Freezer Patches.

Nigel Cunningham
2005-06-01T12:34:59Z

[-- Attachment #1: Type: text/plain, Size: 195 bytes --]

Hi Pavel.

Here are the freezer patches. They were prepared against rc3, but I
think they still apply fine against rc5. (Ben, these are the same ones I
sent you the other day).

Regards,

Nigel

[-- Attachment #2: 300-workthreads.patch --]
[-- Type: text/x-patch, Size: 26559 bytes --]

diff -ruNp 210-workthreads.patch-old/drivers/acpi/osl.c 210-workthreads.patch-new/drivers/acpi/osl.c
--- 210-workthreads.patch-old/drivers/acpi/osl.c 2005-04-22 23:32:09.000000000 +1000
+++ 210-workthreads.patch-new/drivers/acpi/osl.c 2005-05-02 13:53:32.000000000 +1000
@@ -95,7 +95,7 @@ acpi_os_initialize1(void)
return AE_NULL_ENTRY;
}
#endif
- kacpid_wq = create_singlethread_workqueue("kacpid");
+ kacpid_wq = create_singlethread_workqueue("kacpid", PF_NOFREEZE);
BUG_ON(!kacpid_wq);

return AE_OK;
diff -ruNp 210-workthreads.patch-old/drivers/block/ll_rw_blk.c 210-workthreads.patch-new/drivers/block/ll_rw_blk.c
--- 210-workthreads.patch-old/drivers/block/ll_rw_blk.c 2005-04-22 23:32:09.000000000 +1000
+++ 210-workthreads.patch-new/drivers/block/ll_rw_blk.c 2005-05-02 13:53:32.000000000 +1000
@@ -3266,7 +3266,7 @@ EXPORT_SYMBOL(kblockd_flush);

int __init blk_dev_init(void)
{
- kblockd_workqueue = create_workqueue("kblockd");
+ kblockd_workqueue = create_workqueue("kblockd", PF_NOFREEZE);
if (!kblockd_workqueue)
panic("Failed to create kblockd\n");

diff -ruNp 210-workthreads.patch-old/drivers/block/pktcdvd.c 210-workthreads.patch-new/drivers/block/pktcdvd.c
--- 210-workthreads.patch-old/drivers/block/pktcdvd.c 2005-04-22 23:32:09.000000000 +1000
+++ 210-workthreads.patch-new/drivers/block/pktcdvd.c 2005-05-02 13:53:32.000000000 +1000
@@ -2366,7 +2366,7 @@ static int pkt_new_dev(struct pktcdvd_de
pkt_init_queue(pd);

atomic_set(&pd->cdrw.pending_bios, 0);
- pd->cdrw.thread = kthread_run(kcdrwd, pd, "%s", pd->name);
+ pd->cdrw.thread = kthread_run(kcdrwd, pd, 0, "%s", pd->name);
if (IS_ERR(pd->cdrw.thread)) {
printk("pktcdvd: can't start kernel thread\n");
ret = -ENOMEM;
diff -ruNp 210-workthreads.patch-old/drivers/char/hvc_console.c 210-workthreads.patch-new/drivers/char/hvc_console.c
--- 210-workthreads.patch-old/drivers/char/hvc_console.c 2005-02-03 22:33:25.000000000 +1100
+++ 210-workthreads.patch-new/drivers/char/hvc_console.c 2005-05-02 13:53:32.000000000 +1000
@@ -709,7 +709,7 @@ int __init hvc_init(void)

/* Always start the kthread because there can be hotplug vty adapters
* added later. */
- hvc_task = kthread_run(khvcd, NULL, "khvcd");
+ hvc_task = kthread_run(khvcd, NULL, PF_NOFREEZE, "khvcd");
if (IS_ERR(hvc_task)) {
panic("Couldn't create kthread for console.\n");
put_tty_driver(hvc_driver);
diff -ruNp 210-workthreads.patch-old/drivers/char/hvcs.c 210-workthreads.patch-new/drivers/char/hvcs.c
--- 210-workthreads.patch-old/drivers/char/hvcs.c 2005-02-14 09:05:25.000000000 +1100
+++ 210-workthreads.patch-new/drivers/char/hvcs.c 2005-05-02 13:53:32.000000000 +1000
@@ -1403,7 +1403,7 @@ static int __init hvcs_module_init(void)
return -ENOMEM;
}

- hvcs_task = kthread_run(khvcsd, NULL, "khvcsd");
+ hvcs_task = kthread_run(khvcsd, NULL, PF_NOFREEZE, "khvcsd");
if (IS_ERR(hvcs_task)) {
printk(KERN_ERR "HVCS: khvcsd creation failed. Driver not loaded.\n");
kfree(hvcs_pi_buff);
diff -ruNp 210-workthreads.patch-old/drivers/infiniband/core/fmr_pool.c 210-workthreads.patch-new/drivers/infiniband/core/fmr_pool.c
--- 210-workthreads.patch-old/drivers/infiniband/core/fmr_pool.c 2005-04-22 23:32:11.000000000 +1000
+++ 210-workthreads.patch-new/drivers/infiniband/core/fmr_pool.c 2005-05-02 13:53:32.000000000 +1000
@@ -266,6 +266,7 @@ struct ib_fmr_pool *ib_create_fmr_pool(s

pool->thread = kthread_create(ib_fmr_cleanup_thread,
pool,
+ 0,
"ib_fmr(%s)",
device->name);
if (IS_ERR(pool->thread)) {
diff -ruNp 210-workthreads.patch-old/drivers/infiniband/core/mad.c 210-workthreads.patch-new/drivers/infiniband/core/mad.c
--- 210-workthreads.patch-old/drivers/infiniband/core/mad.c 2005-04-22 23:32:11.000000000 +1000
+++ 210-workthreads.patch-new/drivers/infiniband/core/mad.c 2005-05-02 13:53:32.000000000 +1000
@@ -2502,7 +2502,7 @@ static int ib_mad_port_open(struct ib_de
goto error7;

snprintf(name, sizeof name, "ib_mad%d", port_num);
- port_priv->wq = create_singlethread_workqueue(name);
+ port_priv->wq = create_singlethread_workqueue(name, 0);
if (!port_priv->wq) {
ret = -ENOMEM;
goto error8;
diff -ruNp 210-workthreads.patch-old/drivers/infiniband/ulp/ipoib/ipoib_main.c 210-workthreads.patch-new/drivers/infiniband/ulp/ipoib/ipoib_main.c
--- 210-workthreads.patch-old/drivers/infiniband/ulp/ipoib/ipoib_main.c 2005-04-22 23:32:11.000000000 +1000
+++ 210-workthreads.patch-new/drivers/infiniband/ulp/ipoib/ipoib_main.c 2005-05-02 13:53:32.000000000 +1000
@@ -1070,7 +1070,7 @@ static int __init ipoib_init_module(void
* so flush_scheduled_work() can deadlock during device
* removal.
*/
- ipoib_workqueue = create_singlethread_workqueue("ipoib");
+ ipoib_workqueue = create_singlethread_workqueue("ipoib", 0);
if (!ipoib_workqueue) {
ret = -ENOMEM;
goto err_fs;
diff -ruNp 210-workthreads.patch-old/drivers/macintosh/therm_adt746x.c 210-workthreads.patch-new/drivers/macintosh/therm_adt746x.c
--- 210-workthreads.patch-old/drivers/macintosh/therm_adt746x.c 2005-04-22 23:32:12.000000000 +1000
+++ 210-workthreads.patch-new/drivers/macintosh/therm_adt746x.c 2005-05-02 13:53:32.000000000 +1000
@@ -438,7 +438,7 @@ static int attach_one_thermostat(struct
write_both_fan_speed(th, -1);
}

