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-rw-r--r--kernel/power/Makefile2
-rw-r--r--kernel/power/hibernate.c41
-rw-r--r--kernel/power/main.c1
-rw-r--r--kernel/power/process.c14
-rw-r--r--kernel/power/suspend_test.c5
-rw-r--r--kernel/power/swap.c146
-rw-r--r--kernel/power/swsusp.c130
7 files changed, 177 insertions, 162 deletions
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c3b81c30e5d..43191815f87 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_PM_SLEEP) += console.o
obj-$(CONFIG_FREEZER) += process.o
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o
-obj-$(CONFIG_HIBERNATION) += swsusp.o hibernate.o snapshot.o swap.o user.o
+obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o
obj-$(CONFIG_HIBERNATION_NVS) += hibernate_nvs.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 04b3a83d686..bbfe472d752 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -32,6 +32,7 @@ static int noresume = 0;
static char resume_file[256] = CONFIG_PM_STD_PARTITION;
dev_t swsusp_resume_device;
sector_t swsusp_resume_block;
+int in_suspend __nosavedata = 0;
enum {
HIBERNATION_INVALID,
@@ -202,6 +203,35 @@ static void platform_recover(int platform_mode)
}
/**
+ * swsusp_show_speed - print the time elapsed between two events.
+ * @start: Starting event.
+ * @stop: Final event.
+ * @nr_pages - number of pages processed between @start and @stop
+ * @msg - introductory message to print
+ */
+
+void swsusp_show_speed(struct timeval *start, struct timeval *stop,
+ unsigned nr_pages, char *msg)
+{
+ s64 elapsed_centisecs64;
+ int centisecs;
+ int k;
+ int kps;
+
+ elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
+ do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
+ centisecs = elapsed_centisecs64;
+ if (centisecs == 0)
+ centisecs = 1; /* avoid div-by-zero */
+ k = nr_pages * (PAGE_SIZE / 1024);
+ kps = (k * 100) / centisecs;
+ 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);
+}
+
+/**
* create_image - freeze devices that need to be frozen with interrupts
* off, create the hibernation image and thaw those devices. Control
* reappears in this routine after a restore.
@@ -693,21 +723,22 @@ static int software_resume(void)
/* The snapshot device should not be opened while we're running */
if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
error = -EBUSY;
+ swsusp_close(FMODE_READ);
goto Unlock;
}
pm_prepare_console();
error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
if (error)
- goto Finish;
+ goto close_finish;
error = usermodehelper_disable();
if (error)
- goto Finish;
+ goto close_finish;
error = create_basic_memory_bitmaps();
if (error)
- goto Finish;
+ goto close_finish;
pr_debug("PM: Preparing processes for restore.\n");
error = prepare_processes();
@@ -719,6 +750,7 @@ static int software_resume(void)
pr_debug("PM: Reading hibernation image.\n");
error = swsusp_read(&flags);
+ swsusp_close(FMODE_READ);
if (!error)
hibernation_restore(flags & SF_PLATFORM_MODE);
@@ -737,6 +769,9 @@ static int software_resume(void)
mutex_unlock(&pm_mutex);
pr_debug("PM: Resume from disk failed.\n");
return error;
+close_finish:
+ swsusp_close(FMODE_READ);
+ goto Finish;
}
late_initcall(software_resume);
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 347d2cc88cd..0998c713905 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -220,6 +220,7 @@ static struct attribute_group attr_group = {
#ifdef CONFIG_PM_RUNTIME
struct workqueue_struct *pm_wq;
+EXPORT_SYMBOL_GPL(pm_wq);
static int __init pm_start_workqueue(void)
{
diff --git a/kernel/power/process.c b/kernel/power/process.c
index cc2e55373b6..5ade1bdcf36 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/syscalls.h>
#include <linux/freezer.h>
+#include <linux/delay.h>
/*
* Timeout for stopping processes
@@ -41,7 +42,7 @@ static int try_to_freeze_tasks(bool sig_only)
do_gettimeofday(&start);
end_time = jiffies + TIMEOUT;
- do {
+ while (true) {
todo = 0;
read_lock(&tasklist_lock);
do_each_thread(g, p) {
@@ -62,10 +63,15 @@ static int try_to_freeze_tasks(bool sig_only)
todo++;
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
- yield(); /* Yield is okay here */
- if (time_after(jiffies, end_time))
+ if (!todo || time_after(jiffies, end_time))
break;
- } while (todo);
+
+ /*
+ * We need to retry, but first give the freezing tasks some
+ * time to enter the regrigerator.
+ */
+ msleep(10);
+ }
do_gettimeofday(&end);
elapsed_csecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 17d8bb1acf9..25596e450ac 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -19,7 +19,7 @@
* The time it takes is system-specific though, so when we test this
* during system bootup we allow a LOT of time.
