| /Linux-v6.6/kernel/cgroup/ |
| D | freezer.c | 12 * Propagate the cgroup frozen state upwards by the cgroup tree.
14 static void cgroup_propagate_frozen(struct cgroup *cgrp, bool frozen) in cgroup_propagate_frozen() argument
19 * If the new state is frozen, some freezing ancestor cgroups may change in cgroup_propagate_frozen()
20 * their state too, depending on if all their descendants are frozen. in cgroup_propagate_frozen()
22 * Otherwise, all ancestor cgroups are forced into the non-frozen state. in cgroup_propagate_frozen()
25 if (frozen) { in cgroup_propagate_frozen()
49 * Revisit the cgroup frozen state.
50 * Checks if the cgroup is really frozen and perform all state transitions.
54 bool frozen; in cgroup_update_frozen() local
59 * If the cgroup has to be frozen (CGRP_FREEZE bit set), in cgroup_update_frozen()
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| D | legacy_freezer.c | 29 * set if "FROZEN" is written to freezer.state cgroupfs file, and cleared
38 CGROUP_FROZEN = (1 << 3), /* this and its descendants frozen */
80 return "FROZEN"; in freezer_state_strs()
172 * For simplicity, when migrating any task to a FROZEN cgroup, we in freezer_attach()
177 * current state before executing the following - !frozen tasks may in freezer_attach()
178 * be visible in a FROZEN cgroup and frozen tasks in a THAWED one. in freezer_attach()
188 /* clear FROZEN and propagate upwards */ in freezer_attach()
238 * Once FREEZING is initiated, transition to FROZEN is lazily updated by
239 * calling this function. If the current state is FREEZING but not FROZEN,
241 * cgroups finished freezing and, if so, sets FROZEN.
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| /Linux-v6.6/Documentation/admin-guide/cgroup-v1/ |
| D | freezer-subsystem.rst | 53 being frozen. This allows the bash example above and gdb to run as
67 "FREEZING" or "FROZEN". This is the combined self and parent-states.
68 If any is freezing, the cgroup is freezing (FREEZING or FROZEN).
70 FREEZING cgroup transitions into FROZEN state when all tasks
71 belonging to the cgroup and its descendants become frozen. Note that
72 a cgroup reverts to FREEZING from FROZEN after a new task is added
74 frozen.
77 allowed - "FROZEN" and "THAWED". If FROZEN is written, the cgroup,
90 This value is 1 iff the last write to freezer.state was "FROZEN".
95 frozen; otherwise, 1.
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| /Linux-v6.6/tools/testing/selftests/cgroup/ |
| D | test_freezer.c | 25 * Check if the cgroup is frozen by looking at the cgroup.events::frozen value.
27 static int cg_check_frozen(const char *cgroup, bool frozen) in cg_check_frozen() argument
29 if (frozen) { in cg_check_frozen()
30 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 1") != 0) { in cg_check_frozen()
31 debug("Cgroup %s isn't frozen\n", cgroup); in cg_check_frozen()
36 * Check the cgroup.events::frozen value. in cg_check_frozen()
38 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 0") != 0) { in cg_check_frozen()
39 debug("Cgroup %s is frozen\n", cgroup); in cg_check_frozen()
56 * Attach a task to the given cgroup and wait for a cgroup frozen event.
60 bool frozen) in cg_enter_and_wait_for_frozen() argument
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| /Linux-v6.6/kernel/ |
| D | freezer.c | 26 /* protects freezing and frozen transitions */
30 * freezing_slow_path - slow path for testing whether a task needs to be frozen
34 * and tests whether @p needs to enter and stay in frozen state. Can be
56 bool frozen(struct task_struct *p) in frozen() function
61 /* Refrigerator is place where frozen processes are stored :-). */
151 * %false, if @p is not freezing or already frozen; %true, otherwise
158 if (!freezing(p) || frozen(p) || __freeze_task(p)) { in freeze_task()
226 * freezer notices that we aren't frozen yet or the freezing in set_freezable()
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| /Linux-v6.6/kernel/power/ |
| D | user.c | 35 bool frozen; member
96 data->frozen = false; in snapshot_open()
118 if (data->frozen) { in snapshot_release()
278 if (data->frozen) in snapshot_ioctl()
291 data->frozen = true; in snapshot_ioctl()
296 if (!data->frozen || data->ready) in snapshot_ioctl()
302 data->frozen = false; in snapshot_ioctl()
306 if (data->mode != O_RDONLY || !data->frozen || data->ready) { in snapshot_ioctl()
321 if (data->mode != O_WRONLY || !data->frozen || in snapshot_ioctl()
387 if (!data->frozen) { in snapshot_ioctl()
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| D | process.c | 101 if (p != current && freezing(p) && !frozen(p)) in try_to_freeze_tasks()
116 * The current thread will not be frozen. The same process that calls
129 /* Make sure this task doesn't get frozen */ in freeze_processes()
144 * Now that the whole userspace is frozen we need to disable in freeze_processes()
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| /Linux-v6.6/Documentation/power/ |
| D | freezing-of-tasks.rst | 34 'frozen' and therefore the set of functions handling this mechanism is referred
37 frozen before kernel threads.
