Rafael J. Wysocki 8314418629 Freezer: make kernel threads nonfreezable by default ... Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-07-17 10:23:02 -07:00
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aacraid	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
aic7xxx	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
aic7xxx_old
aic94xx	PCI: Change all drivers to use pci_device->revision	2007-07-11 16:02:10 -07:00
arcmsr	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
arm	[ARM] ecard: add ecardm_iomap() / ecardm_iounmap()	2007-05-11 17:19:02 +01:00
dpt
ibmvscsi	[SCSI] ibmvscsi: convert to use the data buffer accessors	2007-07-15 10:05:33 -05:00
libsas	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
lpfc	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
megaraid	[SCSI] megaraid_mbox: use mutex instead of semaphore	2007-07-14 19:10:19 -05:00
pcmcia	[SCSI] sym53c500_cs: convert to use the data buffer accessors	2007-05-26 19:09:22 -05:00
qla2xxx	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
qla4xxx	[SCSI] qla4xxx: Fix underrun/overrun conditions	2007-07-14 19:11:38 -05:00
sym53c8xx_2	[SCSI] sym53c8xx: convert to use the data buffer accessors	2007-07-15 10:00:32 -05:00
.gitignore
3w-9xxx.c	[SCSI] 3w-9xxx: eliminate missed map_single path	2007-05-31 08:23:02 -05:00
3w-9xxx.h
3w-xxxx.c	[SCSI] 3w-xxxx: convert to use the data buffer accessors	2007-05-30 23:29:32 -05:00
3w-xxxx.h
53c700.c	[SCSI] 53c700: Remove printk, which triggers because of low scsi clock on SNI RMs	2007-07-14 19:12:43 -05:00
53c700.h	[SCSI] 53c700: m68k support for the 53c700 SCSI core	2007-06-17 16:15:56 -05:00
53c700.scr
53c700_d.h_shipped
a100u2w.c	[SCSI] a100u2w: Convert into Linux style	2007-06-17 16:09:29 -05:00
a100u2w.h	[SCSI] a100u2w: Convert into Linux style	2007-06-17 16:09:29 -05:00
a2091.c
a2091.h
a3000.c
a3000.h
a4000t.c	[SCSI] 53c700: Fixup m68k drivers:	2007-06-19 19:53:35 -07:00
advansys.c	[SCSI] advansys: cleanups	2007-05-27 15:05:10 -05:00
aha152x.c	[SCSI] aha152x: use wait_for_completion_timeout	2007-05-22 10:50:19 -05:00
aha152x.h
aha1542.c
aha1542.h
aha1740.c	[SCSI] aha1740: convert to use the data buffer accessors	2007-05-26 19:12:56 -05:00
aha1740.h
aic7xxx_old.c	[SCSI] aic7xxx_old: remove redundant GFP_ATOMIC from kmalloc	2007-07-15 09:34:45 -05:00
atari_dma_emul.c
atari_NCR5380.c	[SCSI] atari_NCR5380: update_timeout removal	2007-06-04 09:55:15 -05:00
atari_scsi.c
atari_scsi.h
atp870u.c
atp870u.h
blz1230.c
blz2060.c
BusLogic.c	[SCSI] BusLogic: convert to use the data buffer accessors	2007-05-26 19:21:37 -05:00
BusLogic.h
bvme6000_scsi.c	[SCSI] 53c700: Fixup m68k drivers:	2007-06-19 19:53:35 -07:00
ch.c
constants.c
cyberstorm.c
cyberstormII.c
dc395x.c	[SCSI] dc395x: convert to use the data buffer accessors	2007-07-15 10:04:49 -05:00
dc395x.h
dec_esp.c
dmx3191d.c
dpt_i2o.c	[SCSI] dpt_i2o: convert to use the data buffer accessors	2007-05-31 12:25:27 -05:00
dpti.h
dtc.c
dtc.h
