From: Thomas Veerman <thomas@minix3.org>
Date: Wed, 2 Jan 2013 13:41:36 +0000 (+0000)
Subject: Add stack trace dumps for VFS over serial
X-Git-Tag: v3.2.1~123
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=ea8ff9284a77ff625d81d16f4a66212730071aee;p=minix.git

Add stack trace dumps for VFS over serial
---

diff --git a/kernel/arch/i386/arch_system.c b/kernel/arch/i386/arch_system.c
index 14ce73e06..2c5e0931e 100644
--- a/kernel/arch/i386/arch_system.c
+++ b/kernel/arch/i386/arch_system.c
@@ -45,6 +45,8 @@ static int osfxsr_feature; /* FXSAVE/FXRSTOR instructions support (SSEx) */
 void * k_stacks;
 
 static void ser_debug(int c);
+static void ser_dump_vfs(void);
+
 #ifdef CONFIG_SMP
 static void ser_dump_proc_cpu(void);
 #endif
@@ -391,6 +393,9 @@ static void ser_debug(const int c)
 		ser_dump_proc_cpu();
 		break;
 #endif
+	case '5':
+		ser_dump_vfs();
+		break;
 #if DEBUG_TRACE
 #define TOGGLECASE(ch, flag)				\
 	case ch: {					\
@@ -428,6 +433,14 @@ void ser_dump_proc()
 	}
 }
 
+static void ser_dump_vfs()
+{
+	/* Notify VFS it has to generate stack traces. Kernel can't do that as
+	 * it's not aware of user space threads.
+	 */
+	mini_notify(proc_addr(KERNEL), VFS_PROC_NR);
+}
+
 #ifdef CONFIG_SMP
 static void ser_dump_proc_cpu(void)
 {
diff --git a/servers/vfs/main.c b/servers/vfs/main.c
index 249fb5259..1ba96cfba 100644
--- a/servers/vfs/main.c
+++ b/servers/vfs/main.c
@@ -112,6 +112,8 @@ int main(void)
 		/* A task notify()ed us */
 		if (who_e == DS_PROC_NR)
 			handle_work(ds_event);
+		else if (who_e == KERNEL)
+			mthread_stacktraces();
 		else if (fp != NULL && (fp->fp_flags & FP_SRV_PROC))
 			handle_work(do_dev_event);
 		else