2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
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11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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19 * may be used to endorse or promote products derived from this software
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30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94
35 * $FreeBSD: src/sys/kern/kern_shutdown.c,v 1.72.2.12 2002/02/21 19:15:10 dillon Exp $
39 #include "opt_ddb_trace.h"
40 #include "opt_panic.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/eventhandler.h>
48 #include <sys/diskslice.h>
49 #include <sys/reboot.h>
52 #include <sys/fcntl.h> /* FREAD */
53 #include <sys/stat.h> /* S_IFCHR */
54 #include <sys/vnode.h>
55 #include <sys/kernel.h>
56 #include <sys/kerneldump.h>
57 #include <sys/kthread.h>
58 #include <sys/malloc.h>
59 #include <sys/mount.h>
60 #include <sys/queue.h>
61 #include <sys/sysctl.h>
62 #include <sys/vkernel.h>
64 #include <sys/sysmsg.h>
65 #include <sys/device.h>
69 #include <sys/kern_syscall.h>
70 #include <vm/vm_map.h>
73 #include <sys/thread2.h>
75 #include <sys/mplock2.h>
77 #include <machine/cpu.h>
78 #include <machine/clock.h>
79 #include <machine/md_var.h>
80 #include <machine/smp.h> /* smp_active_mask, cpuid */
81 #include <machine/vmparam.h>
82 #include <machine/thread.h>
84 #include <sys/signalvar.h>
86 #if defined(WDOG_DISABLE_ON_PANIC)
89 #include <dev/acpica/acpi_pvpanic/panic_notifier.h>
90 #if (NGPIO > 0) && defined(ERROR_LED_ON_PANIC)
91 #include <dev/misc/gpio/gpio.h>
94 #ifndef PANIC_REBOOT_WAIT_TIME
95 #define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */
99 * Note that stdarg.h and the ANSI style va_start macro is used for both
100 * ANSI and traditional C compilers. We use the machine version to stay
101 * within the confines of the kernel header files.
103 #include <machine/stdarg.h>
107 #ifdef DDB_UNATTENDED
108 int debugger_on_panic
= 0;
110 int debugger_on_panic
= 1;
112 SYSCTL_INT(_debug
, OID_AUTO
, debugger_on_panic
, CTLFLAG_RW
,
113 &debugger_on_panic
, 0, "Run debugger on kernel panic");
116 int trace_on_panic
= 1;
118 int trace_on_panic
= 0;
120 SYSCTL_INT(_debug
, OID_AUTO
, trace_on_panic
, CTLFLAG_RW
,
121 &trace_on_panic
, 0, "Print stack trace on kernel panic");
124 static int sync_on_panic
= 0;
125 SYSCTL_INT(_kern
, OID_AUTO
, sync_on_panic
, CTLFLAG_RW
,
126 &sync_on_panic
, 0, "Do a sync before rebooting from a panic");
128 SYSCTL_NODE(_kern
, OID_AUTO
, shutdown
, CTLFLAG_RW
, 0, "Shutdown environment");
131 * Variable panicstr contains argument to first call to panic; used as flag
132 * to indicate that the kernel has already called panic.
