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Subject[PATCH 7/7] Hibernation: Update messages
Date
From: Rafael J. Wysocki <rjw@sisk.pl>

Make hibernation messages start with one common prefix "PM: " and use
the word "hibernation" in messages as a synonym of "suspend to disk".

Turn some KERN_INFO messages into debug ones.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
kernel/power/disk.c | 28 +++++++++++++++-------------
kernel/power/snapshot.c | 23 ++++++++++++-----------
kernel/power/swap.c | 31 +++++++++++++++++--------------
kernel/power/swsusp.c | 5 +++--
4 files changed, 47 insertions(+), 40 deletions(-)
Index: linux-2.6/kernel/power/disk.c
===================================================================
--- linux-2.6.orig/kernel/power/disk.c
+++ linux-2.6/kernel/power/disk.c
@@ -191,8 +191,8 @@ int create_image(int platform_mode)
*/
error = device_power_down(PMSG_FREEZE);
if (error) {
- printk(KERN_ERR "Some devices failed to power down, "
- KERN_ERR "aborting suspend\n");
+ printk(KERN_ERR "PM: Some devices failed to power down, "
+ "aborting hibernation\n");
goto Enable_irqs;
}

@@ -203,7 +203,8 @@ int create_image(int platform_mode)
save_processor_state();
error = swsusp_arch_suspend();
if (error)
- printk(KERN_ERR "Error %d while creating the image\n", error);
+ printk(KERN_ERR "PM: Error %d creating hibernation image\n",
+ error);
/* Restore control flow magically appears here */
restore_processor_state();
if (!in_suspend)
@@ -289,7 +290,7 @@ static int resume_target_kernel(void)
local_irq_disable();
error = device_power_down(PMSG_PRETHAW);
if (error) {
- printk(KERN_ERR "Some devices failed to power down, "
+ printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
goto Enable_irqs;
}
@@ -438,7 +439,7 @@ static void power_down(void)
* Valid image is on the disk, if we continue we risk serious data
* corruption after resume.
*/
- printk(KERN_CRIT "Please power me down manually\n");
+ printk(KERN_CRIT "PM: Please power down manually\n");
while(1);
}

@@ -484,7 +485,7 @@ int hibernate(void)
if (error)
goto Exit;

- printk("Syncing filesystems ... ");
+ printk(KERN_INFO "PM: Syncing filesystems ... ");
sys_sync();
printk("done.\n");

@@ -560,10 +561,11 @@ static int software_resume(void)
return -ENOENT;
}
swsusp_resume_device = name_to_dev_t(resume_file);
- pr_debug("swsusp: Resume From Partition %s\n", resume_file);
+ pr_debug("PM: Resume from partition %s\n", resume_file);
} else {
- pr_debug("swsusp: Resume From Partition %d:%d\n",
- MAJOR(swsusp_resume_device), MINOR(swsusp_resume_device));
+ pr_debug("PM: Resume from partition %d:%d\n",
+ MAJOR(swsusp_resume_device),
+ MINOR(swsusp_resume_device));
}

if (noresume) {
@@ -575,7 +577,7 @@ static int software_resume(void)
return 0;
}

- pr_debug("PM: Checking swsusp image.\n");
+ pr_debug("PM: Checking hibernation image.\n");
error = swsusp_check();
if (error)
goto Unlock;
@@ -601,7 +603,7 @@ static int software_resume(void)
goto Done;
}

- pr_debug("PM: Reading swsusp image.\n");
+ pr_debug("PM: Reading hibernation image.\n");

error = swsusp_read(&flags);
if (!error)
@@ -726,7 +728,7 @@ static ssize_t disk_store(struct kset *k
error = -EINVAL;

if (!error)
- pr_debug("PM: suspend-to-disk mode set to '%s'\n",
+ pr_debug("PM: Hibernation mode set to '%s'\n",
hibernation_modes[mode]);
mutex_unlock(&pm_mutex);
return error ? error : n;
@@ -756,7 +758,7 @@ static ssize_t resume_store(struct kset
mutex_lock(&pm_mutex);
swsusp_resume_device = res;
mutex_unlock(&pm_mutex);
- printk("Attempting manual resume\n");
+ printk(KERN_INFO "PM: Starting manual resume from disk\n");
noresume = 0;
software_resume();
ret = n;
Index: linux-2.6/kernel/power/snapshot.c
===================================================================
--- linux-2.6.orig/kernel/power/snapshot.c
+++ linux-2.6/kernel/power/snapshot.c
@@ -635,7 +635,7 @@ __register_nosave_region(unsigned long s
region->end_pfn = end_pfn;
list_add_tail(&region->list, &nosave_regions);
Report:
- printk("swsusp: Registered nosave memory region: %016lx - %016lx\n",
+ printk(KERN_INFO "PM: Registered nosave memory: %016lx - %016lx\n",
start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT);
}

