Hi,
Sometimes I see systems hanging in ddb(4) after panic(9) and the "boot reboot"
command doesn't work anymore, i.e. of filesystem or locking issues.
Bluhm@ suggested to me to use "call cpu_reset" in such situations.
I would like to introduce a command 'boot reset' to do this.
ok?
friehm
Index: share/man/man4//ddb.4
===================================================================
RCS file: /cvs/src/share/man/man4/ddb.4,v
retrieving revision 1.91
diff -u -p -r1.91 ddb.4
--- share/man/man4//ddb.4 29 Sep 2017 09:36:04 -0000 1.91
+++ share/man/man4//ddb.4 26 Oct 2017 08:18:44 -0000
@@ -379,6 +379,10 @@ Just halt.
Just reboot.
.It Ic boot poweroff
Power down the machine whenever possible; if it fails, just halt.
+.It Ic boot reset
+Restart the machine by resetting the CPU. Useful in situations were
+.Ic boot reboot
+does not work anymore.
.El
.\" --------------------
.It Xo
Index: sys/ddb/db_command.c
===================================================================
RCS file: /cvs/src/sys/ddb/db_command.c,v
retrieving revision 1.79
diff -u -p -r1.79 db_command.c
--- sys/ddb/db_command.c 19 Oct 2017 16:58:05 -0000 1.79
+++ sys/ddb/db_command.c 26 Oct 2017 08:18:55 -0000
@@ -105,6 +105,7 @@ void db_boot_dump_cmd(db_expr_t, int, db
void db_boot_halt_cmd(db_expr_t, int, db_expr_t, char *);
void db_boot_reboot_cmd(db_expr_t, int, db_expr_t, char *);
void db_boot_poweroff_cmd(db_expr_t, int, db_expr_t, char *);
+void db_boot_reset_cmd(db_expr_t, int, db_expr_t, char *);
void db_stack_trace_cmd(db_expr_t, int, db_expr_t, char *);
void db_dmesg_cmd(db_expr_t, int, db_expr_t, char *);
void db_show_panic_cmd(db_expr_t, int, db_expr_t, char *);
@@ -606,6 +607,7 @@ struct db_command db_boot_cmds[] = {
{ "halt", db_boot_halt_cmd, 0, 0 },
{ "reboot", db_boot_reboot_cmd, 0, 0 },
{ "poweroff", db_boot_poweroff_cmd, 0, 0 },
+ { "reset", db_boot_reset_cmd, 0, 0 },
{ NULL, }
};
@@ -812,6 +814,12 @@ void
db_boot_poweroff_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif)
{
reboot(RB_NOSYNC | RB_HALT | RB_POWERDOWN | RB_TIMEBAD | RB_USERREQ);
+}
+
+void
+db_boot_reset_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif)
+{
+ cpu_reset();
}
void
