diff options
Diffstat (limited to 'erts/emulator/beam/erl_process.h')
| -rw-r--r-- | erts/emulator/beam/erl_process.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h index b80aa12872..41b367435d 100644 --- a/erts/emulator/beam/erl_process.h +++ b/erts/emulator/beam/erl_process.h @@ -1288,10 +1288,22 @@ extern struct erts_system_profile_flags_t erts_system_profile_flags; #define F_HAVE_BLCKD_MSCHED (1 << 8) /* Process has blocked multi-scheduling */ #define F_P2PNR_RESCHED (1 << 9) /* Process has been rescheduled via erts_pid2proc_not_running() */ #define F_FORCE_GC (1 << 10) /* Force gc at process in-scheduling */ -#define F_DISABLE_GC (1 << 11) /* Disable GC */ +#define F_DISABLE_GC (1 << 11) /* Disable GC (see below) */ #define F_OFF_HEAP_MSGQ (1 << 12) /* Off heap msg queue */ #define F_OFF_HEAP_MSGQ_CHNG (1 << 13) /* Off heap msg queue changing */ #define F_ABANDONED_HEAP_USE (1 << 14) /* Have usage of abandoned heap */ +#define F_DELAY_GC (1 << 15) /* Similar to disable GC (see below) */ + +/* + * F_DISABLE_GC and F_DELAY_GC are similar. Both will prevent + * GC of the process, but it is important to use the right + * one: + * - F_DISABLE_GC should *only* be used by BIFs. This when + * the BIF needs to yield while preventig a GC. + * - F_DELAY_GC should only be used when GC is temporarily + * disabled while the process is scheduled. A process must + * not be scheduled out while F_DELAY_GC is set. + */ /* process trace_flags */ #define F_SENSITIVE (1 << 0) |