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diskstore race condition fixed

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antirez 2011-01-02 17:42:04 +01:00
parent 133cf28ee8
commit e37efb0d8b
1 changed files with 24 additions and 0 deletions
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24
src/dscache.c
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@ -596,6 +596,11 @@ void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag) {
return;
} else {
long flags = (long) dictGetEntryVal(de);
if (flags & flag) {
redisLog(REDIS_WARNING,"Adding the same flag again: was: %ld, addede: %ld",flags,flag);
redisAssert(!(flags & flag));
}
flags |= flag;
dictGetEntryVal(de) = (void*) flags;
}
@ -662,6 +667,8 @@ void cacheCron(void) {
topush = 100-jobs;
if (topush < 0) topush = 0;
if (topush > (signed)listLength(server.cache_io_queue))
topush = listLength(server.cache_io_queue);
while((ln = listFirst(server.cache_io_queue)) != NULL) {
ioop *op = ln->value;
@ -675,6 +682,23 @@ void cacheCron(void) {
struct dictEntry *de;
robj *val;
/* Don't add a SAVE job in queue if there is already
* a save in progress for the same key. */
if (op->type == REDIS_IO_SAVE &&
cacheScheduleIOGetFlags(op->db,op->key) & REDIS_IO_SAVEINPROG)
{
/* Move the operation at the end of the list of there
* are other operations. Otherwise break, nothing to do
* here. */
if (listLength(server.cache_io_queue) > 1) {
listDelNode(server.cache_io_queue,ln);
listAddNodeTail(server.cache_io_queue,op);
continue;
} else {
break;
}
}
redisLog(REDIS_DEBUG,"Creating IO %s Job for key %s",
op->type == REDIS_IO_LOAD ? "load" : "save", op->key->ptr);