- thread_therm = kthread_run(monitor_task, th, "kfand");
+ thread_therm = kthread_run(monitor_task, th, 0, "kfand");

if (thread_therm == ERR_PTR(-ENOMEM)) {
printk(KERN_INFO "adt746x: Kthread creation failed\n");
diff -ruNp 210-workthreads.patch-old/drivers/md/dm-crypt.c 210-workthreads.patch-new/drivers/md/dm-crypt.c
--- 210-workthreads.patch-old/drivers/md/dm-crypt.c 2005-04-22 23:32:12.000000000 +1000
+++ 210-workthreads.patch-new/drivers/md/dm-crypt.c 2005-05-02 13:53:32.000000000 +1000
@@ -936,7 +936,7 @@ static int __init dm_crypt_init(void)
if (!_crypt_io_pool)
return -ENOMEM;

- _kcryptd_workqueue = create_workqueue("kcryptd");
+ _kcryptd_workqueue = create_workqueue("kcryptd", PF_NOFREEZE);
if (!_kcryptd_workqueue) {
r = -ENOMEM;
DMERR(PFX "couldn't create kcryptd");
diff -ruNp 210-workthreads.patch-old/drivers/md/dm-raid1.c 210-workthreads.patch-new/drivers/md/dm-raid1.c
--- 210-workthreads.patch-old/drivers/md/dm-raid1.c 2005-04-22 23:32:12.000000000 +1000
+++ 210-workthreads.patch-new/drivers/md/dm-raid1.c 2005-05-02 13:53:32.000000000 +1000
@@ -1229,7 +1229,7 @@ static int __init dm_mirror_init(void)
if (r)
return r;

- _kmirrord_wq = create_workqueue("kmirrord");
+ _kmirrord_wq = create_workqueue("kmirrord", PF_SYNCTHREAD);
if (!_kmirrord_wq) {
DMERR("couldn't start kmirrord");
dm_dirty_log_exit();
diff -ruNp 210-workthreads.patch-old/drivers/md/kcopyd.c 210-workthreads.patch-new/drivers/md/kcopyd.c
--- 210-workthreads.patch-old/drivers/md/kcopyd.c 2005-02-03 22:33:28.000000000 +1100
+++ 210-workthreads.patch-new/drivers/md/kcopyd.c 2005-05-02 13:53:32.000000000 +1000
@@ -609,7 +609,7 @@ static int kcopyd_init(void)
return r;
}

- _kcopyd_wq = create_singlethread_workqueue("kcopyd");
+ _kcopyd_wq = create_singlethread_workqueue("kcopyd", PF_SYNCTHREAD);
if (!_kcopyd_wq) {
jobs_exit();
up(&kcopyd_init_lock);
diff -ruNp 210-workthreads.patch-old/drivers/media/video/cx88/cx88-video.c 210-workthreads.patch-new/drivers/media/video/cx88/cx88-video.c
--- 210-workthreads.patch-old/drivers/media/video/cx88/cx88-video.c 2005-04-22 23:32:12.000000000 +1000
+++ 210-workthreads.patch-new/drivers/media/video/cx88/cx88-video.c 2005-05-02 13:53:32.000000000 +1000
@@ -2121,7 +2121,7 @@ static int __devinit cx8800_initdev(stru

/* start tvaudio thread */
if (core->tuner_type != TUNER_ABSENT)
- core->kthread = kthread_run(cx88_audio_thread, core, "cx88 tvaudio");
+ core->kthread = kthread_run(cx88_audio_thread, core, 0, "cx88 tvaudio");
return 0;

fail_unreg:
diff -ruNp 210-workthreads.patch-old/drivers/media/video/msp3400.c 210-workthreads.patch-new/drivers/media/video/msp3400.c
--- 210-workthreads.patch-old/drivers/media/video/msp3400.c 2005-04-22 23:32:12.000000000 +1000
+++ 210-workthreads.patch-new/drivers/media/video/msp3400.c 2005-05-02 13:53:32.000000000 +1000
@@ -1555,7 +1555,7 @@ static int msp_attach(struct i2c_adapter

/* startup control thread if needed */
if (thread_func) {
- msp->kthread = kthread_run(thread_func, c, "msp34xx");
+ msp->kthread = kthread_run(thread_func, c, 0, "msp34xx");
if (NULL == msp->kthread)
printk(KERN_WARNING "msp34xx: kernel_thread() failed\n");
msp_wake_thread(c);
diff -ruNp 210-workthreads.patch-old/drivers/media/video/video-buf-dvb.c 210-workthreads.patch-new/drivers/media/video/video-buf-dvb.c
--- 210-workthreads.patch-old/drivers/media/video/video-buf-dvb.c 2005-02-03 22:33:29.000000000 +1100
+++ 210-workthreads.patch-new/drivers/media/video/video-buf-dvb.c 2005-05-02 13:53:32.000000000 +1000
@@ -104,7 +104,7 @@ static int videobuf_dvb_start_feed(struc
if (NULL != dvb->thread)
goto out;
dvb->thread = kthread_run(videobuf_dvb_thread,
- dvb, "%s dvb", dvb->name);
+ dvb, 0, "%s dvb", dvb->name);
if (IS_ERR(dvb->thread)) {
rc = PTR_ERR(dvb->thread);
dvb->thread = NULL;
diff -ruNp 210-workthreads.patch-old/drivers/message/i2o/driver.c 210-workthreads.patch-new/drivers/message/i2o/driver.c
--- 210-workthreads.patch-old/drivers/message/i2o/driver.c 2005-02-03 22:33:29.000000000 +1100
+++ 210-workthreads.patch-new/drivers/message/i2o/driver.c 2005-05-02 13:53:32.000000000 +1000
@@ -79,7 +79,7 @@ int i2o_driver_register(struct i2o_drive
pr_debug("i2o: Register driver %s\n", drv->name);

if (drv->event) {
- drv->event_queue = create_workqueue(drv->name);
+ drv->event_queue = create_workqueue(drv->name, 0);
if (!drv->event_queue) {
printk(KERN_ERR "i2o: Could not initialize event queue "
"for driver %s\n", drv->name);
diff -ruNp 210-workthreads.patch-old/drivers/net/wan/sdlamain.c 210-workthreads.patch-new/drivers/net/wan/sdlamain.c
--- 210-workthreads.patch-old/drivers/net/wan/sdlamain.c 2004-11-03 21:54:35.000000000 +1100
+++ 210-workthreads.patch-new/drivers/net/wan/sdlamain.c 2005-05-02 13:53:32.000000000 +1000
@@ -240,7 +240,7 @@ static int __init wanpipe_init(void)
printk(KERN_INFO "%s v%u.%u %s\n",
fullname, DRV_VERSION, DRV_RELEASE, copyright);

- wanpipe_wq = create_workqueue("wanpipe_wq");
+ wanpipe_wq = create_workqueue("wanpipe_wq", 0);
if (!wanpipe_wq)
return -ENOMEM;

diff -ruNp 210-workthreads.patch-old/drivers/s390/cio/device.c 210-workthreads.patch-new/drivers/s390/cio/device.c
--- 210-workthreads.patch-old/drivers/s390/cio/device.c 2005-04-22 23:32:15.000000000 +1000
+++ 210-workthreads.patch-new/drivers/s390/cio/device.c 2005-05-02 13:53:32.000000000 +1000
@@ -148,15 +148,16 @@ init_ccw_bus_type (void)
init_waitqueue_head(&ccw_device_init_wq);
atomic_set(&ccw_device_init_count, 0);