*/
-#define TEST_SUSPEND_SECONDS 5
+#define TEST_SUSPEND_SECONDS 10
static unsigned long suspend_test_start_time;
@@ -49,7 +49,8 @@ void suspend_test_finish(const char *label)
* has some performance issues. The stack dump of a WARN_ON
* is more likely to get the right attention than a printk...
*/
- WARN(msec > (TEST_SUSPEND_SECONDS * 1000), "Component: %s\n", label);
+ WARN(msec > (TEST_SUSPEND_SECONDS * 1000),
+ "Component: %s, time: %u\n", label, msec);
}
/*
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index b101cdc4df3..09b2b0ae9e9 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -38,6 +38,107 @@ struct swsusp_header {
static struct swsusp_header *swsusp_header;
+/**
+ * The following functions are used for tracing the allocated
+ * swap pages, so that they can be freed in case of an error.
+ */
+
+struct swsusp_extent {
+ struct rb_node node;
+ unsigned long start;
+ unsigned long end;
+};
+
+static struct rb_root swsusp_extents = RB_ROOT;
+
+static int swsusp_extents_insert(unsigned long swap_offset)
+{
+ struct rb_node **new = &(swsusp_extents.rb_node);
+ struct rb_node *parent = NULL;
+ struct swsusp_extent *ext;
+
+ /* Figure out where to put the new node */
+ while (*new) {
+ ext = container_of(*new, struct swsusp_extent, node);
+ parent = *new;
+ if (swap_offset < ext->start) {
+ /* Try to merge */
+ if (swap_offset == ext->start - 1) {
+ ext->start--;
+ return 0;
+ }
+ new = &((*new)->rb_left);
+ } else if (swap_offset > ext->end) {
+ /* Try to merge */
+ if (swap_offset == ext->end + 1) {
+ ext->end++;
+ return 0;
+ }
+ new = &((*new)->rb_right);
+ } else {
+ /* It already is in the tree */
+ return -EINVAL;
+ }
+ }
+ /* Add the new node and rebalance the tree. */
+ ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
+ if (!ext)
+ return -ENOMEM;
+
+ ext->start = swap_offset;
+ ext->end = swap_offset;
+ rb_link_node(&ext->node, parent, new);
+ rb_insert_color(&ext->node, &swsusp_extents);
+ return 0;
+}
+
+/**
+ * alloc_swapdev_block - allocate a swap page and register that it has
+ * been allocated, so that it can be freed in case of an error.
+ */
+
+sector_t alloc_swapdev_block(int swap)
+{
+ unsigned long offset;
+
+ offset = swp_offset(get_swap_page_of_type(swap));
+ if (offset) {
+ if (swsusp_extents_insert(offset))
+ swap_free(swp_entry(swap, offset));
+ else
+ return swapdev_block(swap, offset);
+ }
+ return 0;
+}
+
+/**
+ * free_all_swap_pages - free swap pages allocated for saving image data.
+ * It also frees the extents used to register which swap entres had been
+ * allocated.
+ */
+
+void free_all_swap_pages(int swap)
+{
+ struct rb_node *node;
+
+ while ((node = swsusp_extents.rb_node)) {
+ struct swsusp_extent *ext;
+ unsigned long offset;
+
+ ext = container_of(node, struct swsusp_extent, node);
+ rb_erase(node, &swsusp_extents);
+ for (offset = ext->start; offset <= ext->end; offset++)
+ swap_free(swp_entry(swap, offset));
+
+ kfree(ext);
+ }
+}
+
+int swsusp_swap_in_use(void)
+{
+ return (swsusp_extents.rb_node != NULL);
+}
+
/*
* General things
*/
@@ -314,7 +415,6 @@ static int save_image(struct swap_map_handle *handle,
{
unsigned int m;
int ret;
- int error = 0;
int nr_pages;
int err2;
struct bio *bio;
@@ -329,26 +429,27 @@ static int save_image(struct swap_map_handle *handle,
nr_pages = 0;
bio = NULL;
do_gettimeofday(&start);
- do {
+ while (1) {
ret = snapshot_read_next(snapshot, PAGE_SIZE);
- if (ret > 0) {
- error = swap_write_page(handle, data_of(*snapshot),
- &bio);
- if (error)
- break;
- if (!(nr_pages % m))
- printk("\b\b\b\b%3d%%", nr_pages / m);
- nr_pages++;
- }
- } while (ret > 0);
+ if (ret <= 0)
+ break;
+ ret = swap_write_page(handle, data_of(*snapshot), &bio);
+ if (ret)
+ break;
+ if (!(nr_pages % m))
+ printk(KERN_CONT "\b\b\b\b%3d%%", nr_pages / m);
+ nr_pages++;
+ }
err2 = wait_on_bio_chain(&bio);
do_gettimeofday(&stop);
- if (!error)
- error = err2;
- if (!error)
- printk("\b\b\b\bdone\n");
+ if (!ret)
+ ret = err2;
+ if (!ret)
+ printk(KERN_CONT "\b\b\b\bdone\n");
+ else
+ printk(KERN_CONT "\n");
swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
- return error;
+ return ret;
}
/**
@@ -536,7 +637,8 @@ static int load_image(struct swap_map_handle *handle,
snapshot_write_finalize(snapshot);
