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Message-ID: <20070402054253.GH12962@in.ibm.com>
Date: Mon, 2 Apr 2007 11:12:53 +0530
From: Gautham R Shenoy <ego@...ibm.com>
To: akpm@...ux-foundation.org, paulmck@...ibm.com,
torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, vatsa@...ibm.com,
Oleg Nesterov <oleg@...sign.ru>,
"Rafael J. Wysocki" <rjw@...k.pl>, mingo@...e.hu,
dipankar@...ibm.com, dino@...ibm.com,
masami.hiramatsu.pt@...achi.com
Subject: [PATCH 8/8] Make kernel threads freezeable for cpu-hotplug
This patch makes all the kernel_threads (except the migration thread)
freezeable for cpu hotplug.
Signed-off-by: Gautham R Shenoy <ego@...ibm.com>
--
arch/i386/kernel/apm.c | 2 +-
drivers/block/loop.c | 2 +-
drivers/char/apm-emulation.c | 6 +++---
drivers/ieee1394/ieee1394_core.c | 2 +-
drivers/md/md.c | 2 +-
drivers/mmc/card/queue.c | 2 +-
drivers/mtd/mtd_blkdevs.c | 2 +-
drivers/scsi/libsas/sas_scsi_host.c | 2 +-
drivers/scsi/scsi_error.c | 2 +-
drivers/usb/storage/usb.c | 2 +-
10 files changed, 12 insertions(+), 12 deletions(-)
Index: linux-2.6.21-rc5/arch/i386/kernel/apm.c
===================================================================
--- linux-2.6.21-rc5.orig/arch/i386/kernel/apm.c
+++ linux-2.6.21-rc5/arch/i386/kernel/apm.c
@@ -1395,7 +1395,7 @@ static void apm_mainloop(void)
add_wait_queue(&apm_waitqueue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
for (;;) {
try_to_freeze();
schedule_timeout(APM_CHECK_TIMEOUT);
Index: linux-2.6.21-rc5/drivers/block/loop.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/block/loop.c
+++ linux-2.6.21-rc5/drivers/block/loop.c
@@ -587,7 +587,7 @@ static int loop_thread(void *data)
* hence, it mustn't be stopped at all
* because it could be indirectly used during suspension
*/
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
set_user_nice(current, -20);
Index: linux-2.6.21-rc5/drivers/char/apm-emulation.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/char/apm-emulation.c
+++ linux-2.6.21-rc5/drivers/char/apm-emulation.c
@@ -336,7 +336,7 @@ apm_ioctl(struct inode * inode, struct f
* threads.
*/
flags = current->flags;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
wait_event(apm_suspend_waitqueue,
as->suspend_state == SUSPEND_DONE);
@@ -372,7 +372,7 @@ apm_ioctl(struct inode * inode, struct f
* threads.
*/
flags = current->flags;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
wait_event_interruptible(apm_suspend_waitqueue,
as->suspend_state == SUSPEND_DONE);
@@ -536,7 +536,7 @@ static int apm_get_info(char *buf, char
static int kapmd(void *arg)
{
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
do {
apm_event_t event;
int ret;
Index: linux-2.6.21-rc5/drivers/ieee1394/ieee1394_core.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/ieee1394/ieee1394_core.c
+++ linux-2.6.21-rc5/drivers/ieee1394/ieee1394_core.c
@@ -1134,7 +1134,7 @@ static int hpsbpkt_thread(void *__hi)
struct list_head tmp;
int may_schedule;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
while (!kthread_should_stop()) {
Index: linux-2.6.21-rc5/drivers/md/md.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/md/md.c
+++ linux-2.6.21-rc5/drivers/md/md.c
@@ -4527,7 +4527,7 @@ static int md_thread(void * arg)
* many dirty RAID5 blocks.
*/
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
allow_signal(SIGKILL);
while (!kthread_should_stop()) {
Index: linux-2.6.21-rc5/drivers/mtd/mtd_blkdevs.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/mtd/mtd_blkdevs.c
+++ linux-2.6.21-rc5/drivers/mtd/mtd_blkdevs.c
@@ -83,7 +83,7 @@ static int mtd_blktrans_thread(void *arg
/* we might get involved when memory gets low, so use PF_MEMALLOC */
current->flags |= PF_MEMALLOC;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
daemonize("%sd", tr->name);
Index: linux-2.6.21-rc5/drivers/scsi/libsas/sas_scsi_host.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/scsi/libsas/sas_scsi_host.c
+++ linux-2.6.21-rc5/drivers/scsi/libsas/sas_scsi_host.c
@@ -871,7 +871,7 @@ static int sas_queue_thread(void *_sas_h
struct scsi_core *core = &sas_ha->core;
daemonize("sas_queue_%d", core->shost->host_no);
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
complete(&queue_th_comp);
Index: linux-2.6.21-rc5/drivers/scsi/scsi_error.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/scsi/scsi_error.c
+++ linux-2.6.21-rc5/drivers/scsi/scsi_error.c
@@ -1536,7 +1536,7 @@ int scsi_error_handler(void *data)
{
struct Scsi_Host *shost = data;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
/*
* We use TASK_INTERRUPTIBLE so that the thread is not
Index: linux-2.6.21-rc5/drivers/usb/storage/usb.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/usb/storage/usb.c
+++ linux-2.6.21-rc5/drivers/usb/storage/usb.c
@@ -301,7 +301,7 @@ static int usb_stor_control_thread(void
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
for(;;) {
try_to_freeze();
Index: linux-2.6.21-rc5/drivers/mmc/card/queue.c
===================================================================
--- linux-2.6.21-rc5.orig/drivers/mmc/card/queue.c
+++ linux-2.6.21-rc5/drivers/mmc/card/queue.c
@@ -67,7 +67,7 @@ static int mmc_queue_thread(void *d)
* the process freezing. We handle suspension ourselves.
*/
current->flags |= PF_MEMALLOC;
- freezer_exempt(FE_ALL);
+ freezer_exempt(FE_SUSPEND_KPROBES);
down(&mq->thread_sem);
do {
--
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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