134 const char *panicstr
;
136 __read_mostly
int dumping
; /* system is dumping */
137 static struct dumperinfo dumper
; /* selected dumper */
139 __read_frequently globaldata_t panic_cpu_gd
; /* used in lock assertion */
140 struct lwkt_tokref panic_tokens
[LWKT_MAXTOKENS
];
141 int panic_tokens_count
;
143 __read_mostly
int bootverbose
= 0; /* note: assignment to force non-bss */
144 SYSCTL_INT(_debug
, OID_AUTO
, bootverbose
, CTLFLAG_RW
,
145 &bootverbose
, 0, "Verbose kernel messages");
147 int cold
= 1; /* note: assignment to force non-bss */
148 int dumplo
; /* OBSOLETE - savecore compat */
151 static void boot (int) __dead2
;
152 static int setdumpdev (cdev_t dev
);
153 static void poweroff_wait (void *, int);
154 static void print_uptime (void);
155 static void shutdown_halt (void *junk
, int howto
);
156 static void shutdown_panic (void *junk
, int howto
);
157 static void shutdown_reset (void *junk
, int howto
);
158 static int shutdown_busycount1(struct buf
*bp
, void *info
);
159 static int shutdown_busycount2(struct buf
*bp
, void *info
);
160 static void shutdown_cleanup_proc(struct proc
*p
);
162 /* register various local shutdown events */
164 shutdown_conf(void *unused
)
166 EVENTHANDLER_REGISTER(shutdown_final
, poweroff_wait
, NULL
, SHUTDOWN_PRI_FIRST
);
167 EVENTHANDLER_REGISTER(shutdown_final
, shutdown_halt
, NULL
, SHUTDOWN_PRI_LAST
+ 100);
168 EVENTHANDLER_REGISTER(shutdown_final
, shutdown_panic
, NULL
, SHUTDOWN_PRI_LAST
+ 100);
169 EVENTHANDLER_REGISTER(shutdown_final
, shutdown_reset
, NULL
, SHUTDOWN_PRI_LAST
+ 200);
172 SYSINIT(shutdown_conf
, SI_BOOT2_MACHDEP
, SI_ORDER_ANY
, shutdown_conf
, NULL
);
177 * The system call that results in a reboot
182 sys_reboot(struct sysmsg
*sysmsg
, const struct reboot_args
*uap
)
186 if ((error
= caps_priv_check_self(SYSCAP_NOREBOOT
)))
196 * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC
198 static int shutdown_howto
= 0;
201 shutdown_nice(int howto
)
203 shutdown_howto
= howto
;
205 /* Send a signal to init(8) and have it shutdown the world */
206 if (initproc
!= NULL
) {
207 ksignal(initproc
, SIGINT
);
209 /* No init(8) running, so simply reboot */
214 static int waittime
= -1;
216 struct thread
*dumpthread
;
227 if (ts
.tv_sec
>= 86400) {
228 kprintf("%ldd", ts
.tv_sec
/ 86400);
232 if (f
|| ts
.tv_sec
>= 3600) {
233 kprintf("%ldh", ts
.tv_sec
/ 3600);
237 if (f
|| ts
.tv_sec
>= 60) {
238 kprintf("%ldm", ts
.tv_sec
/ 60);
242 kprintf("%lds\n", ts
.tv_sec
);
246 * Go through the rigmarole of shutting down..
247 * this used to be in machdep.c but I'll be dammned if I could see
248 * anything machine dependant in it.
254 * Get rid of any user scheduler baggage and then give
255 * us a high priority.
257 if (curthread
->td_release
)
258 curthread
->td_release(curthread
);
259 lwkt_setpri_self(TDPRI_MAX
);
261 /* collect extra flags that shutdown_nice might have set */
262 howto
|= shutdown_howto
;
265 * We really want to shutdown on the BSP. Subsystems such as ACPI
266 * can't power-down the box otherwise.
268 if (!CPUMASK_ISUP(smp_active_mask
)) {
269 kprintf("boot() called on cpu#%d\n", mycpu
->gd_cpuid
);
271 if (panicstr
== NULL
&& mycpu
->gd_cpuid
!= 0) {
272 kprintf("Switching to cpu #0 for shutdown\n");
273 lwkt_setcpu_self(globaldata_find(0));
276 * Do any callouts that should be done BEFORE syncing the filesystems.
278 EVENTHANDLER_INVOKE(shutdown_pre_sync
, howto
);
281 * Try to get rid of any remaining FS references. The calling
282 * process, proc0, and init may still hold references. The
283 * VFS cache subsystem may still hold a root reference to root.
285 * XXX this needs work. We really need to SIGSTOP all remaining
286 * processes in order to avoid blowups due to proc0's filesystem
287 * references going away. For now just make sure that the init
288 * process is stopped.
290 if (panicstr
== NULL
) {
291 shutdown_cleanup_proc(curproc
);
292 shutdown_cleanup_proc(&proc0
);
294 if (initproc
!= curproc
) {
295 ksignal(initproc
, SIGSTOP
);
296 tsleep(boot
, 0, "shutdn", hz
/ 20);
298 shutdown_cleanup_proc(initproc
);
300 vfs_cache_setroot(NULL
, NULL
);
304 * Now sync filesystems
306 if (!cold
&& (howto
& RB_NOSYNC
) == 0 && waittime
< 0) {
307 int iter
, nbusy
, pbusy
;
312 kprintf("\nsyncing disks... ");
314 sys_sync(NULL
, NULL
);
317 * With soft updates, some buffers that are written will be
318 * remarked as dirty until other buffers are written.
