static int suspend_prepare_image(void)
{
int error;
pr_debug("swsusp: critical section: \n");
if (save_highmem()) {
printk(KERN_CRIT "Suspend machine: Not enough free pages for highmem\n");
restore_highmem();
return -ENOMEM;
}
drain_local_pages();
count_data_pages();
printk("swsusp: Need to copy %u pages\n",nr_copy_pages);
error = swsusp_alloc();
if (error)
return error;
/* During allocating of suspend pagedir, new cold pages may appear.
* Kill them.
*/
drain_local_pages();
copy_data_pages();
/*
* End of critical section. From now on, we can write to memory,
* but we should not touch disk. This specially means we must _not_
* touch swap space! Except we must write out our image of course.
*/
printk("swsusp: critical section/: done (%d pages copied)\n", nr_copy_pages );
return 0;
}
int pmdisk_suspend(void)
{
int error = 0;
if ((error = read_swapfiles()))
return error;
drain_local_pages();
pm_pagedir_nosave = NULL;
pr_debug("pmdisk: Counting pages to copy.\n" );
count_pages();
pr_debug("pmdisk: (pages needed: %d + %d free: %d)\n",
pmdisk_pages,PAGES_FOR_IO,nr_free_pages());
if (!enough_free_mem())
return -ENOMEM;
if (!enough_swap())
return -ENOSPC;
if ((error = alloc_pagedir())) {
pr_debug("pmdisk: Allocating pagedir failed.\n");
return error;
}
if ((error = alloc_image_pages())) {
pr_debug("pmdisk: Allocating image pages failed.\n");
free_pagedir();
return error;
}
nr_copy_pages_check = pmdisk_pages;
pagedir_order_check = pagedir_order;
/* During allocating of suspend pagedir, new cold pages may appear.
* Kill them
*/
drain_local_pages();
/* copy */
copy_pages();
/*
* End of critical section. From now on, we can write to memory,
* but we should not touch disk. This specially means we must _not_
* touch swap space! Except we must write out our image of course.
*/
pr_debug("pmdisk: %d pages copied\n", pmdisk_pages );
return 0;
}
static int suspend_prepare_image(void)
{
struct sysinfo i;
unsigned int nr_needed_pages = 0;
drain_local_pages();
pagedir_nosave = NULL;
printk( "/critical section: Counting pages to copy" );
nr_copy_pages = count_and_copy_data_pages(NULL);
nr_needed_pages = nr_copy_pages + PAGES_FOR_IO;
printk(" (pages needed: %d+%d=%d free: %d)\n",nr_copy_pages,PAGES_FOR_IO,nr_needed_pages,nr_free_pages());
if(nr_free_pages() < nr_needed_pages) {
printk(KERN_CRIT "%sCouldn't get enough free pages, on %d pages short\n",
name_suspend, nr_needed_pages-nr_free_pages());
root_swap = 0xFFFF;
return 1;
}
si_swapinfo(&i); /* FIXME: si_swapinfo(&i) returns all swap devices information.
We should only consider resume_device. */
if (i.freeswap < nr_needed_pages) {
printk(KERN_CRIT "%sThere's not enough swap space available, on %ld pages short\n",
name_suspend, nr_needed_pages-i.freeswap);
return 1;
}
PRINTK( "Alloc pagedir\n" );
pagedir_save = pagedir_nosave = create_suspend_pagedir(nr_copy_pages);
if(!pagedir_nosave) {
/* Shouldn't happen */
printk(KERN_CRIT "%sCouldn't allocate enough pages\n",name_suspend);
panic("Really should not happen");
return 1;
}
nr_copy_pages_check = nr_copy_pages;
pagedir_order_check = pagedir_order;
drain_local_pages(); /* During allocating of suspend pagedir, new cold pages may appear. Kill them */
if (nr_copy_pages != count_and_copy_data_pages(pagedir_nosave)) /* copy */
BUG();
/*
* End of critical section. From now on, we can write to memory,
* but we should not touch disk. This specially means we must _not_
* touch swap space! Except we must write out our image of course.
*/
printk( "critical section/: done (%d pages copied)\n", nr_copy_pages );
return 0;
}
asmlinkage int swsusp_save(void)
{
unsigned int nr_pages;
pr_debug("swsusp: critical section: \n");
drain_local_pages();
nr_pages = count_data_pages();
printk("swsusp: Need to copy %u pages\n", nr_pages);
if (!enough_free_mem(nr_pages)) {
printk(KERN_ERR "swsusp: Not enough free memory\n");
return -ENOMEM;
}
if (swsusp_alloc(&orig_bm, ©_bm, nr_pages))
return -ENOMEM;
/* During allocating of suspend pagedir, new cold pages may appear.
* Kill them.
*/
drain_local_pages();
copy_data_pages(©_bm, &orig_bm);
/*
* End of critical section. From now on, we can write to memory,
* but we should not touch disk. This specially means we must _not_
* touch swap space! Except we must write out our image of course.
*/
nr_copy_pages = nr_pages;
nr_meta_pages = (nr_pages * sizeof(long) + PAGE_SIZE - 1) >> PAGE_SHIFT;
printk("swsusp: critical section/: done (%d pages copied)\n", nr_pages);
return 0;
}
int save_highmem(void)
{
struct zone *zone;
int res = 0;
pr_debug("swsusp: Saving Highmem");
drain_local_pages();
for_each_zone (zone) {
if (is_highmem(zone))
res = save_highmem_zone(zone);
if (res)
return res;
}
printk("\n");
return 0;
}