- ccw_device_work = create_singlethread_workqueue("cio");
+ ccw_device_work = create_singlethread_workqueue("cio", 0);
if (!ccw_device_work)
return -ENOMEM; /* FIXME: better errno ? */
- ccw_device_notify_work = create_singlethread_workqueue("cio_notify");
+ ccw_device_notify_work = create_singlethread_workqueue("cio_notify",
+ 0);
if (!ccw_device_notify_work) {
ret = -ENOMEM; /* FIXME: better errno ? */
goto out_err;
}
- slow_path_wq = create_singlethread_workqueue("kslowcrw");
+ slow_path_wq = create_singlethread_workqueue("kslowcrw", 0);
if (!slow_path_wq) {
ret = -ENOMEM; /* FIXME: better errno ? */
goto out_err;
diff -ruNp 210-workthreads.patch-old/drivers/scsi/hosts.c 210-workthreads.patch-new/drivers/scsi/hosts.c
--- 210-workthreads.patch-old/drivers/scsi/hosts.c 2005-04-22 23:32:16.000000000 +1000
+++ 210-workthreads.patch-new/drivers/scsi/hosts.c 2005-05-02 13:53:32.000000000 +1000
@@ -133,7 +133,7 @@ int scsi_add_host(struct Scsi_Host *shos
snprintf(shost->work_q_name, KOBJ_NAME_LEN, "scsi_wq_%d",
shost->host_no);
shost->work_q = create_singlethread_workqueue(
- shost->work_q_name);
+ shost->work_q_name, PF_NOFREEZE);
if (!shost->work_q)
goto out_free_shost_data;
}
diff -ruNp 210-workthreads.patch-old/drivers/scsi/libata-core.c 210-workthreads.patch-new/drivers/scsi/libata-core.c
--- 210-workthreads.patch-old/drivers/scsi/libata-core.c 2005-04-22 23:32:16.000000000 +1000
+++ 210-workthreads.patch-new/drivers/scsi/libata-core.c 2005-05-02 13:53:32.000000000 +1000
@@ -3951,7 +3951,7 @@ int pci_test_config_bits(struct pci_dev

static int __init ata_init(void)
{
- ata_wq = create_workqueue("ata");
+ ata_wq = create_workqueue("ata", 0);
if (!ata_wq)
return -ENOMEM;

diff -ruNp 210-workthreads.patch-old/drivers/usb/net/pegasus.c 210-workthreads.patch-new/drivers/usb/net/pegasus.c
--- 210-workthreads.patch-old/drivers/usb/net/pegasus.c 2005-04-22 23:32:18.000000000 +1000
+++ 210-workthreads.patch-new/drivers/usb/net/pegasus.c 2005-05-02 13:53:32.000000000 +1000
@@ -1412,7 +1412,7 @@ static struct usb_driver pegasus_driver
static int __init pegasus_init(void)
{
pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
- pegasus_workqueue = create_singlethread_workqueue("pegasus");
+ pegasus_workqueue = create_singlethread_workqueue("pegasus", PF_NOFREEZE);
if (!pegasus_workqueue)
return -ENOMEM;
return usb_register(&pegasus_driver);
diff -ruNp 210-workthreads.patch-old/fs/aio.c 210-workthreads.patch-new/fs/aio.c
--- 210-workthreads.patch-old/fs/aio.c 2005-04-22 23:32:19.000000000 +1000
+++ 210-workthreads.patch-new/fs/aio.c 2005-05-02 13:53:32.000000000 +1000
@@ -73,7 +73,7 @@ static int __init aio_setup(void)
kioctx_cachep = kmem_cache_create("kioctx", sizeof(struct kioctx),
0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);

- aio_wq = create_workqueue("aio");
+ aio_wq = create_workqueue("aio", 0);

pr_debug("aio_setup: sizeof(struct page) = %d\n", (int)sizeof(struct page));

diff -ruNp 210-workthreads.patch-old/fs/nfsd/nfs4state.c 210-workthreads.patch-new/fs/nfsd/nfs4state.c
--- 210-workthreads.patch-old/fs/nfsd/nfs4state.c 2005-04-22 23:32:19.000000000 +1000
+++ 210-workthreads.patch-new/fs/nfsd/nfs4state.c 2005-05-02 13:53:32.000000000 +1000
@@ -1356,7 +1356,7 @@ void nfsd_break_deleg_cb(struct file_loc
/* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;

- t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
+ t = kthread_run(do_recall, dp, 0, "%s", "nfs4_cb_recall");
if (IS_ERR(t)) {
struct nfs4_client *clp = dp->dl_client;

diff -ruNp 210-workthreads.patch-old/fs/reiserfs/journal.c 210-workthreads.patch-new/fs/reiserfs/journal.c
--- 210-workthreads.patch-old/fs/reiserfs/journal.c 2005-04-22 23:32:19.000000000 +1000
+++ 210-workthreads.patch-new/fs/reiserfs/journal.c 2005-05-02 13:53:32.000000000 +1000
@@ -2512,7 +2512,7 @@ int journal_init(struct super_block *p_s

reiserfs_mounted_fs_count++ ;
if (reiserfs_mounted_fs_count <= 1)
- commit_wq = create_workqueue("reiserfs");
+ commit_wq = create_workqueue("reiserfs", PF_SYNCTHREAD);

INIT_WORK(&journal->j_work, flush_async_commits, p_s_sb);
return 0 ;
diff -ruNp 210-workthreads.patch-old/fs/xfs/linux-2.6/xfs_buf.c 210-workthreads.patch-new/fs/xfs/linux-2.6/xfs_buf.c
--- 210-workthreads.patch-old/fs/xfs/linux-2.6/xfs_buf.c 2005-04-22 23:32:19.000000000 +1000
+++ 210-workthreads.patch-new/fs/xfs/linux-2.6/xfs_buf.c 2005-05-02 13:53:53.000000000 +1000
@@ -1895,11 +1895,11 @@ pagebuf_daemon_start(void)
{
int rval;

- pagebuf_logio_workqueue = create_workqueue("xfslogd");
+ pagebuf_logio_workqueue = create_workqueue("xfslogd", PF_SYNCTHREAD);
if (!pagebuf_logio_workqueue)
return -ENOMEM;

- pagebuf_dataio_workqueue = create_workqueue("xfsdatad");
+ pagebuf_dataio_workqueue = create_workqueue("xfsdatad", PF_SYNCTHREAD);
if (!pagebuf_dataio_workqueue) {
destroy_workqueue(pagebuf_logio_workqueue);
return -ENOMEM;
diff -ruNp 210-workthreads.patch-old/include/linux/kthread.h 210-workthreads.patch-new/include/linux/kthread.h
--- 210-workthreads.patch-old/include/linux/kthread.h 2004-11-03 21:51:12.000000000 +1100
+++ 210-workthreads.patch-new/include/linux/kthread.h 2005-05-02 13:53:32.000000000 +1000
@@ -25,20 +25,26 @@
*/
struct task_struct *kthread_create(int (*threadfn)(void *data),
void *data,
+ unsigned long freezer_flags,
const char namefmt[], ...);