320 * sys_sync() usually runs asynchronously, to give us a
321 * better chance of syncing the rest of the filesystems when
322 * one or more of them are stuck.
324 for (iter
= pbusy
= 0; iter
< 20 + zcount
; iter
++) {
326 nbusy
= scan_all_buffers(shutdown_busycount1
,
329 nbusy
= scan_all_buffers(shutdown_busycount2
,
331 kprintf("%d ", nbusy
);
340 * There could be a lot to sync, only allow iter to
341 * proceed while there is progress.
353 * Process soft update work queue if buffers don't sync
354 * after 6 iterations by permitting the syncer to run.
359 sys_sync(NULL
, NULL
);
360 tsleep(boot
, 0, "shutdn", hz
* iter
/ 20 + 1);
366 * Failed to sync all blocks. Indicate this and don't
367 * unmount filesystems (thus forcing an fsck on reboot).
369 kprintf("giving up on %d buffers\n", nbusy
);
371 if (debugger_on_panic
)
372 Debugger("busy buffer problem");
374 tsleep(boot
, 0, "shutdn", hz
* 5 + 1);
379 * Unmount filesystems
381 if (panicstr
== NULL
)
384 tsleep(boot
, 0, "shutdn", hz
/ 10 + 1);
390 * Dump before doing post_sync shutdown ops
393 if ((howto
& (RB_HALT
|RB_DUMP
)) == RB_DUMP
&& !cold
) {
398 * Ok, now do things that assume all filesystem activity has
399 * been completed. This will also call the device shutdown
402 EVENTHANDLER_INVOKE(shutdown_post_sync
, howto
);
404 /* Now that we're going to really halt the system... */
405 EVENTHANDLER_INVOKE(shutdown_final
, howto
);
407 for(;;) ; /* safety against shutdown_reset not working */
412 * Pass 1 - Figure out if there are any busy or dirty buffers still present.
414 * We ignore TMPFS mounts in this pass.
417 shutdown_busycount1(struct buf
*bp
, void *info __unused
)
421 if ((vp
= bp
->b_vp
) != NULL
&& vp
->v_tag
== VT_TMPFS
)
423 if ((bp
->b_flags
& B_INVAL
) == 0 && BUF_LOCKINUSE(bp
))
425 if ((bp
->b_flags
& (B_DELWRI
| B_INVAL
)) == B_DELWRI
)
431 * Pass 2 - only run after pass 1 has completed or has given up
433 * We ignore TMPFS, NFS, MFS, and SMBFS mounts in this pass.
436 shutdown_busycount2(struct buf
*bp
, void *info
)
443 * Ignore tmpfs and nfs mounts
445 if ((vp
= bp
->b_vp
) != NULL
) {
446 if (vp
->v_tag
== VT_TMPFS
)
448 if (vp
->v_tag
== VT_NFS
)
450 if (vp
->v_tag
== VT_MFS
)
452 if (vp
->v_tag
== VT_SMBFS
)
457 * Only count buffers stuck on I/O, ignore everything else
459 if (((bp
->b_flags
& B_INVAL
) == 0 && BUF_LOCKINUSE(bp
)) ||
460 ((bp
->b_flags
& (B_DELWRI
|B_INVAL
)) == B_DELWRI
)) {
462 * Only count buffers undergoing write I/O
463 * on the related vnode.
465 if (bp
->b_vp
== NULL
||
466 bio_track_active(&bp
->b_vp
->v_track_write
) == 0) {
471 if (bp
->b_vp
->v_mount
)
472 mpath
= bp
->b_vp
->v_mount
->mnt_stat
.f_mntonname
;
474 kprintf("%p on %s, flags:%08x, loffset:%jd, "
479 (intmax_t)bp
->b_loffset
,
480 (intmax_t)bp
->b_bio2
.bio_offset
);
488 * If the shutdown was a clean halt, behave accordingly.
491 shutdown_halt(void *junk
, int howto
)
493 if (howto
& RB_HALT
) {
495 kprintf("The operating system has halted.\n");
496 #ifdef _KERNEL_VIRTUAL
499 kprintf("Please press any key to reboot.\n\n");
502 case -1: /* No console, just die */
514 * Check to see if the system paniced, pause and then reboot
515 * according to the specified delay.
