Date: Wed, 21 Jan 1998 20:15:43 +0900 From: KATO Takenori <kato@migmatite.eps.nagoya-u.ac.jp> To: current@freebsd.org Subject: Panic while clustered I/O Message-ID: <19980121201543Z.kato@gneiss.eps.nagoya-u.ac.jp>
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Please help me.
How to repeat:
mount_union foo /usr/obj
make world
Workarround: disabling clustered I/O in ufs_readwrite.c :-(.
# gdb -k
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under certain conditions; type "show copying" to see the conditions.
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GDB 4.16 (i386-unknown-freebsd), Copyright 1996 Free Software Foundation, Inc.
(kgdb) symbol-file kernel.debug
Reading symbols from kernel.debug...done.
(kgdb) exec-file /var/crash/kernel.0
(kgdb) core-file /var/crash/vmcore.0
IdlePTD 227000
current pcb at 1d7e10
panicstr: vm_bounce_alloc: Unmapped page
panic messages:
---
panic: vm_bounce_alloc: Unmapped page
syncing disks... 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 giving up
dumping to dev 401, offset 93952
dump 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
285 dumppcb.pcb_cr3 = rcr3();
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:285
#1 0xf011511f in panic (fmt=0xf01a7389 "vm_bounce_alloc: Unmapped page")
at ../../kern/kern_shutdown.c:425
#2 0xf01a74a9 in vm_bounce_alloc (bp=0xf25028bc)
at ../../i386/i386/vm_machdep.c:356
#3 0xf017a9dd in sd_strategy (bp=0xf25028bc, sc_link=0xf050af00)
at ../../scsi/sd.c:477
#4 0xf017788c in scsi_strategy (bp=0xf25028bc, device=0xf01cf8a8)
at ../../scsi/scsi_driver.c:220
#5 0xf017a3dc in sdstrategy (bp=0xf25028bc) at ../../scsi/sd.c:127
#6 0xf014025e in spec_strategy (ap=0xf43f1e10)
at ../../miscfs/specfs/spec_vnops.c:557
#7 0xf013f939 in spec_vnoperate (ap=0xf43f1e10)
at ../../miscfs/specfs/spec_vnops.c:127
#8 0xf0187e29 in ufs_vnoperatespec (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:2242
#9 0xf018784a in ufs_strategy (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:1721
#10 0xf0187df9 in ufs_vnoperate (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:2224
#11 0xf012cb76 in bwrite (bp=0xf25028bc) at vnode_if.h:1064
#12 0xf013124a in vop_stdbwrite (ap=0xf43f1e48) at ../../kern/vfs_default.c:283
#13 0xf0131091 in vop_defaultop (ap=0xf43f1e48) at ../../kern/vfs_default.c:130
#14 0xf0187df9 in ufs_vnoperate (ap=0xf43f1e48)
at ../../ufs/ufs/ufs_vnops.c:2224
#15 0xf012cd30 in bawrite (bp=0xf25028bc) at vnode_if.h:1081
#16 0xf0130ed3 in cluster_wbuild (vp=0xf05ab400, size=8192, start_lbn=1, len=2)
at ../../kern/vfs_cluster.c:750
#17 0xf012d59f in vfs_bio_awrite (bp=0xf2525c7c) at ../../kern/vfs_bio.c:886
#18 0xf01823c7 in ffs_fsync (ap=0xf43f1f3c) at ../../ufs/ffs/ffs_vnops.c:181
#19 0xf0180bae in ffs_sync (mp=0xf0542800, waitfor=2, cred=0xf050ad00,
p=0xf0526800) at vnode_if.h:499
#20 0xf0134fc7 in sync (p=0xf0526800, uap=0x0) at ../../kern/vfs_syscalls.c:493
#21 0xf012ec21 in vfs_update () at ../../kern/vfs_bio.c:1974
#22 0xf0108b4e in kproc_start (udata=0xf01cca78) at ../../kern/init_main.c:264
#23 0xf019d573 in fork_trampoline ()
Cannot access memory at address 0x29ff000.