/**
* kthread_run: create and wake a thread.
* @threadfn: the function to run until signal_pending(current).
* @data: data ptr for @threadfn.
+ * @freezer_flags: process flags that should be used for freezing.
+ * PF_SYNCTHREAD if needed for syncing data to disk.
+ * PF_NOFREEZE if also needed for writing the image.
+ * 0 otherwise.
* @namefmt: printf-style name for the thread.
*
* Description: Convenient wrapper for kthread_create() followed by
* wake_up_process(). Returns the kthread, or ERR_PTR(-ENOMEM). */
-#define kthread_run(threadfn, data, namefmt, ...) \
+#define kthread_run(threadfn, data, freezer_flags, namefmt, ...) \
({ \
struct task_struct *__k \
- = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
+ = kthread_create(threadfn, data, freezer_flags, \
+ namefmt, ## __VA_ARGS__); \
if (!IS_ERR(__k)) \
wake_up_process(__k); \
__k; \
diff -ruNp 210-workthreads.patch-old/include/linux/workqueue.h 210-workthreads.patch-new/include/linux/workqueue.h
--- 210-workthreads.patch-old/include/linux/workqueue.h 2005-04-22 23:32:24.000000000 +1000
+++ 210-workthreads.patch-new/include/linux/workqueue.h 2005-05-02 13:53:32.000000000 +1000
@@ -51,9 +51,10 @@ struct work_struct {
} while (0)

extern struct workqueue_struct *__create_workqueue(const char *name,
- int singlethread);
-#define create_workqueue(name) __create_workqueue((name), 0)
-#define create_singlethread_workqueue(name) __create_workqueue((name), 1)
+ int singlethread,
+ unsigned long freezer_flag);
+#define create_workqueue(name, flags) __create_workqueue((name), 0, flags)
+#define create_singlethread_workqueue(name, flags) __create_workqueue((name), 1, flags)

extern void destroy_workqueue(struct workqueue_struct *wq);

diff -ruNp 210-workthreads.patch-old/kernel/kmod.c 210-workthreads.patch-new/kernel/kmod.c
--- 210-workthreads.patch-old/kernel/kmod.c 2004-12-10 14:27:00.000000000 +1100
+++ 210-workthreads.patch-new/kernel/kmod.c 2005-05-02 13:53:32.000000000 +1000
@@ -251,6 +251,6 @@ EXPORT_SYMBOL(call_usermodehelper);

void __init usermodehelper_init(void)
{
- khelper_wq = create_singlethread_workqueue("khelper");
+ khelper_wq = create_singlethread_workqueue("khelper", 0);
BUG_ON(!khelper_wq);
}
diff -ruNp 210-workthreads.patch-old/kernel/kthread.c 210-workthreads.patch-new/kernel/kthread.c
--- 210-workthreads.patch-old/kernel/kthread.c 2005-02-03 22:33:50.000000000 +1100
+++ 210-workthreads.patch-new/kernel/kthread.c 2005-05-02 13:53:32.000000000 +1000
@@ -25,6 +25,7 @@ struct kthread_create_info
/* Information passed to kthread() from keventd. */
int (*threadfn)(void *data);
void *data;
+ unsigned long freezer_flags;
struct completion started;

/* Result passed back to kthread_create() from keventd. */
@@ -86,6 +87,10 @@ static int kthread(void *_create)
/* By default we can run anywhere, unlike keventd. */
set_cpus_allowed(current, CPU_MASK_ALL);

+ /* Set our freezer flags */
+ current->flags &= ~(PF_SYNCTHREAD | PF_NOFREEZE);
+ current->flags |= create->freezer_flags;
+
/* OK, tell user we're spawned, wait for stop or wakeup */
__set_current_state(TASK_INTERRUPTIBLE);
complete(&create->started);
@@ -121,6 +126,7 @@ static void keventd_create_kthread(void

struct task_struct *kthread_create(int (*threadfn)(void *data),
void *data,
+ unsigned long freezer_flags,
const char namefmt[],
...)
{
@@ -129,6 +135,7 @@ struct task_struct *kthread_create(int (

create.threadfn = threadfn;
create.data = data;
+ create.freezer_flags = freezer_flags;
init_completion(&create.started);
init_completion(&create.done);

@@ -193,7 +200,7 @@ EXPORT_SYMBOL(kthread_stop);

static __init int helper_init(void)
{
- helper_wq = create_singlethread_workqueue("kthread");
+ helper_wq = create_singlethread_workqueue("kthread", 0);
BUG_ON(!helper_wq);

return 0;
diff -ruNp 210-workthreads.patch-old/kernel/sched.c 210-workthreads.patch-new/kernel/sched.c
--- 210-workthreads.patch-old/kernel/sched.c 2005-04-22 23:32:24.000000000 +1000
+++ 210-workthreads.patch-new/kernel/sched.c 2005-05-02 13:53:32.000000000 +1000
@@ -4379,10 +4379,10 @@ static int migration_call(struct notifie

switch (action) {
case CPU_UP_PREPARE:
- p = kthread_create(migration_thread, hcpu, "migration/%d",cpu);
+ p = kthread_create(migration_thread, hcpu, 0,
+ "migration/%d",cpu);
if (IS_ERR(p))
return NOTIFY_BAD;
- p->flags |= PF_NOFREEZE;
kthread_bind(p, cpu);
/* Must be high prio: stop_machine expects to yield to it. */
rq = task_rq_lock(p, &flags);
diff -ruNp 210-workthreads.patch-old/kernel/softirq.c 210-workthreads.patch-new/kernel/softirq.c
--- 210-workthreads.patch-old/kernel/softirq.c 2005-04-22 23:32:24.000000000 +1000
+++ 210-workthreads.patch-new/kernel/softirq.c 2005-05-02 13:53:32.000000000 +1000
@@ -350,7 +350,6 @@ void __init softirq_init(void)
static int ksoftirqd(void * __bind_cpu)
{
set_user_nice(current, 19);
- current->flags |= PF_NOFREEZE;

set_current_state(TASK_INTERRUPTIBLE);

@@ -364,6 +363,8 @@ static int ksoftirqd(void * __bind_cpu)

__set_current_state(TASK_RUNNING);

+ try_to_freeze(PF_FREEZE);
+
while (local_softirq_pending()) {
/* Preempt disable stops cpu going offline.
If already offline, we'll be on wrong CPU:
@@ -456,7 +457,7 @@ static int __devinit cpu_callback(struct
case CPU_UP_PREPARE:
BUG_ON(per_cpu(tasklet_vec, hotcpu).list);
BUG_ON(per_cpu(tasklet_hi_vec, hotcpu).list);
- p = kthread_create(ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
+ p = kthread_create(ksoftirqd, hcpu, PF_NOFREEZE, "ksoftirqd/%d", hotcpu);
if (IS_ERR(p)) {
printk("ksoftirqd for %i failed\n", hotcpu);
return NOTIFY_BAD;
diff -ruNp 210-workthreads.patch-old/kernel/stop_machine.c 210-workthreads.patch-new/kernel/stop_machine.c
--- 210-workthreads.patch-old/kernel/stop_machine.c 2005-04-22 23:32:24.000000000 +1000
+++ 210-workthreads.patch-new/kernel/stop_machine.c 2005-05-02 13:53:32.000000000 +1000
@@ -184,7 +184,7 @@ struct task_struct *__stop_machine_run(i
if (cpu == NR_CPUS)
cpu = _smp_processor_id();

- p = kthread_create(do_stop, &smdata, "kstopmachine");
+ p = kthread_create(do_stop, &smdata, 0, "kstopmachine");
if (!IS_ERR(p)) {
kthread_bind(p, cpu);
wake_up_process(p);
diff -ruNp 210-workthreads.patch-old/kernel/workqueue.c 210-workthreads.patch-new/kernel/workqueue.c
--- 210-workthreads.patch-old/kernel/workqueue.c 2005-04-22 23:32:24.000000000 +1000
+++ 210-workthreads.patch-new/kernel/workqueue.c 2005-05-02 13:53:32.000000000 +1000
@@ -186,8 +186,6 @@ static int worker_thread(void *__cwq)
struct k_sigaction sa;
sigset_t blocked;

- current->flags |= PF_NOFREEZE;
-
set_user_nice(current, -5);