@@ -704,7 +704,7 @@ static void mark_nosave_pages(struct mem
list_for_each_entry(region, &nosave_regions, list) {
unsigned long pfn;

- printk("swsusp: Marking nosave pages: %016lx - %016lx\n",
+ pr_debug("PM: Marking nosave pages: %016lx - %016lx\n",
region->start_pfn << PAGE_SHIFT,
region->end_pfn << PAGE_SHIFT);

@@ -749,7 +749,7 @@ int create_basic_memory_bitmaps(void)
free_pages_map = bm2;
mark_nosave_pages(forbidden_pages_map);

- printk("swsusp: Basic memory bitmaps created\n");
+ pr_debug("PM: Basic memory bitmaps created\n");

return 0;

@@ -784,7 +784,7 @@ void free_basic_memory_bitmaps(void)
memory_bm_free(bm2, PG_UNSAFE_CLEAR);
kfree(bm2);

- printk("swsusp: Basic memory bitmaps freed\n");
+ pr_debug("PM: Basic memory bitmaps freed\n");
}

/**
@@ -1088,7 +1088,7 @@ static int enough_free_mem(unsigned int
}

nr_pages += count_pages_for_highmem(nr_highmem);
- pr_debug("swsusp: Normal pages needed: %u + %u + %u, available pages: %u\n",
+ pr_debug("PM: Normal pages needed: %u + %u + %u, available pages: %u\n",
nr_pages, PAGES_FOR_IO, meta, free);

return free > nr_pages + PAGES_FOR_IO + meta;
@@ -1201,20 +1201,20 @@ asmlinkage int swsusp_save(void)
{
unsigned int nr_pages, nr_highmem;

- printk("swsusp: critical section: \n");
+ printk(KERN_INFO "PM: Creating hibernation image: \n");

drain_local_pages();
nr_pages = count_data_pages();
nr_highmem = count_highmem_pages();
- printk("swsusp: Need to copy %u pages\n", nr_pages + nr_highmem);
+ printk(KERN_INFO "PM: Need to copy %u pages\n", nr_pages + nr_highmem);

if (!enough_free_mem(nr_pages, nr_highmem)) {
- printk(KERN_ERR "swsusp: Not enough free memory\n");
+ printk(KERN_ERR "PM: Not enough free memory\n");
return -ENOMEM;
}

if (swsusp_alloc(&orig_bm, &copy_bm, nr_pages, nr_highmem)) {
- printk(KERN_ERR "swsusp: Memory allocation failed\n");
+ printk(KERN_ERR "PM: Memory allocation failed\n");
return -ENOMEM;
}

@@ -1234,7 +1234,8 @@ asmlinkage int swsusp_save(void)
nr_copy_pages = nr_pages;
nr_meta_pages = DIV_ROUND_UP(nr_pages * sizeof(long), PAGE_SIZE);

- printk("swsusp: critical section: done (%d pages copied)\n", nr_pages);
+ printk(KERN_INFO "PM: Hibernation image created (%d pages copied)\n",
+ nr_pages);

return 0;
}
@@ -1433,7 +1434,7 @@ static int check_header(struct swsusp_in
if (!reason && info->num_physpages != num_physpages)
reason = "memory size";
if (reason) {
- printk(KERN_ERR "swsusp: Resume mismatch: %s\n", reason);
+ printk(KERN_ERR "PM: Image mismatch: %s\n", reason);
return -EPERM;
}
return 0;
Index: linux-2.6/kernel/power/swap.c
===================================================================
--- linux-2.6.orig/kernel/power/swap.c
+++ linux-2.6/kernel/power/swap.c
@@ -71,7 +71,8 @@ static int submit(int rw, pgoff_t page_o
bio->bi_end_io = end_swap_bio_read;

if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
- printk("swsusp: ERROR: adding page to bio at %ld\n", page_off);
+ printk(KERN_ERR "PM: Adding page to bio failed at %ld\n",
+ page_off);
bio_put(bio);
return -EFAULT;
}
@@ -151,7 +152,7 @@ static int mark_swapfiles(sector_t start
error = bio_write_page(swsusp_resume_block,
swsusp_header, NULL);
} else {
- printk(KERN_ERR "swsusp: Swap header not found!\n");
+ printk(KERN_ERR "PM: Swap header not found!\n");
error = -ENODEV;
}
return error;
@@ -323,7 +324,8 @@ static int save_image(struct swap_map_ha
struct timeval start;
struct timeval stop;

