Date: Sun, 01 Jun 1997 00:17:45 -0400 From: "Danny J. Zerkel" <dzerkel@phofarm.com> To: hackers@freebsd.org Subject: Crashing while making world Message-ID: <3390F7E9.41C67EA6@phofarm.com>
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I am running RELENG_2_2 within a day or two. While doing
"make libraries", my machine crashed twice, both in the
same kernel function, but called from different places.
Crash 1:
#0 boot (howto=256) at ../../kern/kern_shutdown.c:243
#1 0xf0112412 in panic (fmt=0xf019846f "page fault")
at ../../kern/kern_shutdown.c:367
#2 0xf0198fd6 in trap_fatal (frame=0xefbffecc) at
../../i386/i386/trap.c:742
#3 0xf0198ac4 in trap_pfault (frame=0xefbffecc, usermode=0)
at ../../i386/i386/trap.c:653
#4 0xf019879f in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = 0,
tf_esi = -260185244, tf_ebp = -272630000, tf_isp = -272630028,
tf_ebx = 134270976, tf_edx = 0, tf_ecx = 22847488, tf_eax = 32,
tf_trapno = 12, tf_err = 0, tf_eip = -266778562, tf_cs = 8,
tf_eflags = 66066, tf_esp = -265504772, tf_ss = -2147483648})
at ../../i386/i386/trap.c:311
#5 0xf019483e in pmap_pte_quick (pmap=0xf07de364, va=134270976)
at ../../i386/i386/pmap.c:499
#6 0xf0196fb1 in pmap_ts_referenced (pa=22847488)
at ../../i386/i386/pmap.c:2881
#7 0xf018d368 in vm_pageout_scan () at ../../vm/vm_pageout.c:794
#8 0xf018d870 in vm_pageout () at ../../vm/vm_pageout.c:1013
#9 0xf01084c6 in kproc_start (udata=0xf01d9040) at
../../kern/init_main.c:240
#10 0xf0108464 in main (framep=0xefbfffb8) at ../../kern/init_main.c:190
Crash 2:
#0 boot (howto=256) at ../../kern/kern_shutdown.c:243
#1 0xf0112412 in panic (fmt=0xf019846f "page fault")
at ../../kern/kern_shutdown.c:367
#2 0xf0198fd6 in trap_fatal (frame=0xefbffcd0) at
../../i386/i386/trap.c:742
#3 0xf0198ac4 in trap_pfault (frame=0xefbffcd0, usermode=0)
at ../../i386/i386/trap.c:653
#4 0xf019879f in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = 4096,
tf_esi = -259231644, tf_ebp = -272630508, tf_isp = -272630536,
tf_ebx = 3551232, tf_edx = 0, tf_ecx = -266270244, tf_eax = 0,
tf_trapno = 12, tf_err = 0, tf_eip = -266778562, tf_cs = 8,
tf_eflags = 66135, tf_esp = -265627400, tf_ss = 64})
at ../../i386/i386/trap.c:311
#5 0xf019483e in pmap_pte_quick (pmap=0xf08c7064, va=3551232)
at ../../i386/i386/pmap.c:499
#6 0xf0196d54 in pmap_changebit (pa=22605824, bit=64, setem=0)
at ../../i386/i386/pmap.c:2744
#7 0xf0197013 in pmap_clear_modify (pa=22605824)
at ../../i386/i386/pmap.c:2915
#8 0xf018c054 in vm_page_set_validclean (m=0xf02690d8, base=0,
size=4096)
at ../../vm/vm_page.c:1222
#9 0xf012e7d8 in vfs_page_set_valid (bp=0xf26ff352, off=0,
m=0xf02690d8)
at ../../kern/vfs_bio.c:1839
#10 0xf012e8e6 in vfs_clean_pages (bp=0xf26ff352) at
../../kern/vfs_bio.c:1896
#11 0xf012c82c in bdwrite (bp=0xf26ff352) at ../../kern/vfs_bio.c:437
#12 0xf012fb68 in cluster_write (bp=0xf26ff352, filesize=180224)
at ../../kern/vfs_cluster.c:562
#13 0xf017ac14 in ffs_write (ap=0xefbffee8)
at ../../ufs/ufs/ufs_readwrite.c:291
#14 0xf01369eb in vn_write (fp=0xf08fff80, uio=0xefbfff34,
cred=0xf0744900)
at vnode_if.h:283
#15 0xf0119dd3 in write (p=0xf0723e00, uap=0xefbfff94,
retval=0xefbfff84)
at ../../kern/sys_generic.c:263
#16 0xf019926f in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 1,
tf_esi = 602112, tf_ebp = -272639292, tf_isp = -272629788,
tf_ebx = 218420, tf_edx = 143920, tf_ecx = 7, tf_eax = 4,
tf_trapno = 0,
tf_err = 7, tf_eip = 134716593, tf_cs = 31, tf_eflags = 658,
tf_esp = -272639320, tf_ss = 39}) at ../../i386/i386/trap.c:890
Line 499 of pmap.c (pmap_pte_quick) is:
if (pde = (unsigned) pmap->pm_pdir[va >> PDRSHIFT]) {
And in both cases, pmap->pm_pdir is 0x0:
$1 = {pm_pdir = 0x0, pm_pteobj = 0xf08f0f80, pm_pvlist = {
tqh_first = 0x0, tqh_last = 0xf07de36c}, pm_count = 1, pm_flags = 0,
pm_stats = {resident_count = -1, wired_count = 0}, pm_ptphint = 0x0}
$1 = {pm_pdir = 0x0, pm_pteobj = 0x0, pm_pvlist = {tqh_first = 0x0,
tqh_last = 0x0}, pm_count = 0, pm_flags = 0, pm_stats = {
resident_count = 0, wired_count = 98724}, pm_ptphint = 0x0}
I tried to trace forward from the calling function's arguments but
was unable to find either of these pmap's within the listed pa's.
Here is the beginning of my system config:
FreeBSD 2.2-STABLE #10: Sat May 31 16:01:03 EDT 1997
root@feephi.phofarm.com:/usr/src/sys/compile/feephi
CPU: Pentium (90.74-MHz 586-class CPU)
Origin = "GenuineIntel" Id = 0x525 Stepping=5
Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
real memory = 33554432 (32768K bytes)
avail memory = 30601216 (29884K bytes)
Probing for devices on PCI bus 0:
chip0 <Intel 82434NX (Neptune) PCI cache memory controller> rev 17 on
pci0:0
chip1 <Intel 82378ZB PCI-ISA bridge> rev 3 on pci0:2
...
I'm usually pretty good at figuring out how systems got into a
panic, but this has me befuddled. Any ideas?
Danny J. Zerkel
Photon Farmers
dzerkel@phofarm.com
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