/* Block and flush all signals */
@@ -208,6 +206,7 @@ static int worker_thread(void *__cwq)
schedule();
else
__set_current_state(TASK_RUNNING);
+ try_to_freeze(PF_FREEZE);
remove_wait_queue(&cwq->more_work, &wait);

if (!list_empty(&cwq->worklist))
@@ -277,7 +276,8 @@ void fastcall flush_workqueue(struct wor
}

static struct task_struct *create_workqueue_thread(struct workqueue_struct *wq,
- int cpu)
+ int cpu,
+ unsigned long freezer_flags)
{
struct cpu_workqueue_struct *cwq = wq->cpu_wq + cpu;
struct task_struct *p;
@@ -292,9 +292,11 @@ static struct task_struct *create_workqu
init_waitqueue_head(&cwq->work_done);

if (is_single_threaded(wq))
- p = kthread_create(worker_thread, cwq, "%s", wq->name);
+ p = kthread_create(worker_thread, cwq, freezer_flags,
+ "%s", wq->name);
else
- p = kthread_create(worker_thread, cwq, "%s/%d", wq->name, cpu);
+ p = kthread_create(worker_thread, cwq, freezer_flags,
+ "%s/%d", wq->name, cpu);
if (IS_ERR(p))
return NULL;
cwq->thread = p;
@@ -302,7 +304,8 @@ static struct task_struct *create_workqu
}

struct workqueue_struct *__create_workqueue(const char *name,
- int singlethread)
+ int singlethread,
+ unsigned long freezer_flags)
{
int cpu, destroy = 0;
struct workqueue_struct *wq;
@@ -320,7 +323,7 @@ struct workqueue_struct *__create_workqu
lock_cpu_hotplug();
if (singlethread) {
INIT_LIST_HEAD(&wq->list);
- p = create_workqueue_thread(wq, 0);
+ p = create_workqueue_thread(wq, 0, freezer_flags);
if (!p)
destroy = 1;
else
@@ -330,7 +333,7 @@ struct workqueue_struct *__create_workqu
list_add(&wq->list, &workqueues);
spin_unlock(&workqueue_lock);
for_each_online_cpu(cpu) {
- p = create_workqueue_thread(wq, cpu);
+ p = create_workqueue_thread(wq, cpu, freezer_flags);
if (p) {
kthread_bind(p, cpu);
wake_up_process(p);
@@ -540,7 +543,7 @@ static int __devinit workqueue_cpu_callb
void init_workqueues(void)
{
hotcpu_notifier(workqueue_cpu_callback, 0);
- keventd_wq = create_workqueue("events");
+ keventd_wq = create_workqueue("events", PF_NOFREEZE);
BUG_ON(!keventd_wq);
}

diff -ruNp 210-workthreads.patch-old/mm/pdflush.c 210-workthreads.patch-new/mm/pdflush.c
--- 210-workthreads.patch-old/mm/pdflush.c 2005-02-03 22:33:50.000000000 +1100
+++ 210-workthreads.patch-new/mm/pdflush.c 2005-05-02 13:53:53.000000000 +1000
@@ -213,7 +213,7 @@ int pdflush_operation(void (*fn)(unsigne

static void start_one_pdflush_thread(void)
{
- kthread_run(pdflush, NULL, "pdflush");
+ kthread_run(pdflush, NULL, PF_SYNCTHREAD, "pdflush");
}

static int __init pdflush_init(void)
diff -ruNp 210-workthreads.patch-old/net/sunrpc/sched.c 210-workthreads.patch-new/net/sunrpc/sched.c
--- 210-workthreads.patch-old/net/sunrpc/sched.c 2005-04-22 23:32:26.000000000 +1000
+++ 210-workthreads.patch-new/net/sunrpc/sched.c 2005-05-02 13:53:32.000000000 +1000
@@ -1003,7 +1003,7 @@ rpciod_up(void)
* Create the rpciod thread and wait for it to start.
*/
error = -ENOMEM;
- wq = create_workqueue("rpciod");
+ wq = create_workqueue("rpciod", 0);
if (wq == NULL) {
printk(KERN_WARNING "rpciod_up: create workqueue failed, error=%d\n", error);
rpciod_users--;

[-- Attachment #3: 301-refrigerator.patch --]
[-- Type: text/x-patch, Size: 12695 bytes --]

diff -ruNp 211-refrigerator.patch-old/include/linux/sched.h 211-refrigerator.patch-new/include/linux/sched.h
--- 211-refrigerator.patch-old/include/linux/sched.h 2005-04-22 23:32:23.000000000 +1000
+++ 211-refrigerator.patch-new/include/linux/sched.h 2005-05-02 16:53:47.000000000 +1000
@@ -1248,6 +1248,7 @@ extern void normalize_rt_tasks(void);
extern void refrigerator(unsigned long);
extern int freeze_processes(void);
extern void thaw_processes(void);
+extern unsigned int refrigerator_on;

static inline int try_to_freeze(unsigned long refrigerator_flags)
{
@@ -1261,6 +1262,7 @@ static inline int try_to_freeze(unsigned
static inline void refrigerator(unsigned long flag) {}
static inline int freeze_processes(void) { BUG(); return 0; }
static inline void thaw_processes(void) {}
+#define refrigerator_on (0)

static inline int try_to_freeze(unsigned long refrigerator_flags)
{
diff -ruNp 211-refrigerator.patch-old/kernel/exit.c 211-refrigerator.patch-new/kernel/exit.c
--- 211-refrigerator.patch-old/kernel/exit.c 2005-05-02 16:53:40.000000000 +1000
+++ 211-refrigerator.patch-new/kernel/exit.c 2005-05-02 16:13:38.000000000 +1000
@@ -789,6 +789,8 @@ fastcall NORET_TYPE void do_exit(long co
panic("Attempted to kill init!");
if (tsk->io_context)
exit_io_context();
+ if (unlikely(refrigerator_on))
+ refrigerator(0);

if (unlikely(current->ptrace & PT_TRACE_EXIT)) {
current->ptrace_message = code;
diff -ruNp 211-refrigerator.patch-old/kernel/fork.c 211-refrigerator.patch-new/kernel/fork.c
--- 211-refrigerator.patch-old/kernel/fork.c 2005-04-22 23:32:24.000000000 +1000
+++ 211-refrigerator.patch-new/kernel/fork.c 2005-05-02 16:13:38.000000000 +1000
@@ -1200,6 +1200,9 @@ long do_fork(unsigned long clone_flags,
int trace = 0;
long pid = alloc_pidmap();

+ if (unlikely(refrigerator_on))
+ refrigerator(0);
+
if (pid < 0)
return -EAGAIN;
if (unlikely(current->ptrace)) {
diff -ruNp 211-refrigerator.patch-old/kernel/kmod.c 211-refrigerator.patch-new/kernel/kmod.c
--- 211-refrigerator.patch-old/kernel/kmod.c 2005-05-02 16:53:40.000000000 +1000
+++ 211-refrigerator.patch-new/kernel/kmod.c 2005-05-02 16:13:38.000000000 +1000
@@ -237,7 +237,7 @@ int call_usermodehelper(char *path, char
};
DECLARE_WORK(work, __call_usermodehelper, &sub_info);