eata.c	[SCSI] eata: convert to use the data buffer accessors	2007-05-26 19:13:55 -05:00
eata_generic.h
eata_pio.c
eata_pio.h
esp_scsi.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
esp_scsi.h	[SCSI] esp: use shost_priv	2007-05-31 17:30:04 -04:00
fastlane.c
fcal.c
fcal.h
fd_mcs.c
fdomain.c	[SCSI] fdomain: fix PCMCIA-related warnings	2007-05-27 12:59:28 -05:00
fdomain.h
FlashPoint.c
g_NCR5380.c
g_NCR5380.h
g_NCR5380_mmio.c
gdth.c	[SCSI] gdth: Fix obvious typo "spin_lock_irqrestore()"	2007-05-30 08:39:52 -05:00
gdth.h
gdth_ioctl.h
gdth_kcompat.h
gdth_proc.c
gdth_proc.h
gvp11.c
gvp11.h
hosts.c
hptiop.c	[SCSI] hptiop: convert to use the data buffer accessors	2007-06-17 18:35:14 -05:00
hptiop.h
ibmmca.c	[SCSI] ibmmca: convert to use the data buffer accessors	2007-05-26 16:30:17 -05:00
ide-scsi.c	ide-scsi: fix OOPS in idescsi_expiry()	2007-06-16 02:24:44 +02:00
imm.c
imm.h
in2000.c
in2000.h
initio.c	[SCSI] initio: convert to use the data buffer accessors	2007-05-26 19:13:27 -05:00
initio.h	[SCSI] initio: Convert into a real Linux driver and update to modern style	2007-05-22 11:08:56 -05:00
ipr.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
ipr.h
ips.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
ips.h	[SCSI] ips: remove kernel 2.4 code	2007-05-24 09:14:41 -05:00
iscsi_tcp.c	[SCSI] iscsi_tcp: convert to use the data buffer accessors	2007-06-17 16:01:55 -05:00
iscsi_tcp.h	[SCSI] iscsi_tcp: fix handling of data buffer padding	2007-06-02 15:35:10 -04:00
jazz_esp.c	[SCSI] esp: use shost_priv	2007-05-31 17:30:04 -04:00
Kconfig	Introduce CONFIG_VIRT_TO_BUS	2007-07-16 09:05:42 -07:00
lasi700.c
libiscsi.c	[SCSI] iscsi_tcp: convert to use the data buffer accessors	2007-06-17 16:01:55 -05:00
libsrp.c	[SCSI] tgt: fix a rdma indirect transfer error bug	2007-05-16 12:45:17 -04:00
mac53c94.c	[SCSI] mac53c94: convert to use the data buffer accessors	2007-05-26 19:07:50 -05:00
mac53c94.h
mac_esp.c
mac_scsi.c
mac_scsi.h
Makefile	[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA	2007-07-14 19:28:10 -05:00
mca_53c9x.c
megaraid.c	[SCSI] megaraid_old: convert to use the data buffer accessors	2007-05-31 18:11:21 -04:00
megaraid.h
mesh.c	[SCSI] mesh: convert to use the data buffer accessors	2007-06-07 08:49:10 -05:00
mesh.h
mvme16x_scsi.c	[SCSI] 53c700: m68k MVME16x NCR53C710 SCSI	2007-06-17 16:17:40 -05:00
mvme147.c
mvme147.h
ncr53c8xx.c	[SCSI] ncr53c8xx: convert to use the data buffer accessors	2007-07-15 10:03:03 -05:00
ncr53c8xx.h
NCR53C9x.c
NCR53C9x.h
NCR53c406a.c	[SCSI] NCR53c406a: convert to use the data buffer accessors	2007-05-26 19:08:20 -05:00
NCR5380.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
NCR5380.h	[SCSI] ncr5380 warning fixes	2007-05-24 09:13:25 -05:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
nsp32.h
nsp32_debug.c
nsp32_io.h
oktagon_esp.c
oktagon_io.S
osst.c
osst.h
osst_detect.h
osst_options.h
pas16.c
pas16.h
pluto.c	[SCSI] pluto: Use wait_for_completion_timeout.	2007-05-29 02:49:05 -07:00
pluto.h
ppa.c	[SCSI] ppa: coding police and printk levels	2007-07-15 09:36:25 -05:00