518 shutdown_panic(void *junk
, int howto
)
523 if (howto
& RB_DUMP
) {
524 if (PANIC_REBOOT_WAIT_TIME
!= 0) {
525 if (PANIC_REBOOT_WAIT_TIME
!= -1) {
526 kprintf("Automatic reboot in %d seconds - "
527 "press a key on the console to abort\n",
528 PANIC_REBOOT_WAIT_TIME
);
529 for (loop
= PANIC_REBOOT_WAIT_TIME
* 10;
531 DELAY(1000 * 100); /* 1/10th second */
532 /* Did user type a key? */
534 if (c
!= -1 && c
!= NOKEY
)
540 } else { /* zero time specified - reboot NOW */
543 kprintf("--> Press a key on the console to reboot,\n");
544 kprintf("--> or switch off the system now.\n");
550 * Everything done, now reset
553 shutdown_reset(void *junk
, int howto
)
555 kprintf("Rebooting...\n");
556 DELAY(1000000); /* wait 1 sec for kprintf's to complete and be read */
557 /* cpu_boot(howto); */ /* doesn't do anything at the moment */
559 /* NOTREACHED */ /* assuming reset worked */
563 * Try to remove FS references in the specified process. This function
564 * is used during shutdown
568 shutdown_cleanup_proc(struct proc
*p
)
570 struct filedesc
*fdp
;
575 if ((fdp
= p
->p_fd
) != NULL
) {
578 cache_drop(&fdp
->fd_ncdir
);
583 cache_drop(&fdp
->fd_nrdir
);
588 cache_drop(&fdp
->fd_njdir
);
599 if (p
->p_textnch
.ncp
)
600 cache_drop(&p
->p_textnch
);
603 pmap_remove_pages(vmspace_pmap(vm
),
605 VM_MAX_USER_ADDRESS
);
606 vm_map_remove(&vm
->vm_map
,
608 VM_MAX_USER_ADDRESS
);
613 * Magic number for savecore
615 * exported (symorder) and used at least by savecore(8)
617 * Mark it as used so that gcc doesn't optimize it away.
619 __attribute__((__used__
))
620 static u_long
const dumpmag
= 0x8fca0101UL
;
622 __attribute__((__used__
))
623 static int dumpsize
= 0; /* also for savecore */
625 static int dodump
= 1;
627 SYSCTL_INT(_machdep
, OID_AUTO
, do_dump
, CTLFLAG_RW
, &dodump
, 0,
628 "Try to perform coredump on kernel panic");
631 mkdumpheader(struct kerneldumpheader
*kdh
, char *magic
, uint32_t archver
,
632 uint64_t dumplen
, uint32_t blksz
)
634 bzero(kdh
, sizeof(*kdh
));
635 strncpy(kdh
->magic
, magic
, sizeof(kdh
->magic
));
636 strncpy(kdh
->architecture
, MACHINE_ARCH
, sizeof(kdh
->architecture
));
637 kdh
->version
= htod32(KERNELDUMPVERSION
);
638 kdh
->architectureversion
= htod32(archver
);
639 kdh
->dumplength
= htod64(dumplen
);
640 kdh
->dumptime
= htod64(time_second
);
641 kdh
->blocksize
= htod32(blksz
);
642 strncpy(kdh
->hostname
, hostname
, sizeof(kdh
->hostname
));
643 strncpy(kdh
->versionstring
, version
, sizeof(kdh
->versionstring
));
644 if (panicstr
!= NULL
)
645 strncpy(kdh
->panicstring
, panicstr
, sizeof(kdh
->panicstring
));
646 kdh
->parity
= kerneldump_parity(kdh
);
650 setdumpdev(cdev_t dev
)
656 disk_dumpconf(NULL
, 0/*off*/);
662 * We have to open the device before we can perform ioctls on it,
663 * or the slice/label data may not be present. Device opens are
664 * usually tracked by specfs, but the dump device can be set in
665 * early boot and may not be open so this is somewhat of a hack.
667 doopen
= (dev
->si_sysref
.refcnt
== 1);
669 error
= dev_dopen(dev
, FREAD
, S_IFCHR
,
670 proc0
.p_ucred
, NULL
, NULL
);
674 error
= disk_dumpconf(dev
, 1/*on*/);
682 static void dump_conf (void *dummy
);
684 dump_conf(void *dummy
)
690 path
= kmalloc(MNAMELEN
, M_TEMP
, M_WAITOK
);
691 if (TUNABLE_STR_FETCH("dumpdev", path
, MNAMELEN
) != 0) {
693 * Make sure all disk devices created so far have also been
694 * probed, and also make sure that the newly created device
695 * nodes for probed disks are ready, too.
