class DiscardableVmoTracker
Defined at line 18 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
Tracks state relevant for discardable VMOs. This class offers separation of the logic required
for discardable VMO management; the members are still protected by the owning VmCowPages' lock.
Public Methods
void DiscardableVmoTracker ()Defined at line 22 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
void ~DiscardableVmoTracker ()Defined at line 23 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
void InitCowPages (VmCowPages * cow)Defined at line 25 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
void RemoveFromDiscardableListLocked ()Remove a discardable object from whichever global discardable list it is in. Called from the
VmCowPages destructor. Also resets the cow_ back reference.
Defined at line 118 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
ktl::pair<zx_status_t, bool> LockDiscardableLocked (bool try_lock, bool * was_discarded_out)Lock and unlock functions. Returns ZX_OK if the operation succeeded or an error code if it
failed, along with whether the VMO was moved between the discardable reclaimable and
non-reclaimable lists. The intent of this is to inform the caller if they might need to update
any book-keeping depending on whether the VMO becomes reclaimable or unreclaimable.
Defined at line 18 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
ktl::pair<zx_status_t, bool> UnlockDiscardableLocked ()Defined at line 41 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
bool WasDiscardedLocked ()Whether the VMO has been discarded and not locked again yet.
Defined at line 58 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
void SetDiscardedLocked ()Mark the VMO as discarded.
Defined at line 63 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
DiscardableState discardable_state_locked ()Accessors for private members.
Defined at line 75 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
uint64_t DebugGetLockCount ()Debug functions exposed for testing.
Defined at line 80 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
void assert_cow_pages_locked ()Helper to assert that the owning cow_'s lock is held on code paths where thread annotations
cannot express the locking requirements.
Defined at line 90 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h
bool IsEligibleForReclamationLocked ()Returns whether this object qualifies for reclamation based on whether its state is
kReclaimable.
Defined at line 221 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
DiscardablePageCounts DebugDiscardablePageCounts ()static
Defined at line 235 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
bool DebugIsReclaimable ()Defined at line 197 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
bool DebugIsUnreclaimable ()Defined at line 205 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
bool DebugIsDiscarded ()Defined at line 213 of file ../../zircon/kernel/vm/discardable_vmo_tracker.cc
Enumerations
enum DiscardableState| Name | Value |
|---|---|
| kUnset | 0 |
| kReclaimable | 1 |
| kUnreclaimable | 2 |
| kDiscarded | 3 |
See comment near discardable_state_ for details.
Defined at line 33 of file ../../zircon/kernel/vm/include/vm/discardable_vmo_tracker.h