diff options
Diffstat (limited to 'main/db/patch.4.7.25.3')
| -rw-r--r-- | main/db/patch.4.7.25.3 | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/main/db/patch.4.7.25.3 b/main/db/patch.4.7.25.3 new file mode 100644 index 000000000..b58a43074 --- /dev/null +++ b/main/db/patch.4.7.25.3 @@ -0,0 +1,314 @@ +*** lock/lock_deadlock.c 2008-03-11 00:31:33.000000000 +1100
+--- lock/lock_deadlock.c 2008-12-16 21:54:18.000000000 +1100
+***************
+*** 121,127 ****
+ DB_LOCKTAB *lt;
+ db_timespec now;
+ locker_info *idmap;
+! u_int32_t *bitmap, *copymap, **deadp, **free_me, *tmpmap;
+ u_int32_t i, cid, keeper, killid, limit, nalloc, nlockers;
+ u_int32_t lock_max, txn_max;
+ int ret, status;
+--- 121,127 ----
+ DB_LOCKTAB *lt;
+ db_timespec now;
+ locker_info *idmap;
+! u_int32_t *bitmap, *copymap, **deadp, **deadlist, *tmpmap;
+ u_int32_t i, cid, keeper, killid, limit, nalloc, nlockers;
+ u_int32_t lock_max, txn_max;
+ int ret, status;
+***************
+*** 133,139 ****
+ if (IS_REP_CLIENT(env))
+ atype = DB_LOCK_MINWRITE;
+
+! free_me = NULL;
+
+ lt = env->lk_handle;
+ if (rejectp != NULL)
+--- 133,140 ----
+ if (IS_REP_CLIENT(env))
+ atype = DB_LOCK_MINWRITE;
+
+! copymap = tmpmap = NULL;
+! deadlist = NULL;
+
+ lt = env->lk_handle;
+ if (rejectp != NULL)
+***************
+*** 179,189 ****
+ memcpy(copymap, bitmap, nlockers * sizeof(u_int32_t) * nalloc);
+
+ if ((ret = __os_calloc(env, sizeof(u_int32_t), nalloc, &tmpmap)) != 0)
+! goto err1;
+
+ /* Find a deadlock. */
+ if ((ret =
+! __dd_find(env, bitmap, idmap, nlockers, nalloc, &deadp)) != 0)
+ return (ret);
+
+ /*
+--- 180,190 ----
+ memcpy(copymap, bitmap, nlockers * sizeof(u_int32_t) * nalloc);
+
+ if ((ret = __os_calloc(env, sizeof(u_int32_t), nalloc, &tmpmap)) != 0)
+! goto err;
+
+ /* Find a deadlock. */
+ if ((ret =
+! __dd_find(env, bitmap, idmap, nlockers, nalloc, &deadlist)) != 0)
+ return (ret);
+
+ /*
+***************
+*** 204,211 ****
+ txn_max = TXN_MAXIMUM;
+
+ killid = BAD_KILLID;
+! free_me = deadp;
+! for (; *deadp != NULL; deadp++) {
+ if (rejectp != NULL)
+ ++*rejectp;
+ killid = (u_int32_t)(*deadp - bitmap) / nalloc;
+--- 205,211 ----
+ txn_max = TXN_MAXIMUM;
+
+ killid = BAD_KILLID;
+! for (deadp = deadlist; *deadp != NULL; deadp++) {
+ if (rejectp != NULL)
+ ++*rejectp;
+ killid = (u_int32_t)(*deadp - bitmap) / nalloc;
+***************
+*** 342,352 ****
+ __db_msg(env,
+ "Aborting locker %lx", (u_long)idmap[killid].id);
+ }
+! __os_free(env, tmpmap);
+! err1: __os_free(env, copymap);
+!
+! err: if (free_me != NULL)
+! __os_free(env, free_me);
+ __os_free(env, bitmap);
+ __os_free(env, idmap);
+
+--- 342,353 ----
+ __db_msg(env,
+ "Aborting locker %lx", (u_long)idmap[killid].id);
+ }
+! err: if(copymap != NULL)
+! __os_free(env, copymap);
+! if (deadlist != NULL)
+! __os_free(env, deadlist);
+! if(tmpmap != NULL)
+! __os_free(env, tmpmap);
+ __os_free(env, bitmap);
+ __os_free(env, idmap);
+
+***************
+*** 360,365 ****
+--- 361,377 ----
+
+ #define DD_INVALID_ID ((u_int32_t) -1)
+
++ /*
++ * __dd_build --
++ * Build the lock dependency bit maps.
++ * Notes on syncronization:
++ * LOCK_SYSTEM_LOCK is used to hold objects locked when we have
++ * a single partition.
++ * LOCK_LOCKERS is held while we are walking the lockers list and
++ * to single thread the use of lockerp->dd_id.
++ * LOCK_DD protects the DD list of objects.
++ */
++
+ static int
+ __dd_build(env, atype, bmp, nlockers, allocp, idmap, rejectp)
+ ENV *env;
+***************
+*** 393,398 ****
+--- 405,411 ----
+ * In particular we do not build the conflict array and our caller
+ * needs to expect this.
+ */
++ LOCK_SYSTEM_LOCK(lt, region);
+ if (atype == DB_LOCK_EXPIRE) {
+ skip: LOCK_DD(env, region);
+ op = SH_TAILQ_FIRST(®ion->dd_objs, __db_lockobj);
+***************
+*** 430,446 ****
+ OBJECT_UNLOCK(lt, region, indx);
+ }
+ UNLOCK_DD(env, region);
+ goto done;
+ }
+
+ /*
+! * We'll check how many lockers there are, add a few more in for
+! * good measure and then allocate all the structures. Then we'll
+! * verify that we have enough room when we go back in and get the
+! * mutex the second time.