- printk("Saving image data pages (%u pages) ... ", nr_to_write);
+ printk(KERN_INFO "PM: Saving image data pages (%u pages) ... ",
+ nr_to_write);
m = nr_to_write / 100;
if (!m)
m = 1;
@@ -363,7 +365,7 @@ static int enough_swap(unsigned int nr_p
{
unsigned int free_swap = count_swap_pages(root_swap, 1);

- pr_debug("swsusp: free swap pages: %u\n", free_swap);
+ pr_debug("PM: Free swap pages: %u\n", free_swap);
return free_swap > nr_pages + PAGES_FOR_IO;
}

@@ -386,7 +388,7 @@ int swsusp_write(unsigned int flags)

error = swsusp_swap_check();
if (error) {
- printk(KERN_ERR "swsusp: Cannot find swap device, try "
+ printk(KERN_ERR "PM: Cannot find swap device, try "
"swapon -a.\n");
return error;
}
@@ -400,7 +402,7 @@ int swsusp_write(unsigned int flags)
}
header = (struct swsusp_info *)data_of(snapshot);
if (!enough_swap(header->pages)) {
- printk(KERN_ERR "swsusp: Not enough free swap\n");
+ printk(KERN_ERR "PM: Not enough free swap\n");
error = -ENOSPC;
goto out;
}
@@ -415,7 +417,7 @@ int swsusp_write(unsigned int flags)

if (!error) {
flush_swap_writer(&handle);
- printk("S");
+ printk(KERN_INFO "PM: S");
error = mark_swapfiles(start, flags);
printk("|\n");
}
@@ -505,7 +507,8 @@ static int load_image(struct swap_map_ha
int err2;
unsigned nr_pages;

- printk("Loading image data pages (%u pages) ... ", nr_to_read);
+ printk(KERN_INFO "PM: Loading image data pages (%u pages) ... ",
+ nr_to_read);
m = nr_to_read / 100;
if (!m)
m = 1;
@@ -556,7 +559,7 @@ int swsusp_read(unsigned int *flags_p)

*flags_p = swsusp_header->flags;
if (IS_ERR(resume_bdev)) {
- pr_debug("swsusp: block device not initialised\n");
+ pr_debug("PM: Image device not initialised\n");
return PTR_ERR(resume_bdev);
}

@@ -575,9 +578,9 @@ int swsusp_read(unsigned int *flags_p)
blkdev_put(resume_bdev);

if (!error)
- pr_debug("swsusp: Reading resume file was successful\n");
+ pr_debug("PM: Image successfully loaded\n");
else
- pr_debug("swsusp: Error %d resuming\n", error);
+ pr_debug("PM: Error %d resuming\n", error);
return error;
}

@@ -609,13 +612,13 @@ int swsusp_check(void)
if (error)
blkdev_put(resume_bdev);
else
- pr_debug("swsusp: Signature found, resuming\n");
+ pr_debug("PM: Signature found, resuming\n");
} else {
error = PTR_ERR(resume_bdev);
}

if (error)
- pr_debug("swsusp: Error %d check for resume file\n", error);
+ pr_debug("PM: Error %d checking image file\n", error);

return error;
}
@@ -627,7 +630,7 @@ int swsusp_check(void)
void swsusp_close(void)
{
if (IS_ERR(resume_bdev)) {
- pr_debug("swsusp: block device not initialised\n");
+ pr_debug("PM: Image device not initialised\n");
return;
}

Index: linux-2.6/kernel/power/swsusp.c
===================================================================
--- linux-2.6.orig/kernel/power/swsusp.c
+++ linux-2.6/kernel/power/swsusp.c
@@ -188,7 +188,8 @@ void swsusp_show_speed(struct timeval *s
centisecs = 1; /* avoid div-by-zero */
k = nr_pages * (PAGE_SIZE / 1024);
kps = (k * 100) / centisecs;
- printk("%s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n", msg, k,
+ printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
+ msg, k,
centisecs / 100, centisecs % 100,
kps / 1000, (kps % 1000) / 10);
}
@@ -219,7 +220,7 @@ int swsusp_shrink_memory(void)
char *p = "-\\|/";
struct timeval start, stop;

- printk("Shrinking memory... ");
+ printk(KERN_INFO "PM: Shrinking memory... ");
do_gettimeofday(&start);
do {
long size, highmem_size;
-
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