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Merge branch 'smallkeys' of github.com:antirez/redis into smallkeys

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antirez 2010-06-01 14:18:38 +02:00
commit 4e538759c4
1 changed files with 20 additions and 10 deletions
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28
redis.c
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@ -90,7 +90,7 @@
#define REDIS_STATIC_ARGS 8
#define REDIS_DEFAULT_DBNUM 16
#define REDIS_CONFIGLINE_MAX 1024
#define REDIS_OBJFREELIST_MAX 1000000 /* Max number of objects to cache */
#define REDIS_OBJFREELIST_MAX 0 /* Max number of objects to cache */
#define REDIS_MAX_SYNC_TIME 60 /* Slave can't take more to sync */
#define REDIS_EXPIRELOOKUPS_PER_CRON 10 /* lookup 10 expires per loop */
#define REDIS_MAX_WRITE_PER_EVENT (1024*64)
@ -3099,10 +3099,18 @@ static void decrRefCount(void *obj) {
}
if (o->refcount <= 0) redisPanic("decrRefCount against refcount <= 0");
/* Object is in memory, or in the process of being swapped out. */
if (--(o->refcount) == 0) {
/* Object is in memory, or in the process of being swapped out.
*
* If the object is being swapped out, abort the operation on
* decrRefCount even if the refcount does not drop to 0: the object
* is referenced at least two times, as value of the key AND as
* job->val in the iojob. So if we don't invalidate the iojob, when it is
* done but the relevant key was removed in the meantime, the
* complete jobs handler will not find the key about the job and the
* assert will fail. */
if (server.vm_enabled && o->storage == REDIS_VM_SWAPPING)
vmCancelThreadedIOJob(obj);
vmCancelThreadedIOJob(o);
if (--(o->refcount) == 0) {
switch(o->type) {
case REDIS_STRING: freeStringObject(o); break;
case REDIS_LIST: freeListObject(o); break;
@ -9411,11 +9419,9 @@ static void freeIOJob(iojob *j) {
j->type == REDIS_IOJOB_DO_SWAP ||
j->type == REDIS_IOJOB_LOAD) && j->val != NULL)
{
/* Our value object was successfully swapped if
* refcount == 1 and storage == REDIS_VM_SWAPPING,
* we fix the storage type, otherwise decrRefCount() will try to
/* we fix the storage type, otherwise decrRefCount() will try to
* kill the I/O thread Job (that does no longer exists). */
if (j->val->refcount == 1 && j->val->storage == REDIS_VM_SWAPPING)
if (j->val->storage == REDIS_VM_SWAPPING)
j->val->storage = REDIS_VM_MEMORY;
decrRefCount(j->val);
}
@ -9464,7 +9470,7 @@ static void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata,
* can do just here to avoid race conditions and/or invasive locks */
redisLog(REDIS_DEBUG,"COMPLETED Job type: %d, ID %p, key: %s", j->type, (void*)j->id, (unsigned char*)j->key->ptr);
de = dictFind(j->db->dict,j->key);
assert(de != NULL);
redisAssert(de != NULL);
if (j->type == REDIS_IOJOB_LOAD) {
redisDb *db;
vmpointer *vp = dictGetEntryVal(de);
@ -9520,6 +9526,9 @@ static void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata,
vp->page = j->page;
vp->usedpages = j->pages;
dictGetEntryVal(de) = vp;
/* Fix the storage otherwise decrRefCount will attempt to
* remove the associated I/O job */
j->val->storage = REDIS_VM_MEMORY;
decrRefCount(j->val);
redisLog(REDIS_DEBUG,
"VM: object %s swapped out at %lld (%lld pages) (threaded)",
@ -9638,6 +9647,7 @@ again:
else if (o->storage == REDIS_VM_SWAPPING)
o->storage = REDIS_VM_MEMORY;
unlockThreadedIO();
redisLog(REDIS_DEBUG,"*** DONE");
return;
}
}