697 * XXX - Delay an additional 2 seconds to help drivers which
698 * pickup devices asynchronously and are not caught by
699 * CAM's initial probe.
702 tsleep(&_dummy
, 0, "syncer", hz
*2);
704 dev
= kgetdiskbyname(path
);
709 if (setdumpdev(dumpdev
) != 0)
713 SYSINIT(dump_conf
, SI_SUB_DUMP_CONF
, SI_ORDER_FIRST
, dump_conf
, NULL
);
716 sysctl_kern_dumpdev(SYSCTL_HANDLER_ARGS
)
721 ndumpdev
= devid_from_dev(dumpdev
);
722 error
= sysctl_handle_opaque(oidp
, &ndumpdev
, sizeof ndumpdev
, req
);
723 if (error
== 0 && req
->newptr
!= NULL
)
724 error
= setdumpdev(dev_from_devid(ndumpdev
, 0));
728 SYSCTL_PROC(_kern
, KERN_DUMPDEV
, dumpdev
, CTLTYPE_OPAQUE
|CTLFLAG_RW
,
729 0, sizeof dumpdev
, sysctl_kern_dumpdev
, "T,udev_t", "");
731 static struct panicerinfo
*panic_notifier
;
734 set_panic_notifier(struct panicerinfo
*info
)
737 panic_notifier
= NULL
;
738 else if (panic_notifier
!= NULL
)
741 panic_notifier
= info
;
747 * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
748 * and then reboots. If we are called twice, then we avoid trying to sync
749 * the disks as this often leads to recursive panics.
752 panic(const char *fmt
, ...)
754 int bootopt
, newpanic
;
755 globaldata_t gd
= mycpu
;
756 thread_t td
= gd
->gd_curthread
;
758 static char buf
[256];
761 * If a panic occurs on multiple cpus before the first is able to
762 * halt the other cpus, only one cpu is allowed to take the panic.
763 * Attempt to be verbose about this situation but if the kprintf()
764 * itself panics don't let us overrun the kernel stack.
766 * Be very nasty about descheduling our thread at the lowest
767 * level possible in an attempt to freeze the thread without
768 * inducing further panics.
770 * Bumping gd_trap_nesting_level will also bypass assertions in
771 * lwkt_switch() and allow us to switch away even if we are a
772 * FAST interrupt or IPI.
774 * The setting of panic_cpu_gd also determines how kprintf()
775 * spin-locks itself. DDB can set panic_cpu_gd as well.
778 globaldata_t xgd
= panic_cpu_gd
;
781 * Someone else got the panic cpu
783 if (xgd
&& xgd
!= gd
) {
785 ++mycpu
->gd_trap_nesting_level
;
786 if (mycpu
->gd_trap_nesting_level
< 25) {
787 kprintf("SECONDARY PANIC ON CPU %d THREAD %p\n",
788 mycpu
->gd_cpuid
, td
);
790 td
->td_release
= NULL
; /* be a grinch */
792 lwkt_deschedule_self(td
);
796 /* --mycpu->gd_trap_nesting_level */
803 if (xgd
&& xgd
== gd
)
809 if (atomic_cmpset_ptr(&panic_cpu_gd
, NULL
, gd
))
813 * Try to get the system into a working state. Save information
814 * we are about to destroy.
817 if (panicstr
== NULL
) {
818 bcopy(td
->td_toks_array
, panic_tokens
, sizeof(panic_tokens
));
819 panic_tokens_count
= td
->td_toks_stop
- &td
->td_toks_base
;
821 lwkt_relalltokens(td
);
822 td
->td_toks_stop
= &td
->td_toks_base
;
823 if (gd
->gd_spinlocks
)
824 kprintf("panic with %d spinlocks held\n", gd
->gd_spinlocks
);
825 gd
->gd_spinlocks
= 0;
830 bootopt
= RB_AUTOBOOT
| RB_DUMP
;
831 if (sync_on_panic
== 0)
832 bootopt
|= RB_NOSYNC
;
835 bootopt
|= RB_NOSYNC
;
842 * Format the panic string.
