Hi,
Today we had vfs related panic on 7.1-RELEASE-p5. Does anybody have any idea?
Might it have already been fixed in later versions?
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc07fd34b
stack pointer = 0x28:0xe6a97bc8
frame pointer = 0x28:0xe6a97bdc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 49 (vnlru)
trap number = 12
panic: page fault
cpuid = 2
Uptime: 11h19m41s
Physical memory: 3059 MB
Dumping 275 MB: 260 244 228 212 196 180 164 148 132 116 100 84 68 52 36 20 4
(kgdb) where
#0 doadump () at pcpu.h:196
#1 0xc07910a7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2 0xc0791379 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:574
#3 0xc0aa7bcc in trap_fatal (frame=0xe6a97b88, eva=0) at
/usr/src/sys/i386/i386/trap.c:939
#4 0xc0aa7e50 in trap_pfault (frame=0xe6a97b88, usermode=0, eva=0) at
/usr/src/sys/i386/i386/trap.c:852
#5 0xc0aa880c in trap (frame=0xe6a97b88) at /usr/src/sys/i386/i386/trap.c:530
#6 0xc0a8e67b in calltrap () at /usr/src/sys/i386/i386/exception.s:159
#7 0xc07fd34b in cache_zap (ncp=0xcc33783c) at
/usr/src/sys/kern/vfs_cache.c:276
#8 0xc07fd57c in cache_purge (vp=0xc890533c) at
/usr/src/sys/kern/vfs_cache.c:613
#9 0xc080df18 in vgonel (vp=0xc890533c) at /usr/src/sys/kern/vfs_subr.c:2545
#10 0xc081174d in vnlru_free (count=270) at /usr/src/sys/kern/vfs_subr.c:870
#11 0xc0811ddc in vnlru_proc () at /usr/src/sys/kern/vfs_subr.c:733
#12 0xc076cc19 in fork_exit (callout=0xc0811cf0 <vnlru_proc>, arg=0x0,
frame=0xe6a97d38)
at /usr/src/sys/kern/kern_fork.c:804
#13 0xc0a8e6f0 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:264
267 static void
268 cache_zap(ncp)
269 struct namecache *ncp;
270 {
271 struct vnode *vp;
272
273 mtx_assert(&cache_lock, MA_OWNED);
274 CTR2(KTR_VFS, "cache_zap(%p) vp %p", ncp, ncp->nc_vp);
275 vp = NULL;
276 LIST_REMOVE(ncp, nc_hash);
277 LIST_REMOVE(ncp, nc_src);
278 if (LIST_EMPTY(&ncp->nc_dvp->v_cache_src)) {
279 vp = ncp->nc_dvp;
280 numcachehv--;
281 }
282 if (ncp->nc_vp) {
283 TAILQ_REMOVE(&ncp->nc_vp->v_cache_dst, ncp, nc_dst);
284 ncp->nc_vp->v_dd = NULL;
285 } else {
286 TAILQ_REMOVE(&ncneg, ncp, nc_dst);
287 numneg--;
288 }
289 numcache--;
290 cache_free(ncp);
291 if (vp)
292 vdrop(vp);
293 }
603 void
604 cache_purge(vp)
605 struct vnode *vp;
606 {
607
608 CTR1(KTR_VFS, "cache_purge(%p)", vp);
609 CACHE_LOCK();
610 while (!LIST_EMPTY(&vp->v_cache_src))
611 cache_zap(LIST_FIRST(&vp->v_cache_src));
612 while (!TAILQ_EMPTY(&vp->v_cache_dst))
613 cache_zap(TAILQ_FIRST(&vp->v_cache_dst));
614 vp->v_dd = NULL;
615 CACHE_UNLOCK();
616 }
(kgdb) fr 8
#8 0xc07fd57c in cache_purge (vp=0xc890533c) at
/usr/src/sys/kern/vfs_cache.c:613
613 struct namecache *ncp, *nnp;
(kgdb) p *vp
$1 = {v_type = VREG, v_tag = 0xc0b37e38 "ufs", v_op = 0xc0bfbdc0, v_data = 0x0,
v_mount = 0x0,
v_nmntvnodes = {tqe_next = 0xcc342450, tqe_prev = 0xcc31e350}, v_un =
{vu_mount = 0x0, vu_socket = 0x0,
vu_cdev = 0x0, vu_fifoinfo = 0x0, vu_yield = 0}, v_hashlist = {le_next =
0x0, le_prev = 0xc65e99fc},
v_hash = 6643674, v_cache_src = {lh_first = 0x0}, v_cache_dst = {tqh_first =
0xcc33783c,
tqh_last = 0xcc33784c}, v_dd = 0x0, v_cstart = 0, v_lasta = 0, v_lastw = 0,
v_clen = 0, v_lock = {
lk_object = {lo_name = 0xc0b37e38 "ufs", lo_type = 0xc0b37e38 "ufs",
lo_flags = 70844416,
lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}},
lk_interlock = 0xc0c42d10,
lk_flags = 262208, lk_sharecount = 0, lk_waitcount = 0, lk_exclusivecount =
1, lk_prio = 80,
lk_timo = 51, lk_lockholder = 0xc64bf8c0, lk_newlock = 0x0}, v_interlock =
{lock_object = {
lo_name = 0xc0b418b9 "vnode interlock", lo_type = 0xc0b418b9 "vnode
interlock",
lo_flags = 16973824, lo_witness_data = {lod_list = {stqe_next = 0x0},
lod_witness = 0x0}},
mtx_lock = 4, mtx_recurse = 0}, v_vnlock = 0xc8905394, v_holdcnt = 1,
v_usecount = 0, v_iflag = 128,
v_vflag = 0, v_writecount = 0, v_freelist = {tqe_next = 0xcc30acf0, tqe_prev
= 0xc0c4f3ac}, v_bufobj = {
bo_mtx = 0xc89053c4, bo_clean = {bv_hd = {tqh_first = 0x0, tqh_last =
0xc8905400}, bv_root = 0x0,
bv_cnt = 0}, bo_dirty = {bv_hd = {tqh_first = 0x0, tqh_last =
0xc8905410}, bv_root = 0x0,
bv_cnt = 0}, bo_numoutput = 0, bo_flag = 0, bo_ops = 0xc0be8e40, bo_bsize
= 16384, bo_object = 0x0,
bo_synclist = {le_next = 0x0, le_prev = 0xc890520c}, bo_private =
0xc890533c,
__bo_vnode = 0xc890533c}, v_pollinfo = 0x0, v_label = 0x0, v_lockf = 0x0}
(kgdb) fr 7
#7 0xc07fd34b in cache_zap (ncp=0xcc33783c) at
/usr/src/sys/kern/vfs_cache.c:276
276 LIST_REMOVE(ncp, nc_hash);
(kgdb) p *ncp
$2 = {nc_hash = {le_next = 0x0, le_prev = 0x0}, nc_src = {le_next = 0xcc31650c,
le_prev = 0xcc2c51e4},
nc_dst = {tqe_next = 0x0, tqe_prev = 0x0}, nc_dvp = 0x0, nc_vp = 0x0, nc_flag
= 0 '\0',
nc_nlen = 0 '\0', nc_name = 0xcc33785e ""}
--
Mikolaj Golub
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