Version 2.6.6

[lttng-modules.git] / lttng-events.c

diff --git a/lttng-events.c b/lttng-events.c
index d8cf337de93bf75d92b81754a7325fc0e2d0d1ee..8befa34f7ad6f4d5dc7d676adf4b40709d5ef814 100644 (file)
--- a/lttng-events.c
+++ b/lttng-events.c
@@ -44,6 +44,9 @@
 #include "lttng-events.h"
 #include "lttng-tracer.h"
 #include "lttng-abi-old.h"
+#include "wrapper/vzalloc.h"
+#include "wrapper/ringbuffer/backend.h"
+#include "wrapper/ringbuffer/frontend.h"
 
 #define METADATA_CACHE_DEFAULT_SIZE 4096
 
@@ -98,7 +101,7 @@ struct lttng_session *lttng_session_create(void)
                        GFP_KERNEL);
        if (!metadata_cache)
                goto err_free_session;
-       metadata_cache->data = vzalloc(METADATA_CACHE_DEFAULT_SIZE);
+       metadata_cache->data = lttng_vzalloc(METADATA_CACHE_DEFAULT_SIZE);
        if (!metadata_cache->data)
                goto err_free_cache;
        metadata_cache->cache_alloc = METADATA_CACHE_DEFAULT_SIZE;
@@ -185,6 +188,12 @@ int lttng_session_enable(struct lttng_session *session)
                        chan->header_type = 2;  /* large */
        }
 
+       /* Clear each stream's quiescent state. */
+       list_for_each_entry(chan, &session->chan, list) {
+               if (chan->channel_type != METADATA_CHANNEL)
+                       lib_ring_buffer_clear_quiescent_channel(chan->chan);
+       }
+
        ACCESS_ONCE(session->active) = 1;
        ACCESS_ONCE(session->been_active) = 1;
        ret = _lttng_session_metadata_statedump(session);
@@ -203,6 +212,7 @@ end:
 int lttng_session_disable(struct lttng_session *session)
 {
        int ret = 0;
+       struct lttng_channel *chan;
 
        mutex_lock(&sessions_mutex);
        if (!session->active) {
@@ -210,6 +220,13 @@ int lttng_session_disable(struct lttng_session *session)
                goto end;
        }
        ACCESS_ONCE(session->active) = 0;
+
+       /* Set each stream's quiescent state. */
+       list_for_each_entry(chan, &session->chan, list) {
+               if (chan->channel_type != METADATA_CHANNEL)
+                       lib_ring_buffer_set_quiescent_channel(chan->chan);
+       }
+
 end:
        mutex_unlock(&sessions_mutex);
        return ret;
@@ -688,7 +705,7 @@ int lttng_metadata_printf(struct lttng_session *session,
                tmp_cache_alloc_size = max_t(unsigned int,
                                session->metadata_cache->cache_alloc + len,
                                session->metadata_cache->cache_alloc << 1);
-               tmp_cache_realloc = vzalloc(tmp_cache_alloc_size);
+               tmp_cache_realloc = lttng_vzalloc(tmp_cache_alloc_size);
                if (!tmp_cache_realloc)
                        goto err;
                if (session->metadata_cache->data) {