- if (!khelper_wq)
+ if ((!khelper_wq) || (refrigerator_on))
return -EBUSY;

if (path[0] == '\0')
diff -ruNp 211-refrigerator.patch-old/kernel/power/process.c 211-refrigerator.patch-new/kernel/power/process.c
--- 211-refrigerator.patch-old/kernel/power/process.c 2004-12-10 14:26:31.000000000 +1100
+++ 211-refrigerator.patch-new/kernel/power/process.c 2005-05-02 16:49:35.000000000 +1000
@@ -1,121 +1,317 @@
/*
- * drivers/power/process.c - Functions for starting/stopping processes on
- * suspend transitions.
+ * kernel/power/process.c
*
- * Originally from swsusp.
+ * Copyright (C) 1998-2001 Gabor Kuti <seasons@fornax.hu>
+ * Copyright (C) 1998,2001,2002 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 2002-2003 Florent Chabaud <fchabaud@free.fr>
+ * Copyright (C) 2002-2005 Nigel Cunningham <nigel@suspend2.net>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Freeze_and_free contains the routines software suspend uses to freeze other
+ * processes during the suspend cycle.
+ *
+ * Under high I/O load, we need to be careful about the order in which we
+ * freeze processes. If we freeze processes in the wrong order, we could
+ * deadlock others. The freeze_order array this specifies the order in which
+ * critical processes are frozen. All others are suspended after these have
+ * entered the refrigerator.
+ *
+ * Other processes on an SMP system have been taken care of already when we
+ * use these routines. We assume there are no races or locking issues.
*/

+#include <linux/module.h>
+//#include <linux/suspend.h>
+#include <asm/tlbflush.h>
+#include <linux/sched.h>
+
+unsigned int refrigerator_on = 0;

-#undef DEBUG
+static unsigned int sync_freeze = 0;

-#include <linux/smp_lock.h>
-#include <linux/interrupt.h>
-#include <linux/suspend.h>
-#include <linux/module.h>
+atomic_t __nosavedata suspend_cpu_counter = { 0 };

-/*
- * Timeout for stopping processes
- */
-#define TIMEOUT (6 * HZ)
+/* Timeouts when freezing */
+#define FREEZER_TOTAL_TIMEOUT (5 * HZ)
+#define FREEZER_CHECK_TIMEOUT (HZ / 10)

+/**
+ * refrigerator - idle routine for frozen processes
+ * @flag: unsigned long, non zero if signals to be flushed.
+ *
+ * A routine for threads which should not do work during suspend
+ * to enter and spin in until the process is finished.
+ */

-static inline int freezeable(struct task_struct * p)
+void refrigerator(unsigned long flag)
{
- if ((p == current) ||
+ unsigned long flags;
+ long save;
+
+ if (unlikely(current->flags & PF_NOFREEZE)) {
+ current->flags &= ~PF_FREEZE;
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+ return;
+ }
+
+ /* You need correct to work with real-time processes.
+ OTOH, this way one process may see (via /proc/) some other
+ process in stopped state (and thereby discovered we were
+ suspended. We probably do not care).
+ */
+ if ((flag) && (current->flags & PF_FREEZE)) {
+
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+ }
+
+ if (refrigerator_on) {
+ save = current->state;
+ current->flags |= PF_FROZEN;
+ while (current->flags & PF_FROZEN) {
+ current->state = TASK_STOPPED;
+ schedule();
+ if (flag) {
+ spin_lock_irqsave(
+ &current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(
+ &current->sighand->siglock, flags);
+ }
+ }
+ current->state = save;
+ }
+ current->flags &= ~PF_FREEZE;
+ spin_lock_irqsave(&current->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(&current->sighand->siglock, flags);
+}
+
+/*
+ * to_be_frozen
+ *
+ * Description: Determine whether a process should be frozen yet.
+ * Parameters: struct task_struct * The process to consider.
+ * int Which group of processes to consider.
+ * Returns: int 0 if don't freeze yet, otherwise do.
+ */
+static int to_be_frozen(struct task_struct * p, int type_being_frozen) {
+
+ if ((p == current) ||
(p->flags & PF_NOFREEZE) ||
(p->exit_state == EXIT_ZOMBIE) ||
(p->exit_state == EXIT_DEAD) ||
(p->state == TASK_STOPPED) ||
(p->state == TASK_TRACED))
return 0;
+ if ((!(p->mm)) && (type_being_frozen < 3))
+ return 0;
+ if ((p->flags & PF_SYNCTHREAD) && (type_being_frozen == 1))
+ return 0;
+ if ((p->state == TASK_UNINTERRUPTIBLE) && (type_being_frozen == 3))
+ return 0;
return 1;
}

-/* Refrigerator is place where frozen processes are stored :-). */
-void refrigerator(unsigned long flag)
-{
- /* Hmm, should we be allowed to suspend when there are realtime
- processes around? */
- long save;
- save = current->state;
- current->state = TASK_UNINTERRUPTIBLE;
- pr_debug("%s entered refrigerator\n", current->comm);
- printk("=");
- current->flags &= ~PF_FREEZE;
+/*
+ * num_to_be_frozen
+ *
+ * Description: Determine how many processes of our type are still to be
+ * frozen. As a side effect, update the progress bar too.
+ * Parameters: int Which type we are trying to freeze.
+ */
+static int num_to_be_frozen(int type_being_frozen) {
+
+ struct task_struct *p, *g;
+ int todo_this_type = 0, total_todo = 0;
+ int total_threads = 0;
+
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ if (to_be_frozen(p, type_being_frozen)) {
+ todo_this_type++;
+ total_todo++;
+ } else if (to_be_frozen(p, 3))
+ total_todo++;
+ total_threads++;
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);

- spin_lock_irq(&current->sighand->siglock);
- recalc_sigpending(); /* We sent fake signal, clean it up */
- spin_unlock_irq(&current->sighand->siglock);
-
- current->flags |= PF_FROZEN;
- while (current->flags & PF_FROZEN)
- schedule();
- pr_debug("%s left refrigerator\n", current->comm);
- current->state = save;
+ return todo_this_type;
}

-/* 0 = success, else # of processes that we failed to stop */
-int freeze_processes(void)
+/*
+ * freeze_threads
+ *
+ * Freeze a set of threads.
+ *
+ * Types:
+ * 1: User threads not syncing.
+ * 2: Remaining user threads.
+ * 3: Kernel threads.
+ */
+
+static int freeze_threads(int type)
{
- int todo;
- unsigned long start_time;
- struct task_struct *g, *p;
-
- printk( "Stopping tasks: " );
- start_time = jiffies;
+ struct task_struct *p, *g;
+ unsigned long start_time = jiffies;
+ int result = 0, still_to_do;
+
do {
- todo = 0;
+ int numsignalled = 0;
+
+ preempt_disable();
+
+ local_irq_disable();
+
read_lock(&tasklist_lock);
+
+ /*
+ * Signal the processes.
+ *
+ * We signal them every time through. Otherwise pdflush -
+ * and maybe other processes - might never enter the
+ * fridge.
+ *
+ * NB: We're inside an SMP pause. Our printks are unsafe.
+ * They're only here for debugging.
+ *
+ */
+
do_each_thread(g, p) {
unsigned long flags;
- if (!freezeable(p))
- continue;
- if ((p->flags & PF_FROZEN) ||
- (p->state == TASK_TRACED) ||
- (p->state == TASK_STOPPED))
+ if (!to_be_frozen(p, type))
continue;
-
- /* FIXME: smp problem here: we may not access other process' flags
- without locking */
+
+ numsignalled++;
p->flags |= PF_FREEZE;
spin_lock_irqsave(&p->sighand->siglock, flags);
signal_wake_up(p, 0);
spin_unlock_irqrestore(&p->sighand->siglock, flags);
- todo++;
} while_each_thread(g, p);
+
read_unlock(&tasklist_lock);
- yield(); /* Yield is okay here */
- if (time_after(jiffies, start_time + TIMEOUT)) {
- printk( "\n" );
- printk(KERN_ERR " stopping tasks failed (%d tasks remaining)\n", todo );
- return todo;
- }
- } while(todo);
+
+ preempt_enable();
+
+ local_irq_enable();
+
+ /*
+ * Sleep.
+ */
+ set_task_state(current, TASK_INTERRUPTIBLE);
+ schedule_timeout(FREEZER_CHECK_TIMEOUT);
+
+ still_to_do = num_to_be_frozen(type);
+ } while(still_to_do && !time_after(jiffies, start_time + FREEZER_TOTAL_TIMEOUT));
+
+ /*
+ * Did we time out? See if we failed to freeze processes as well.
+ *
+ */
+ if ((time_after(jiffies, start_time + FREEZER_TOTAL_TIMEOUT)) && (still_to_do)) {
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ if (!to_be_frozen(p, type))
+ continue;
+
+ if (!result) {
+ printk(KERN_ERR "Stopping tasks failed.\n");
+ printk(KERN_ERR "Tasks that refused to be "
+ "refrigerated and haven't since exited:\n");
+ result = 1;
+ }
+
+ if (p->flags & PF_FREEZE) {
+ printk(" - %s (#%d) signalled but "
+ "didn't enter refrigerator.\n",
+ p->comm, p->pid);
+ } else
+ printk(" - %s (#%d) wasn't "
+ "signalled.\n",
+ p->comm, p->pid);
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);
+
+ show_state();
+ }
+
+ return result;
+}
+
+/*
+ * freeze_processes - Freeze processes prior to saving an image of memory.
+ *
+ * Return value: 0 = success, else # of processes that we failed to stop.
+ */
+extern asmlinkage long sys_sync(void);
+
+/* Freeze_processes.
+ * Debugging output is still printed.
+ */
+int freeze_processes(void)
+{
+ int showidlelist, result = 0;
+
+ showidlelist = 1;
+
+ refrigerator_on = 1;
+
+ /* First, freeze all userspace, non syncing threads. */
+ if (freeze_threads(1))
+ goto aborting;