+ */
+! retry: count = region->stat.st_nlockers;
+ if (count == 0) {
+ *nlockers = 0;
+ return (0);
+ }
+--- 443,460 ----
+ OBJECT_UNLOCK(lt, region, indx);
+ }
+ UNLOCK_DD(env, region);
++ LOCK_SYSTEM_UNLOCK(lt, region);
+ goto done;
+ }
+
+ /*
+! * Allocate after locking the region
+! * to make sure the structures are large enough.
+ */
+! LOCK_LOCKERS(env, region);
+! count = region->stat.st_nlockers;
+ if (count == 0) {
++ UNLOCK_LOCKERS(env, region);
+ *nlockers = 0;
+ return (0);
+ }
+***************
+*** 448,497 ****
+ if (FLD_ISSET(env->dbenv->verbose, DB_VERB_DEADLOCK))
+ __db_msg(env, "%lu lockers", (u_long)count);
+
+- count += 20;
+ nentries = (u_int32_t)DB_ALIGN(count, 32) / 32;
+
+! /*
+! * Allocate enough space for a count by count bitmap matrix.
+! *
+! * XXX
+! * We can probably save the malloc's between iterations just
+! * reallocing if necessary because count grew by too much.
+! */
+ if ((ret = __os_calloc(env, (size_t)count,
+! sizeof(u_int32_t) * nentries, &bitmap)) != 0)
+ return (ret);
+
+ if ((ret = __os_calloc(env,
+ sizeof(u_int32_t), nentries, &tmpmap)) != 0) {
+ __os_free(env, bitmap);
+ return (ret);
+ }
+
+ if ((ret = __os_calloc(env,
+ (size_t)count, sizeof(locker_info), &id_array)) != 0) {
+ __os_free(env, bitmap);
+ __os_free(env, tmpmap);
+ return (ret);
+ }
+
+ /*
+- * Now go back in and actually fill in the matrix.
+- */
+- if (region->stat.st_nlockers > count) {
+- __os_free(env, bitmap);
+- __os_free(env, tmpmap);
+- __os_free(env, id_array);
+- goto retry;
+- }
+-
+- /*
+ * First we go through and assign each locker a deadlock detector id.
+ */
+ id = 0;
+- LOCK_LOCKERS(env, region);
+ SH_TAILQ_FOREACH(lip, ®ion->lockers, ulinks, __db_locker) {
+ if (lip->master_locker == INVALID_ROFF) {
+ lip->dd_id = id++;
+ id_array[lip->dd_id].id = lip->id;
+ switch (atype) {
+--- 462,498 ----
+ if (FLD_ISSET(env->dbenv->verbose, DB_VERB_DEADLOCK))
+ __db_msg(env, "%lu lockers", (u_long)count);
+
+ nentries = (u_int32_t)DB_ALIGN(count, 32) / 32;
+
+! /* Allocate enough space for a count by count bitmap matrix. */
+ if ((ret = __os_calloc(env, (size_t)count,
+! sizeof(u_int32_t) * nentries, &bitmap)) != 0) {
+! UNLOCK_LOCKERS(env, region);
+ return (ret);
++ }
+
+ if ((ret = __os_calloc(env,
+ sizeof(u_int32_t), nentries, &tmpmap)) != 0) {
++ UNLOCK_LOCKERS(env, region);
+ __os_free(env, bitmap);
+ return (ret);
+ }
+
+ if ((ret = __os_calloc(env,
+ (size_t)count, sizeof(locker_info), &id_array)) != 0) {
++ UNLOCK_LOCKERS(env, region);
+ __os_free(env, bitmap);
+ __os_free(env, tmpmap);
+ return (ret);
+ }
+
+ /*
+ * First we go through and assign each locker a deadlock detector id.
+ */
+ id = 0;
+ SH_TAILQ_FOREACH(lip, ®ion->lockers, ulinks, __db_locker) {
+ if (lip->master_locker == INVALID_ROFF) {
++ DB_ASSERT(env, id < count);
+ lip->dd_id = id++;
+ id_array[lip->dd_id].id = lip->id;
+ switch (atype) {
+***************
+*** 510,516 ****
+ lip->dd_id = DD_INVALID_ID;
+
+ }
+- UNLOCK_LOCKERS(env, region);
+
+ /*
+ * We only need consider objects that have waiters, so we use
+--- 511,516 ----
+***************
+*** 669,675 ****
+ * status after building the bit maps so that we will not detect
+ * a blocked transaction without noting that it is already aborting.
+ */
+- LOCK_LOCKERS(env, region);
+ for (id = 0; id < count; id++) {
+ if (!id_array[id].valid)
+ continue;
+--- 669,674 ----
+***************
+*** 738,743 ****
+--- 737,743 ----
+ id_array[id].in_abort = 1;
+ }
+ UNLOCK_LOCKERS(env, region);
++ LOCK_SYSTEM_UNLOCK(lt, region);
+
+ /*
+ * Now we can release everything except the bitmap matrix that we
+***************
+*** 839,844 ****
+--- 839,845 ----
+ ret = 0;
+
+ /* We must lock so this locker cannot go away while we abort it. */
++ LOCK_SYSTEM_LOCK(lt, region);
+ LOCK_LOCKERS(env, region);
+
+ /*
+***************
+*** 895,900 ****
+--- 896,902 ----
+ done: OBJECT_UNLOCK(lt, region, info->last_ndx);
+ err:
+ out: UNLOCK_LOCKERS(env, region);
++ LOCK_SYSTEM_UNLOCK(lt, region);
+ return (ret);
+ }
+
|