41 if the task is to be frozen and makes the task enter __refrigerator().
47 that combine interruptible sleep with checking if the task is to be frozen and
69 order to clear the PF_FROZEN flag for each frozen task. Then, the tasks that
70 have been frozen leave __refrigerator() and continue running.
156 be frozen before the driver's .suspend() callback is executed and it will be
168 if this process is not frozen, it may notice that the number of CPUs has
179 and B is frozen in the meantime, then A will be blocked until B is thawed, which
200 fail, because the user land process that should respond to the request is frozen
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| D | userland-swsusp.rst | 38 not frozen); this is required for SNAPSHOT_CREATE_IMAGE
42 thaw user space processes frozen by SNAPSHOT_FREEZE
133 unfreeze user space processes frozen by SNAPSHOT_UNFREEZE if they are
134 still frozen when the device is being closed).
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| D | suspend-and-cpuhotplug.rst | 157 argument. But during suspend, since the tasks are already frozen by the time
267 tasks could have been frozen by an out-of-band event such as a suspend
269 reflect the frozen state and the CPU hotplug callbacks which evaluate
280 it will now start waiting on the frozen userspace in the
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| /Linux-v6.6/fs/xfs/scrub/ |
| D | fscounters.c | 59 bool frozen; member
183 fsc->frozen = true; in xchk_fscounters_freeze()
196 if (!fsc->frozen) in xchk_fscounters_cleanup()
201 xfs_emerg(sc->mp, "still frozen after scrub, err=%d", error); in xchk_fscounters_cleanup()
203 fsc->frozen = false; in xchk_fscounters_cleanup()
518 * If the filesystem is not frozen, the counter summation calls above in xchk_fscounters()
527 if (!fsc->frozen) in xchk_fscounters()
567 * frozen, we treat the discrepancy as a corruption because the freeze in xchk_fscounters()
573 if (fsc->frozen) in xchk_fscounters()
580 if (fsc->frozen) in xchk_fscounters()
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| /Linux-v6.6/fs/ |
| D | super.c | 1089 if (sb->s_writers.frozen != SB_UNFROZEN) in reconfigure_super()
1113 if (sb->s_writers.frozen != SB_UNFROZEN) in reconfigure_super()
1229 * emergency_thaw_all -- forcibly thaw every frozen filesystem
1506 * It is enough to check bdev was not frozen before we set s_bdev. in setup_bdev_super()
1512 warnf(fc, "%pg: Can't mount, blockdev is frozen", bdev); in setup_bdev_super()
1883 unsigned short old = sb->s_writers.frozen; in wait_for_partially_frozen()
1886 ret = wait_var_event_killable(&sb->s_writers.frozen, in wait_for_partially_frozen()
1887 sb->s_writers.frozen != old); in wait_for_partially_frozen()
1890 sb->s_writers.frozen != SB_UNFROZEN && in wait_for_partially_frozen()
1891 sb->s_writers.frozen != SB_FREEZE_COMPLETE); in wait_for_partially_frozen()
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| /Linux-v6.6/include/trace/events/ |
| D | mptcp.h | 83 __field(u8, frozen)
102 __entry->frozen = mpext->frozen;
109 …u csum=%x use_map=%u dsn64=%u data_fin=%u use_ack=%u ack64=%u mpc_map=%u frozen=%u reset_transient…
115 __entry->mpc_map, __entry->frozen,
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| /Linux-v6.6/include/linux/ |
| D | freezer.h | 25 * Check if a process has been frozen
27 extern bool frozen(struct task_struct *p);
74 static inline bool frozen(struct task_struct *p) { return false; } in frozen() function
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| D | journal-head.h | 56 * Copy of the buffer data frozen for writing to the log.
