* trigger recursive page faults.
*/
printk_once(KERN_WARNING "LTTng: vmalloc_sync_mappings symbol lookup failed.\n");
- printk_once(KERN_WARNING "Page fault handler and NMI tracing might trigger faults.\n");
+ printk_once(KERN_WARNING "LTTng: Page fault handler and NMI tracing might trigger faults.\n");
#endif
}
}
* trigger recursive page faults.
*/
printk_once(KERN_WARNING "LTTng: vmalloc_sync_all symbol lookup failed.\n");
- printk_once(KERN_WARNING "Page fault handler and NMI tracing might trigger faults.\n");
+ printk_once(KERN_WARNING "LTTng: Page fault handler and NMI tracing might trigger faults.\n");
#endif
}
}
void print_vmalloc_node_range_warning(void)
{
printk_once(KERN_WARNING "LTTng: __vmalloc_node_range symbol lookup failed.\n");
- printk_once(KERN_WARNING "Tracer performance will be degraded on NUMA systems.\n");
- printk_once(KERN_WARNING "Please rebuild your kernel with CONFIG_KALLSYMS enabled.\n");
+ printk_once(KERN_WARNING "LTTng: Tracer performance will be degraded on NUMA systems.\n");
+ printk_once(KERN_WARNING "LTTng: Please rebuild your kernel with CONFIG_KALLSYMS enabled.\n");
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0))
vm_flags, node, caller);
}
-#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) */
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
/*
* kallsyms wrapper of __vmalloc_node with a fallback to kmalloc_node.
node, caller);
}
+#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)) */
+
+/*
+ * kallsyms wrapper of __vmalloc_node with a fallback to kmalloc_node.
+ */
+static inline
+void *__lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ void *caller)
+{
+#ifdef CONFIG_KALLSYMS
+ /*
+ * If we have KALLSYMS, get * __vmalloc_node_range which is not exported.
+ */
+ void *(*lttng__vmalloc_node_range)(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, void *caller);
+
+ lttng__vmalloc_node_range = (void *) kallsyms_lookup_funcptr("__vmalloc_node_range");
+ if (lttng__vmalloc_node_range)
+ return lttng__vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+#endif
+ if (node != NUMA_NO_NODE)
+ print_vmalloc_node_range_warning();
+ return __vmalloc(size, gfp_mask, prot);
+}
+
+/*
+ * Canary function to check for '__vmalloc_node_range()' at compile time.
+ *
+ * From 'include/linux/vmalloc.h':
+ *
+ * extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ * unsigned long start, unsigned long end, gfp_t gfp_mask,
+ * pgprot_t prot, unsigned long vm_flags, int node,
+ * void *caller);
+ */
+static inline
+void *__canary____lttng_vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, int node, void *caller)
+{
+ return __vmalloc_node_range(size, align, start, end, gfp_mask, prot,
+ node, caller);
+}
+
#endif
/**