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/linux/kernel/cgroup/
H A Dlegacy_freezer.c2 * cgroup_freezer.c - control group freezer subsystem
22 #include <linux/freezer.h>
29 * set if "FROZEN" is written to freezer.state cgroupfs file, and cleared
30 * for "THAWED". FREEZING_PARENT is set if the parent freezer is FREEZING
35 CGROUP_FREEZER_ONLINE = (1 << 0), /* freezer is fully online */
36 CGROUP_FREEZING_SELF = (1 << 1), /* this freezer is freezing */
37 CGROUP_FREEZING_PARENT = (1 << 2), /* the parent freezer is freezing */
44 struct freezer { struct
51 static inline struct freezer *css_freezer(struct cgroup_subsys_state *css) in css_freezer() argument
53 return css ? container_of(css, struct freezer, cs in css_freezer()
61 parent_freezer(struct freezer * freezer) parent_freezer() argument
89 struct freezer *freezer; freezer_css_alloc() local
107 struct freezer *freezer = css_freezer(css); freezer_css_online() local
134 struct freezer *freezer = css_freezer(css); freezer_css_offline() local
180 struct freezer *freezer = css_freezer(new_css); freezer_attach() local
209 struct freezer *freezer; freezer_fork() local
250 struct freezer *freezer = css_freezer(css); update_if_frozen() local
314 freeze_cgroup(struct freezer * freezer) freeze_cgroup() argument
325 unfreeze_cgroup(struct freezer * freezer) unfreeze_cgroup() argument
345 freezer_apply_state(struct freezer * freezer,bool freeze,unsigned int state) freezer_apply_state() argument
381 freezer_change_state(struct freezer * freezer,bool freeze) freezer_change_state() argument
440 struct freezer *freezer = css_freezer(css); freezer_self_freezing_read() local
448 struct freezer *freezer = css_freezer(css); freezer_parent_freezing_read() local
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H A Dfreezer.c48 cgrp->freezer.nr_frozen_descendants += desc; in cgroup_propagate_frozen()
50 (cgrp->freezer.nr_frozen_descendants != in cgroup_propagate_frozen()
54 cgrp->freezer.nr_frozen_descendants -= desc; in cgroup_propagate_frozen()
76 cgrp->freezer.nr_frozen_tasks == __cgroup_task_count(cgrp); in cgroup_update_frozen()
88 cgrp->freezer.nr_frozen_tasks++; in cgroup_inc_frozen_cnt()
96 cgrp->freezer.nr_frozen_tasks--; in cgroup_dec_frozen_cnt()
97 WARN_ON_ONCE(cgrp->freezer.nr_frozen_tasks < 0); in cgroup_dec_frozen_cnt()
210 if (cgrp->nr_descendants == cgrp->freezer.nr_frozen_descendants) in cgroup_do_freeze()
270 if (cgrp->freezer.freeze == freeze) in cgroup_freeze()
273 cgrp->freezer in cgroup_freeze()
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H A DMakefile2 obj-y := cgroup.o rstat.o namespace.o cgroup-v1.o freezer.o
H A Dcgroup.c4028 seq_printf(seq, "%d\n", cgrp->freezer.freeze); in cgroup_freeze_show()
5765 cgrp->freezer.e_freeze = parent->freezer.e_freeze; in cgroup_create()
5766 if (cgrp->freezer.e_freeze) { in cgroup_create()
5803 if (cgrp->freezer.e_freeze) in cgroup_create()
5804 tcgrp->freezer.nr_frozen_descendants++; in cgroup_create()
6077 tcgrp->freezer.nr_frozen_descendants--; in cgroup_destroy_locked()
/linux/Documentation/admin-guide/cgroup-v1/
H A Dfreezer-subsystem.rst5 The cgroup freezer is useful to batch job management system which start
9 whole. The cgroup freezer uses cgroups to describe the set of tasks to
13 The cgroup freezer will also be useful for checkpointing running groups
14 of tasks. The freezer allows the checkpoint code to obtain a consistent
51 In contrast, the cgroup freezer uses the kernel freezer code to
56 The cgroup freezer is hierarchical. Freezing a cgroup freezes all
62 The following cgroupfs files are created by cgroup freezer.
64 * freezer.state: Read-write.
87 * freezer
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H A Dindex.rst16 freezer-subsystem
/linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/
H A Dbcmsdh.c797 sdiodev->freezer = kzalloc(sizeof(*sdiodev->freezer), GFP_KERNEL); in brcmf_sdiod_freezer_attach()
798 if (!sdiodev->freezer) in brcmf_sdiod_freezer_attach()
800 atomic_set(&sdiodev->freezer->thread_count, 0); in brcmf_sdiod_freezer_attach()
801 atomic_set(&sdiodev->freezer->freezing, 0); in brcmf_sdiod_freezer_attach()
802 init_waitqueue_head(&sdiodev->freezer->thread_freeze); in brcmf_sdiod_freezer_attach()
803 init_completion(&sdiodev->freezer->resumed); in brcmf_sdiod_freezer_attach()
809 if (sdiodev->freezer) { in brcmf_sdiod_freezer_detach()
810 WARN_ON(atomic_read(&sdiodev->freezer->freezing)); in brcmf_sdiod_freezer_detach()
811 kfree(sdiodev->freezer); in brcmf_sdiod_freezer_detach()
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H A Dsdio.h194 struct brcmf_sdiod_freezer *freezer; member
/linux/Documentation/power/
H A Dfreezing-of-tasks.rst33 in kernel/freezer.c), which changes the task's state to TASK_FROZEN, and makes
36 referred to as 'the freezer' (these functions are defined in
37 kernel/power/process.c, kernel/freezer.c & include/linux/freezer.h). User space
41 try_to_freeze() function (defined in include/linux/freezer.h), that checks
71 If a freezable kernel thread is not put to the frozen state after the freezer
241 consequence, the freezer would not be able to freeze that task, leading to
245 since they ask the freezer to skip freezing this task, since it is anyway
H A Dsuspend-and-cpuhotplug.rst17 interactions involving the freezer and CPU hotplug and also tries to explain
272 2. If a regular CPU hotplug stress test happens to race with the freezer due
278 * Then freezer gets to work and freezes userspace.
282 * Now the freezer continues and tries to freeze the remaining tasks. But
283 due to this wait mentioned above, the freezer won't be able to freeze
H A Dbasic-pm-debugging.rst52 freezer
105 should try the test modes starting from "freezer", through "devices", "platform"
109 If the "freezer" test fails, there is a task that cannot be frozen (in that case
112 that there is a problem with the tasks freezer subsystem that should be
224 Namely, after writing "freezer", "devices", "platform", "processors", or "core"
/linux/include/linux/
H A Dcgroup_subsys.h37 SUBSYS(freezer)
H A Dcgroup-defs.h587 /* Used to store internal freezer state */
588 struct cgroup_freezer_state freezer; member
/linux/
H A DKconfig12 source "kernel/Kconfig.freezer"
H A DMAINTAINERS9943 F: include/linux/freezer.h
9944 F: kernel/freezer.c
10822 F: include/linux/freezer.h
24311 F: include/linux/freezer.h
/linux/kernel/
H A DMakefile61 obj-$(CONFIG_FREEZER) += freezer.o
/linux/kernel/power/
H A DKconfig12 bool "Enable freezer for suspend to RAM/standby" \
17 This allows you to turn off the freezer for suspend. If this is