Merge "logd: fix persistent blocking reader performance"

    uid_t uid = reader->getUid();

    pthread_mutex_lock(&mLogElementsLock);

    for (it = mLogElements.begin(); it != mLogElements.end(); ++it) {

    if (start == LogTimeEntry::EPOCH) {

        // client wants to start from the beginning

        it = mLogElements.begin();

    } else {

        // Client wants to start from some specified time. Chances are

        // we are better off starting from the end of the time sorted list.

        for (it = mLogElements.end(); it != mLogElements.begin(); /* do nothing */) {

            --it;

            LogBufferElement *element = *it;

            if (element->getMonotonicTime() <= start) {

                it++;

                break;

            }

        }

    }

    for (; it != mLogElements.end(); ++it) {

        LogBufferElement *element = *it;

        if (!privileged && (element->getUid() != uid)) {