- printk( "|\n" );
- BUG_ON(in_atomic());
- return 0;
+ /* Now freeze processes that were syncing and are still running */
+ if (freeze_threads(2))
+ goto aborting;
+
+ /* Now do our own sync, just in case one wasn't running already */
+ sys_sync();
+
+ sync_freeze = 1;
+
+ /* Freeze kernel threads */
+ if (freeze_threads(3))
+ goto aborting;
+
+out:
+ return result;
+
+aborting:
+ result = -1;
+ thaw_processes();
+ goto out;
}

void thaw_processes(void)
{
- struct task_struct *g, *p;
+ struct task_struct *p, *g;
+
+ sync_freeze = 0;
+ refrigerator_on = 0;
+
+ preempt_disable();
+
+ local_irq_disable();

- printk( "Restarting tasks..." );
read_lock(&tasklist_lock);
+
do_each_thread(g, p) {
- if (!freezeable(p))
- continue;
if (p->flags & PF_FROZEN) {
p->flags &= ~PF_FROZEN;
wake_up_process(p);
- } else
- printk(KERN_INFO " Strange, %s not stopped\n", p->comm );
+ }
} while_each_thread(g, p);

read_unlock(&tasklist_lock);
- schedule();
- printk( " done\n" );
+
+ preempt_enable();
+
+ local_irq_enable();
}

EXPORT_SYMBOL(refrigerator);

[-- Attachment #4: 304-syncthreads --]
[-- Type: text/x-patch, Size: 9093 bytes --]

diff -ruNp 214-syncthreads-old/fs/buffer.c 214-syncthreads-new/fs/buffer.c
--- 214-syncthreads-old/fs/buffer.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/buffer.c 2005-05-02 14:50:03.000000000 +1000
@@ -171,6 +171,10 @@ EXPORT_SYMBOL(sync_blockdev);
*/
int fsync_super(struct super_block *sb)
{
+ int ret;
+
+ current->flags |= PF_SYNCTHREAD;
+
sync_inodes_sb(sb, 0);
DQUOT_SYNC(sb);
lock_super(sb);
@@ -182,7 +186,10 @@ int fsync_super(struct super_block *sb)
sync_blockdev(sb->s_bdev);
sync_inodes_sb(sb, 1);

- return sync_blockdev(sb->s_bdev);
+ ret = sync_blockdev(sb->s_bdev);
+
+ current->flags &= ~PF_SYNCTHREAD;
+ return ret;
}

/*
@@ -193,12 +200,19 @@ int fsync_super(struct super_block *sb)
int fsync_bdev(struct block_device *bdev)
{
struct super_block *sb = get_super(bdev);
+ int ret;
+
+ current->flags |= PF_SYNCTHREAD;
+
if (sb) {
int res = fsync_super(sb);
drop_super(sb);
+ current->flags &= ~PF_SYNCTHREAD;
return res;
}
- return sync_blockdev(bdev);
+ ret = sync_blockdev(bdev);
+ current->flags &= ~PF_SYNCTHREAD;
+ return ret;
}

/**
@@ -278,6 +292,8 @@ EXPORT_SYMBOL(thaw_bdev);
*/
static void do_sync(unsigned long wait)
{
+ current->flags |= PF_SYNCTHREAD;
+
wakeup_bdflush(0);
sync_inodes(0); /* All mappings, inodes and their blockdevs */
DQUOT_SYNC(NULL);
@@ -289,6 +305,8 @@ static void do_sync(unsigned long wait)
printk("Emergency Sync complete\n");
if (unlikely(laptop_mode))
laptop_sync_completion();
+
+ current->flags &= ~PF_SYNCTHREAD;
}

asmlinkage long sys_sync(void)
@@ -314,6 +332,8 @@ int file_fsync(struct file *filp, struct
struct super_block * sb;
int ret, err;

+ current->flags |= PF_SYNCTHREAD;
+
/* sync the inode to buffers */
ret = write_inode_now(inode, 0);

@@ -328,6 +348,8 @@ int file_fsync(struct file *filp, struct
err = sync_blockdev(sb->s_bdev);
if (!ret)
ret = err;
+
+ current->flags &= ~PF_SYNCTHREAD;
return ret;
}

@@ -337,6 +359,8 @@ asmlinkage long sys_fsync(unsigned int f
struct address_space *mapping;
int ret, err;

+ current->flags |= PF_SYNCTHREAD;
+
ret = -EBADF;
file = fget(fd);
if (!file)
@@ -370,6 +394,7 @@ asmlinkage long sys_fsync(unsigned int f
out_putf:
fput(file);
out:
+ current->flags &= ~PF_SYNCTHREAD;
return ret;
}

@@ -379,6 +404,8 @@ asmlinkage long sys_fdatasync(unsigned i
struct address_space *mapping;
int ret, err;

+ current->flags |= PF_SYNCTHREAD;
+
ret = -EBADF;
file = fget(fd);
if (!file)
@@ -405,6 +432,7 @@ asmlinkage long sys_fdatasync(unsigned i
out_putf:
fput(file);
out:
+ current->flags &= ~PF_SYNCTHREAD;
return ret;
}

diff -ruNp 214-syncthreads-old/fs/jbd/journal.c 214-syncthreads-new/fs/jbd/journal.c
--- 214-syncthreads-old/fs/jbd/journal.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/jbd/journal.c 2005-05-02 14:50:03.000000000 +1000
@@ -130,6 +130,7 @@ int kjournald(void *arg)
current_journal = journal;

daemonize("kjournald");
+ current->flags |= PF_SYNCTHREAD;

