_prepare_image(void)
{
struct sysinfo i;
unsigned int nr_needed_pages = 0;
@@ -725,9 +726,15 @@
*
* 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;
+}
+
+void suspend_save_image(void)
+{
+ drivers_unsuspend();
lock_swapdevices();
write_suspend_image();
@@ -738,7 +745,6 @@
* 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)
@@ -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 :-) */
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This archive was generated by hypermail 2b29 : Thu Nov 07 2002 - 22:00:26 EST