110 /* Trigger type for the committing transaction's frozen data */
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| /Linux-v6.6/arch/powerpc/platforms/powernv/ |
| D | eeh-powernv.c | 156 * to clear frozen PE during PCI config access. in pnv_eeh_enable_phbs()
395 * the PE becomes frozen for the first time and the flag has in pnv_eeh_probe()
547 * Check PHB state. If the PHB is frozen for the in pnv_eeh_get_phb_state()
575 * We don't clobber hardware frozen state until PE in pnv_eeh_get_pe_state()
647 * If the PE is switching to frozen state for the in pnv_eeh_get_pe_state()
1048 * frozen state during PE reset. However, the good idea here from in pnv_eeh_reset()
1049 * benh is to keep frozen state before we get PE reset done completely in pnv_eeh_reset()
1050 * (until BAR restore). With the frozen state, HW drops illegal IO in pnv_eeh_reset()
1051 * or MMIO access, which can incur recursive frozen PE during PE in pnv_eeh_reset()
1052 * reset. The side effect is that EEH core has to clear the frozen in pnv_eeh_reset()
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| /Linux-v6.6/Documentation/driver-api/pm/ |
| D | notifiers.rst | 22 processes are frozen at these points). The solution may be to load the firmware
23 into memory before processes are frozen and upload it from there in the
30 The system is going to hibernate, tasks will be frozen immediately. This
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| /Linux-v6.6/Documentation/admin-guide/pm/ |
| D | suspend-flows.rst | 58 Tasks are frozen primarily in order to avoid unchecked hardware accesses
68 The kernel threads that choose to be frozen during system suspend for
69 specific reasons are frozen subsequently, but they are not intercepted.
71 to be frozen and to put themselves into uninterruptible sleep if so. [Note,
152 Tasks frozen in step 2 of the preceding `suspend <s2idle_suspend_>`_
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| /Linux-v6.6/arch/powerpc/kernel/ |
| D | eeh_driver.c | 332 eeh_edev_info(edev, "Invoking %s->error_detected(IO frozen)", in eeh_report_error()
551 * Explicitly clear PE's frozen state for PowerNV where
552 * we have frozen PE until BAR restore is completed. It's
554 * PE reset (for 3 times), we try to clear the frozen state
674 /* Clear frozen state */ in eeh_reset_device()
754 * the upstream bridge is also frozen, or the bridge is part of the same PE
823 * slot, the associated PE will be frozen. Besides, DMA's occurring
868 pr_debug("EEH: Frozen PHB#%x-PE#%x is empty!\n", in eeh_handle_normal_event()
895 pr_err("EEH: Frozen PHB#%x-PE#%x detected\n", in eeh_handle_normal_event()
936 eeh_pe_report("error_detected(IO frozen)", pe, in eeh_handle_normal_event()
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| D | eeh.c | 95 * EEH allowed maximal frozen times. If one particular PE's
96 * frozen count in last hour exceeds this limit, the PE will
318 * when their PEs are in frozen state. Otherwise, fenced in eeh_slot_error_detail()
354 * For that case, it's meaningless to recover frozen PE. Intead,
464 * been frozen. in eeh_dev_check_failure()
520 * put into frozen state as well. We should take care in eeh_dev_check_failure()
529 /* Frozen parent PE ? */ in eeh_dev_check_failure()
555 pr_debug("EEH: %s: Frozen PHB#%x-PE#%x detected\n", in eeh_dev_check_failure()
602 * This routine should be called to reenable frozen MMIO or DMA
1158 /* Frozen PE, check if it needs PE level reset */ in eeh_pe_change_owner()
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| /Linux-v6.6/tools/testing/selftests/powerpc/pmu/ebb/ |
| D | back_to_back_ebbs_test.c | 24 * counter frozen once we've taken enough EBBs.
45 /* Reset but leave counters frozen */ in ebb_callee()
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| D | cycles_with_freeze_test.c | 43 trace_log_string(ebb_state.trace, "frozen"); in ebb_callee()
104 printf("EBBs while frozen %d\n", ebbs_while_frozen); in cycles_with_freeze()
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| /Linux-v6.6/Documentation/riscv/ |
| D | patch-acceptance.rst | 42 specifications from the RISC-V foundation this means "Frozen" or
54 - Have been officially frozen or ratified by the RISC-V Foundation, or
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| /Linux-v6.6/arch/ia64/kernel/ |
| D | crash.c | 109 * be frozen and INIT might be masked on monarch. In this case, in machine_crash_shutdown()
110 * all slaves will be frozen soon since kdump_in_progress will let in machine_crash_shutdown()
115 * be frozen soon with no wait since the INIT rendezvous is skipped in machine_crash_shutdown()
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| /Linux-v6.6/include/uapi/linux/android/ |
| D | binder.h | 229 /* process received sync transactions since last frozen
230 * bit 0: received sync transaction after being frozen
235 /* process received async transactions since last frozen */
454 * a bcATTEMPT_ACQUIRE) is frozen. No parameters.
466 * The target of the last async transaction is frozen. No parameters.
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