/* Set up an interval timer which can be used to trigger a
commit wakeup after the commit interval expires */
diff -ruNp 214-syncthreads-old/fs/jffs/intrep.c 214-syncthreads-new/fs/jffs/intrep.c
--- 214-syncthreads-old/fs/jffs/intrep.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/jffs/intrep.c 2005-05-02 14:50:03.000000000 +1000
@@ -3364,6 +3364,7 @@ jffs_garbage_collect_thread(void *ptr)
D1(int i = 1);

daemonize("jffs_gcd");
+ current->flags |= PF_SYNCTHREAD;

c->gc_task = current;

@@ -3399,6 +3400,9 @@ jffs_garbage_collect_thread(void *ptr)
siginfo_t info;
unsigned long signr = 0;

+ if (try_to_freeze(PF_FREEZE))
+ continue;
+
spin_lock_irq(&current->sighand->siglock);
signr = dequeue_signal(current, &current->blocked, &info);
spin_unlock_irq(&current->sighand->siglock);
diff -ruNp 214-syncthreads-old/fs/jfs/jfs_logmgr.c 214-syncthreads-new/fs/jfs/jfs_logmgr.c
--- 214-syncthreads-old/fs/jfs/jfs_logmgr.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/jfs/jfs_logmgr.c 2005-05-02 14:50:03.000000000 +1000
@@ -2321,6 +2321,7 @@ int jfsIOWait(void *arg)
struct lbuf *bp;

daemonize("jfsIO");
+ current->flags |= PF_SYNCTHREAD;

complete(&jfsIOwait);

diff -ruNp 214-syncthreads-old/fs/jfs/jfs_txnmgr.c 214-syncthreads-new/fs/jfs/jfs_txnmgr.c
--- 214-syncthreads-old/fs/jfs/jfs_txnmgr.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/jfs/jfs_txnmgr.c 2005-05-02 14:50:03.000000000 +1000
@@ -47,7 +47,6 @@
#include <linux/vmalloc.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
-#include <linux/suspend.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include "jfs_incore.h"
@@ -2750,6 +2749,7 @@ int jfs_lazycommit(void *arg)
struct jfs_sb_info *sbi;

daemonize("jfsCommit");
+ current->flags |= PF_SYNCTHREAD;

complete(&jfsIOwait);

diff -ruNp 214-syncthreads-old/fs/lockd/clntlock.c 214-syncthreads-new/fs/lockd/clntlock.c
--- 214-syncthreads-old/fs/lockd/clntlock.c 2004-11-03 21:55:00.000000000 +1100
+++ 214-syncthreads-new/fs/lockd/clntlock.c 2005-05-02 14:50:03.000000000 +1000
@@ -200,6 +200,7 @@ reclaimer(void *ptr)
struct inode *inode;

daemonize("%s-reclaim", host->h_name);
+ current->flags |= PF_SYNCTHREAD;
allow_signal(SIGKILL);

/* This one ensures that our parent doesn't terminate while the
@@ -222,6 +223,7 @@ restart:

fl->fl_u.nfs_fl.flags &= ~NFS_LCK_RECLAIM;
nlmclnt_reclaim(host, fl);
+ try_to_freeze(PF_FREEZE);
if (signalled())
break;
goto restart;
diff -ruNp 214-syncthreads-old/fs/lockd/svc.c 214-syncthreads-new/fs/lockd/svc.c
--- 214-syncthreads-old/fs/lockd/svc.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/lockd/svc.c 2005-05-02 14:50:03.000000000 +1000
@@ -115,6 +115,7 @@ lockd(struct svc_rqst *rqstp)
up(&lockd_start);

daemonize("lockd");
+ current->flags |= PF_SYNCTHREAD;

/* Process request with signals blocked, but allow SIGKILL. */
allow_signal(SIGKILL);
@@ -138,6 +139,8 @@ lockd(struct svc_rqst *rqstp)
while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) {
long timeout = MAX_SCHEDULE_TIMEOUT;

+ try_to_freeze(PF_SYNCTHREAD);
+
if (signalled()) {
flush_signals(current);
if (nlmsvc_ops) {
diff -ruNp 214-syncthreads-old/fs/nfsd/nfssvc.c 214-syncthreads-new/fs/nfsd/nfssvc.c
--- 214-syncthreads-old/fs/nfsd/nfssvc.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/nfsd/nfssvc.c 2005-05-02 14:50:03.000000000 +1000
@@ -182,6 +182,7 @@ nfsd(struct svc_rqst *rqstp)
/* Lock module and set up kernel thread */
lock_kernel();
daemonize("nfsd");
+ current->flags |= PF_SYNCTHREAD;

/* After daemonize() this kernel thread shares current->fs
* with the init process. We need to create files with a
diff -ruNp 214-syncthreads-old/fs/xfs/linux-2.6/xfs_buf.c 214-syncthreads-new/fs/xfs/linux-2.6/xfs_buf.c
--- 214-syncthreads-old/fs/xfs/linux-2.6/xfs_buf.c 2005-05-02 15:39:36.000000000 +1000
+++ 214-syncthreads-new/fs/xfs/linux-2.6/xfs_buf.c 2005-05-02 14:50:03.000000000 +1000
@@ -1770,7 +1770,7 @@ pagebuf_daemon(

/* Set up the thread */
daemonize("xfsbufd");
- current->flags |= PF_MEMALLOC;
+ current->flags |= PF_MEMALLOC | PF_SYNCTHREAD;

pagebuf_daemon_task = current;
pagebuf_daemon_active = 1;
diff -ruNp 214-syncthreads-old/fs/xfs/linux-2.6/xfs_super.c 214-syncthreads-new/fs/xfs/linux-2.6/xfs_super.c
--- 214-syncthreads-old/fs/xfs/linux-2.6/xfs_super.c 2005-04-22 23:32:19.000000000 +1000
+++ 214-syncthreads-new/fs/xfs/linux-2.6/xfs_super.c 2005-05-02 14:50:03.000000000 +1000
@@ -471,6 +471,7 @@ xfssyncd(
struct vfs_sync_work *work, *n;

daemonize("xfssyncd");
+ current->flags |= PF_SYNCTHREAD;

vfsp->vfs_sync_work.w_vfs = vfsp;
vfsp->vfs_sync_work.w_syncer = vfs_sync_worker;
diff -ruNp 214-syncthreads-old/include/linux/sched.h 214-syncthreads-new/include/linux/sched.h
--- 214-syncthreads-old/include/linux/sched.h 2005-05-02 15:39:37.000000000 +1000
+++ 214-syncthreads-new/include/linux/sched.h 2005-05-02 15:19:04.000000000 +1000
@@ -788,6 +788,8 @@ do { if (atomic_dec_and_test(&(tsk)->usa
#define PF_SYNCWRITE 0x00200000 /* I am doing a sync write */
#define PF_BORROWED_MM 0x00400000 /* I am a kthread doing use_mm */
#define PF_RANDOMIZE 0x00800000 /* randomize virtual address space */
+#define PF_SYNCTHREAD 0x01000000 /* this thread can start activity during the
++ early part of freezing processes */

/*
* Only the _current_ task can read/write to tsk->flags, but other
diff -ruNp 214-syncthreads-old/mm/pdflush.c 214-syncthreads-new/mm/pdflush.c
--- 214-syncthreads-old/mm/pdflush.c 2005-05-02 15:39:37.000000000 +1000
+++ 214-syncthreads-new/mm/pdflush.c 2005-05-02 14:50:03.000000000 +1000
@@ -89,7 +89,7 @@ struct pdflush_work {

static int __pdflush(struct pdflush_work *my_work)
{
- current->flags |= PF_FLUSHER;
+ current->flags |= (PF_FLUSHER | PF_SYNCTHREAD);
my_work->fn = NULL;
my_work->who = current;
INIT_LIST_HEAD(&my_work->list);