ppa.h
psi240i.c
psi240i.h
psi_chip.h
ql1040_fw.h
ql1280_fw.h
ql12160_fw.h
qla1280.c
qla1280.h
qlogicfas.c
qlogicfas408.c	[SCSI] qlogicfas408: convert to use the data buffer accessors	2007-05-26 19:21:09 -05:00
qlogicfas408.h
qlogicpti.c
qlogicpti.h
qlogicpti_asm.c
raid_class.c
script_asm.pl
scsi.c	[SCSI] scsi.c: convert to use the data buffer accessors	2007-07-14 18:57:54 -05:00
scsi.h
scsi_debug.c	[SCSI] scsi_debug: correct parameter default text	2007-06-17 14:56:07 -05:00
scsi_debug.h
scsi_devinfo.c	[SCSI] Add Brownie 1200U3P to blacklist	2007-07-14 18:58:37 -05:00
scsi_error.c	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
scsi_ioctl.c
scsi_lib.c	[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA	2007-07-14 19:28:10 -05:00
scsi_lib_dma.c	[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA	2007-07-14 19:28:10 -05:00
scsi_logging.h
scsi_module.c
scsi_netlink.c
scsi_priv.h
scsi_proc.c
scsi_sas_internal.h
scsi_scan.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-07-15 16:51:54 -07:00
scsi_sysctl.c
scsi_sysfs.c	[SCSI] kill scsi host template suspend/resume	2007-05-22 10:41:12 -05:00
scsi_tgt_if.c
scsi_tgt_lib.c
scsi_tgt_priv.h
scsi_transport_api.h
scsi_transport_fc.c	[SCSI] fc_transport: Check portstates before invoking target scan	2007-06-17 16:03:11 -05:00
scsi_transport_iscsi.c	[SCSI] iscsi class, iscsi_tcp, iser, qla4xxx: add netdevname sysfs attr	2007-06-02 15:38:04 -04:00
scsi_transport_sas.c
scsi_transport_spi.c
scsi_typedefs.h
scsi_wait_scan.c
scsicam.c
sd.c	bsg: add a request_queue argument to scsi_cmd_ioctl()	2007-07-16 08:52:45 +02:00
seagate.c
sg.c	[SCSI] sg: remove unnecessary check	2007-05-28 09:08:32 -05:00
sgiwd93.c	Convert SGI IP22 and specific drivers to platform_device.	2007-05-11 17:00:29 +01:00
sim710.c
sni_53c710.c	[SCSI] sni_53c710: Cleanup	2007-07-14 19:12:15 -05:00
sr.c	[SCSI] sr: fix error handling in module_init	2007-07-14 18:54:34 -05:00
sr.h
sr_ioctl.c
sr_vendor.c
st.c	bsg: add a request_queue argument to scsi_cmd_ioctl()	2007-07-16 08:52:45 +02:00
st.h
st_options.h
stex.c	[SCSI] stex: use resid for xfer len information	2007-07-14 18:59:10 -05:00
sun3_NCR5380.c
sun3_scsi.c
sun3_scsi.h
sun3_scsi_vme.c
sun3x_esp.c
sun_esp.c	[SCSI] esp: use shost_priv	2007-05-31 17:30:04 -04:00
sym53c416.c	[SCSI] sym53c416: convert to use the data buffer accessors	2007-05-26 19:08:50 -05:00
sym53c416.h
t128.c
t128.h
tmscsim.c	[SCSI] tmscsim: Further clean-up of the driver	2007-07-14 18:56:33 -05:00
tmscsim.h	[SCSI] tmscsim: Further clean-up of the driver	2007-07-14 18:56:33 -05:00
u14-34f.c	[SCSI] u14-34f: convert to use the data buffer accessors	2007-05-26 19:19:04 -05:00
ultrastor.c	[SCSI] ultrastor: convert to use the data buffer accessors	2007-05-26 19:18:38 -05:00
ultrastor.h
wd33c93.c
wd33c93.h
wd7000.c	[SCSI] wd7000: convert to use the data buffer accessors	2007-05-26 19:18:10 -05:00
zalon.c
zorro7xx.c	[SCSI] 53c700: Fixup m68k drivers:	2007-06-19 19:53:35 -07:00