PROBE-FILE on symlinks to pipes inside /proc on Linux.

[sbcl.git] / src / runtime / linux-os.h

diff --git a/src/runtime/linux-os.h b/src/runtime/linux-os.h
index f0387e9..6f1003c 100644 (file)
--- a/src/runtime/linux-os.h
+++ b/src/runtime/linux-os.h
@@ -39,4 +39,8 @@ typedef int os_vm_prot_t;
 
 #define SIG_MEMORY_FAULT SIGSEGV
 
-#define SIG_STOP_FOR_GC (SIGUSR1)
+/* Note that this must be higher than the highest numbered
+ * synchronously generated signal that we handle (that is SIGSEGV),
+ * due to Linux signal handling pecularities. See thread "Signal
+ * delivery order" from 2009-03-14 on kernel-devel@vger.kernel.org. */
+#define SIG_STOP_FOR_GC (SIGUSR2)