845 kvsnprintf(buf
, sizeof(buf
), fmt
, ap
);
849 if (panic_notifier
!= NULL
)
850 panic_notifier
->notifier(panic_notifier
->arg
);
851 kprintf("panic: %s\n", buf
);
852 /* two separate prints in case of an unmapped page and trap */
853 kprintf("cpuid = %d\n", mycpu
->gd_cpuid
);
855 #if (NGPIO > 0) && defined(ERROR_LED_ON_PANIC)
856 led_switch("error", 1);
859 #if defined(WDOG_DISABLE_ON_PANIC)
864 * Make sure kgdb knows who we are, there won't be a stoppcbs[]
865 * entry since our cpu wasn't stopped.
868 dumpthread
= curthread
;
871 * Enter the debugger or fall through & dump. Entering the
872 * debugger will stop cpus. If not entering the debugger stop
875 * Limit the trace history to leave more panic data on a
876 * potentially row-limited console.
880 if (newpanic
&& trace_on_panic
)
882 if (debugger_on_panic
)
887 stop_cpus(mycpu
->gd_other_cpus
);
892 * Support for poweroff delay.
894 #ifndef POWEROFF_DELAY
895 # define POWEROFF_DELAY 5000
897 static int poweroff_delay
= POWEROFF_DELAY
;
899 SYSCTL_INT(_kern_shutdown
, OID_AUTO
, poweroff_delay
, CTLFLAG_RW
,
900 &poweroff_delay
, 0, "");
903 poweroff_wait(void *junk
, int howto
)
905 if(!(howto
& RB_POWEROFF
) || poweroff_delay
<= 0)
907 DELAY(poweroff_delay
* 1000);
911 * Some system processes (e.g. syncer) need to be stopped at appropriate
912 * points in their main loops prior to a system shutdown, so that they
913 * won't interfere with the shutdown process (e.g. by holding a disk buf
914 * to cause sync to fail). For each of these system processes, register
915 * shutdown_kproc() as a handler for one of shutdown events.
917 static int kproc_shutdown_wait
= 60;
918 SYSCTL_INT(_kern_shutdown
, OID_AUTO
, kproc_shutdown_wait
, CTLFLAG_RW
,
919 &kproc_shutdown_wait
, 0, "");
922 shutdown_kproc(void *arg
, int howto
)
931 td
= (struct thread
*)arg
;
932 if ((p
= td
->td_proc
) != NULL
) {
933 kprintf("Waiting (max %d seconds) for system process `%s' to stop...",
934 kproc_shutdown_wait
, p
->p_comm
);
936 kprintf("Waiting (max %d seconds) for system thread %s to stop...",
937 kproc_shutdown_wait
, td
->td_comm
);
939 error
= suspend_kproc(td
, kproc_shutdown_wait
* hz
);
941 if (error
== EWOULDBLOCK
)
942 kprintf("timed out\n");
944 kprintf("stopped\n");
947 /* Registration of dumpers */
949 set_dumper(struct dumperinfo
*di
)
952 bzero(&dumper
, sizeof(dumper
));
956 if (dumper
.dumper
!= NULL
)
966 #if defined (_KERNEL_VIRTUAL)
967 /* vkernels don't support dumps */
968 kprintf("vkernels don't support dumps\n");
972 * If there is a dumper registered and we aren't dumping already, call
973 * the machine dependent dumpsys (md_dumpsys) to do the hard work.
975 * XXX: while right now the md_dumpsys() of x86 and x86_64 could be
976 * factored out completely into here, I rather keep them machine
977 * dependent in case we ever add a platform which does not share
978 * the same dumpsys() code, such as arm.
980 if (dumper
.dumper
!= NULL
&& !dumping
) {
986 __read_frequently
int dump_stop_usertds
= 0;
990 need_user_resched_remote(void *dummy
)
996 dump_reactivate_cpus(void)
1001 dump_stop_usertds
= 1;
1003 need_user_resched();
1005 for (cpu
= 0; cpu
< ncpus
; cpu
++) {
1006 gd
= globaldata_find(cpu
);
1007 seq
= lwkt_send_ipiq(gd
, need_user_resched_remote
, NULL
);
1008 lwkt_wait_ipiq(gd
, seq
);
1011 restart_cpus(stopped_cpus
);