if (!snapshot_image_loaded(snapshot))
error = -ENODATA;
- }
+ } else
+ printk("\n");
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
return error;
}
@@ -572,8 +674,6 @@ int swsusp_read(unsigned int *flags_p)
error = load_image(&handle, &snapshot, header->pages - 1);
release_swap_reader(&handle);
- blkdev_put(resume_bdev, FMODE_READ);
-
if (!error)
pr_debug("PM: Image successfully loaded\n");
else
@@ -596,7 +696,7 @@ int swsusp_check(void)
error = bio_read_page(swsusp_resume_block,
swsusp_header, NULL);
if (error)
- return error;
+ goto put;
if (!memcmp(SWSUSP_SIG, swsusp_header->sig, 10)) {
memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10);
@@ -604,8 +704,10 @@ int swsusp_check(void)
error = bio_write_page(swsusp_resume_block,
swsusp_header, NULL);
} else {
- return -EINVAL;
+ error = -EINVAL;
}
+
+put:
if (error)
blkdev_put(resume_bdev, FMODE_READ);
else
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 6a07f4dbf2f..5b3601bd189 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -56,133 +56,3 @@
#include "power.h"
int in_suspend __nosavedata = 0;
-
-/**
- * The following functions are used for tracing the allocated
- * swap pages, so that they can be freed in case of an error.
- */
-
-struct swsusp_extent {
- struct rb_node node;
- unsigned long start;
- unsigned long end;
-};
-
-static struct rb_root swsusp_extents = RB_ROOT;
-
-static int swsusp_extents_insert(unsigned long swap_offset)
-{
- struct rb_node **new = &(swsusp_extents.rb_node);
- struct rb_node *parent = NULL;
- struct swsusp_extent *ext;
-
- /* Figure out where to put the new node */
- while (*new) {
- ext = container_of(*new, struct swsusp_extent, node);
- parent = *new;
- if (swap_offset < ext->start) {
- /* Try to merge */
- if (swap_offset == ext->start - 1) {
- ext->start--;
- return 0;
- }
- new = &((*new)->rb_left);
- } else if (swap_offset > ext->end) {
- /* Try to merge */
- if (swap_offset == ext->end + 1) {
- ext->end++;
- return 0;
- }
- new = &((*new)->rb_right);
- } else {
- /* It already is in the tree */
- return -EINVAL;
- }
- }
- /* Add the new node and rebalance the tree. */
- ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
- if (!ext)
- return -ENOMEM;
-
- ext->start = swap_offset;
- ext->end = swap_offset;
- rb_link_node(&ext->node, parent, new);
- rb_insert_color(&ext->node, &swsusp_extents);
- return 0;
-}
-
-/**
- * alloc_swapdev_block - allocate a swap page and register that it has
- * been allocated, so that it can be freed in case of an error.
- */
-
-sector_t alloc_swapdev_block(int swap)
-{
- unsigned long offset;
-
- offset = swp_offset(get_swap_page_of_type(swap));
- if (offset) {
- if (swsusp_extents_insert(offset))
- swap_free(swp_entry(swap, offset));
- else
- return swapdev_block(swap, offset);
- }
- return 0;
-}
-
-/**
- * free_all_swap_pages - free swap pages allocated for saving image data.
- * It also frees the extents used to register which swap entres had been
- * allocated.
- */
-
-void free_all_swap_pages(int swap)
-{
- struct rb_node *node;
-
- while ((node = swsusp_extents.rb_node)) {
- struct swsusp_extent *ext;
- unsigned long offset;
-
- ext = container_of(node, struct swsusp_extent, node);
- rb_erase(node, &swsusp_extents);
- for (offset = ext->start; offset <= ext->end; offset++)
- swap_free(swp_entry(swap, offset));
-
- kfree(ext);
- }
-}
-
-int swsusp_swap_in_use(void)
-{
- return (swsusp_extents.rb_node != NULL);
-}
-
-/**
- * swsusp_show_speed - print the time elapsed between two events represented by
- * @start and @stop
- *
- * @nr_pages - number of pages processed between @start and @stop
- * @msg - introductory message to print
- */
-
-void swsusp_show_speed(struct timeval *start, struct timeval *stop,
- unsigned nr_pages, char *msg)
-{
- s64 elapsed_centisecs64;
- int centisecs;
- int k;
- int kps;
-
- elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
- do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
- centisecs = elapsed_centisecs64;
- if (centisecs == 0)
- centisecs = 1; /* avoid div-by-zero */
- k = nr_pages * (PAGE_SIZE / 1024);
- kps = (k * 100) / centisecs;
- 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);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 22:52:45 +0000