Messages in this thread Patch in this message | | | Date | Sat, 30 Nov 2002 14:26:42 +0100 | From | Pavel Machek <> | Subject | swsusp for 2.5.50 |
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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", -- Worst form of spam? 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