order.txt
text/plain
Filename: order.txt
Type: text/plain
Part: 0
commit ea3aded2c4dec487c8a2ff5470cd7bae83e8dd47
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Date: Tue Feb 10 18:54:29 2026 +0000
reorder
diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h
index 53acce8a5a1..5d41301c966 100644
--- a/src/include/storage/proc.h
+++ b/src/include/storage/proc.h
@@ -184,29 +184,16 @@ typedef enum
*/
typedef struct PGPROC
{
- dlist_node links; /* list link if process is in a list */
- dlist_head *procgloballist; /* procglobal list that owns this PGPROC */
-
- PGSemaphore sem; /* ONE semaphore to sleep on */
- ProcWaitStatus waitStatus;
-
- Latch procLatch; /* generic latch for process */
-
-
- TransactionId xid; /* id of top-level transaction currently being
- * executed by this proc, if running and XID
- * is assigned; else InvalidTransactionId.
- * mirrored in ProcGlobal->xids[pgxactoff] */
-
- TransactionId xmin; /* minimal running XID as it was when we were
- * starting our xact, excluding LAZY VACUUM:
- * vacuum must not remove tuples deleted by
- * xid >= xmin ! */
-
int pid; /* Backend's process ID; 0 if prepared xact */
-
int pgxactoff; /* offset into various ProcGlobal->arrays with
* data mirrored from this PGPROC */
+ BackendType backendType; /* what kind of process is this? */
+
+ /* These fields are zero while a backend is still starting up: */
+ Oid databaseId; /* OID of database this backend is using */
+ Oid roleId; /* OID of role using this backend */
+ Oid tempNamespaceId; /* OID of temp schema this backend is
+ * using */
/*
* Currently running top-level transaction's virtual xid. Together these
@@ -227,24 +214,44 @@ typedef struct PGPROC
* InvalidLocalTransactionId */
} vxid;
- /* These fields are zero while a backend is still starting up: */
- Oid databaseId; /* OID of database this backend is using */
- Oid roleId; /* OID of role using this backend */
+ dlist_node links; /* list link if process is in a list */
+ dlist_head *procgloballist; /* procglobal list that owns this PGPROC */
- Oid tempNamespaceId; /* OID of temp schema this backend is
- * using */
+ uint32 wait_event_info; /* proc's wait information */
+ pg_atomic_uint64 waitStart; /* time at which wait for lock acquisition
+ * started */
- BackendType backendType; /* what kind of process is this? */
+ TransactionId xid; /* id of top-level transaction currently being
+ * executed by this proc, if running and XID
+ * is assigned; else InvalidTransactionId.
+ * mirrored in ProcGlobal->xids[pgxactoff] */
- /*
- * While in hot standby mode, shows that a conflict signal has been sent
- * for the current transaction. Set/cleared while holding ProcArrayLock,
- * though not required. Accessed without lock, if needed.
- *
- * This is a bitmask; each bit corresponds to a RecoveryConflictReason
- * enum value.
- */
- pg_atomic_uint32 pendingRecoveryConflicts;
+ TransactionId xmin; /* minimal running XID as it was when we were
+ * starting our xact, excluding LAZY VACUUM:
+ * vacuum must not remove tuples deleted by
+ * xid >= xmin ! */
+
+ ProcWaitStatus waitStatus;
+ int delayChkptFlags; /* for DELAY_CHKPT_* flags */
+
+ LOCKMODE waitLockMode; /* type of lock we're waiting for */
+ LOCKMASK heldLocks; /* bitmask for lock types already held on this
+ * lock object by this backend */
+
+ uint8 statusFlags; /* this backend's status flags, see PROC_*
+ * above. mirrored in
+ * ProcGlobal->statusFlags[pgxactoff] */
+ XidCacheStatus subxidStatus; /* mirrored with
+ * ProcGlobal->subxidStates[i] */
+
+ bool procArrayGroupMember; /* true, if member of ProcArray group
+ * waiting for XID clear */
+ bool clogGroupMember; /* true, if member of clog group */
+ bool fpVXIDLock; /* are we holding a fast-path VXID lock? */
+
+ LocalTransactionId fpLocalTransactionId; /* lxid for fast-path VXID
+ * lock */
+ PGSemaphore sem; /* ONE semaphore to sleep on */
/*
* Info about LWLock the process is currently waiting for, if any.
@@ -255,6 +262,19 @@ typedef struct PGPROC
*/
uint8 lwWaiting; /* see LWLockWaitState */
uint8 lwWaitMode; /* lwlock mode being waited for */
+
+ Latch procLatch; /* generic latch for process */
+
+ /*
+ * While in hot standby mode, shows that a conflict signal has been sent
+ * for the current transaction. Set/cleared while holding ProcArrayLock,
+ * though not required. Accessed without lock, if needed.
+ *
+ * This is a bitmask; each bit corresponds to a RecoveryConflictReason
+ * enum value.
+ */
+ pg_atomic_uint32 pendingRecoveryConflicts;
+
proclist_node lwWaitLink; /* position in LW lock wait list */
/* Support for condition variables. */
@@ -264,17 +284,6 @@ typedef struct PGPROC
/* waitLock and waitProcLock are NULL if not currently waiting. */
LOCK *waitLock; /* Lock object we're sleeping on ... */
PROCLOCK *waitProcLock; /* Per-holder info for awaited lock */
- LOCKMODE waitLockMode; /* type of lock we're waiting for */
- LOCKMASK heldLocks; /* bitmask for lock types already held on this
- * lock object by this backend */
- pg_atomic_uint64 waitStart; /* time at which wait for lock acquisition
- * started */
-
- int delayChkptFlags; /* for DELAY_CHKPT_* flags */
-
- uint8 statusFlags; /* this backend's status flags, see PROC_*
- * above. mirrored in
- * ProcGlobal->statusFlags[pgxactoff] */
/*
* Info to allow us to wait for synchronous replication, if needed.
@@ -293,15 +302,11 @@ typedef struct PGPROC
*/
dlist_head myProcLocks[NUM_LOCK_PARTITIONS];
- XidCacheStatus subxidStatus; /* mirrored with
- * ProcGlobal->subxidStates[i] */
struct XidCache subxids; /* cache for subtransaction XIDs */
/* Support for group XID clearing. */
- /* true, if member of ProcArray group waiting for XID clear */
- bool procArrayGroupMember;
- /* next ProcArray group member waiting for XID clear */
- pg_atomic_uint32 procArrayGroupNext;
+ pg_atomic_uint32 procArrayGroupNext; /* next ProcArray group member
+ * waiting for XID clear */
/*
* latest transaction id among the transaction's main XID and
@@ -309,10 +314,7 @@ typedef struct PGPROC
*/
TransactionId procArrayGroupMemberXid;
- uint32 wait_event_info; /* proc's wait information */
-
/* Support for group transaction status update. */
- bool clogGroupMember; /* true, if member of clog group */
pg_atomic_uint32 clogGroupNext; /* next clog group member */
TransactionId clogGroupMemberXid; /* transaction id of clog group member */
XidStatus clogGroupMemberXidStatus; /* transaction status of clog
@@ -326,9 +328,6 @@ typedef struct PGPROC
LWLock fpInfoLock; /* protects per-backend fast-path state */
uint64 *fpLockBits; /* lock modes held for each fast-path slot */
Oid *fpRelId; /* slots for rel oids */
- bool fpVXIDLock; /* are we holding a fast-path VXID lock? */
- LocalTransactionId fpLocalTransactionId; /* lxid for fast-path VXID
- * lock */
/*
* Support for lock groups. Use LockHashPartitionLockByProc on the group