X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel.c;h=43c6285773847739afc437de35bbb09cb0f6b0e3;hp=d9e047fc3f5cdcc50a72ea68d0a7f29fa49b159b;hb=335a95b7e3fab0d66908594ac7039651c7aaf6f4;hpb=059e1d3d3268391d73bb0dc733629eb8edfeb1ed

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index d9e047fc3..43c628577 100644
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -638,3 +638,30 @@ error_version:
 error:
 	return ret;
 }
+
+/*
+ * Kernel work-arounds called at the start of sessiond main().
+ */
+int init_kernel_workarounds(void)
+{
+	FILE *fp;
+
+	/*
+	 * boot_id needs to be read once before being used concurrently
+	 * to deal with a Linux kernel race. A fix is proposed for
+	 * upstream, but the work-around is needed for older kernels.
+	 */
+	fp = fopen("/proc/sys/kernel/random/boot_id", "r");
+	if (!fp) {
+		goto end_boot_id;
+	}
+	while (!feof(fp)) {
+		char buf[37] = "";
+
+		(void) fread(buf, 1, sizeof(buf), fp);
+	}
+	fclose(fp);
+end_boot_id:
+
+	return 0;
+}