(kgdb) up
#1 0xf011511f in panic (fmt=0xf01a7389 "vm_bounce_alloc: Unmapped page")
at ../../kern/kern_shutdown.c:425
425 boot(bootopt);
(kgdb) up
#2 0xf01a74a9 in vm_bounce_alloc (bp=0xf25028bc)
at ../../i386/i386/vm_machdep.c:356
356 panic("vm_bounce_alloc: Unmapped page");
(kgdb) list
351 for (i = 0; i < countvmpg; i++) {
352 pa = pmap_kextract(va);
353 if (pa >= SIXTEENMEG)
354 ++dobounceflag;
355 if( pa == 0)
356 panic("vm_bounce_alloc: Unmapped page");
357 va += PAGE_SIZE;
358 }
359 if (dobounceflag == 0)
360 return;
(kgdb) print *bp
$1 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0}, b_proc = 0x0,
b_flags = 1090519124, b_qindex = 0, b_usecount = 0 '\000', b_error = 0,
b_bufsize = 8192, b_bcount = 8192, b_resid = 0, b_dev = 197637,
b_data = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>,
b_kvabase = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>, b_kvasize = 8192,
b_lblkno = 0, b_blkno = 341728, b_iodone = 0xf0130904 <cluster_callback>,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 8192,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0,
b_pblkno = 2698976, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
b_driver2 = 0x0, b_spc = 0x0, b_cluster = {cluster_head = {
tqh_first = 0xf2525c7c, tqh_last = 0xf2525d0c}, cluster_entry = {
tqe_next = 0xf2525c7c, tqe_prev = 0xf2525d0c}}, b_pages = {
0x0 <repeats 16 times>}, b_npages = 0}
(kgdb) print bp
$2 = (struct buf *) 0xf25028bc
(kgdb) up
#3 0xf017a9dd in sd_strategy (bp=0xf25028bc, sc_link=0xf050af00)
at ../../scsi/sd.c:477
477 vm_bounce_alloc(bp);
(kgdb) list
472 /*
473 * Use a bounce buffer if necessary
474 */
475 #ifdef BOUNCE_BUFFERS
476 if (sc_link->flags & SDEV_BOUNCE)
477 vm_bounce_alloc(bp);
478 #endif
479
480 /*
481 * Place it in the queue of disk activities for this disk
(kgdb) up
#4 0xf017788c in scsi_strategy (bp=0xf25028bc, device=0xf01cf8a8)
at ../../scsi/scsi_driver.c:220
220 (*device->dev_strategy)(bp, sc_link);
(kgdb) up
#5 0xf017a3dc in sdstrategy (bp=0xf25028bc) at ../../scsi/sd.c:127
127 SCSI_DEVICE_ENTRIES(sd)
(kgdb) up
#6 0xf014025e in spec_strategy (ap=0xf43f1e10)
at ../../miscfs/specfs/spec_vnops.c:557
557 (*bdevsw[major(ap->a_bp->b_dev)]->d_strategy)(ap->a_bp);
(kgdb) up
#7 0xf013f939 in spec_vnoperate (ap=0xf43f1e10)
at ../../miscfs/specfs/spec_vnops.c:127
127 return (VOCALL(spec_vnodeop_p, ap->a_desc->vdesc_offset, ap));
(kgdb) up
#8 0xf0187e29 in ufs_vnoperatespec (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:2242
2242 return (VOCALL(ufs_specop_p, ap->a_desc->vdesc_offset, ap));
(kgdb) list
2237 ufs_vnoperatespec(ap)
2238 struct vop_generic_args /* {
2239 struct vnodeop_desc *a_desc;
2240 } */ *ap;
2241 {
2242 return (VOCALL(ufs_specop_p, ap->a_desc->vdesc_offset, ap));
2243 }
2244
2245
(kgdb) up
#9 0xf018784a in ufs_strategy (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:1721
1721 VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
(kgdb) print ap
$3 = (struct vop_strategy_args *) 0xf43f1e10
(kgdb) print *ap
$4 = {a_desc = 0xf01ca784, a_bp = 0xf25028bc}
(kgdb) print *ap->a_bp
$5 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0}, b_proc = 0x0,
b_flags = 1090519124, b_qindex = 0, b_usecount = 0 '\000', b_error = 0,
b_bufsize = 8192, b_bcount = 8192, b_resid = 0, b_dev = 197637,
b_data = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>,
b_kvabase = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>, b_kvasize = 8192,
b_lblkno = 0, b_blkno = 341728, b_iodone = 0xf0130904 <cluster_callback>,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 8192,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0,
b_pblkno = 2698976, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
b_driver2 = 0x0, b_spc = 0x0, b_cluster = {cluster_head = {
tqh_first = 0xf2525c7c, tqh_last = 0xf2525d0c}, cluster_entry = {
tqe_next = 0xf2525c7c, tqe_prev = 0xf2525d0c}}, b_pages = {
0x0 <repeats 16 times>}, b_npages = 0}
(kgdb) up
#10 0xf0187df9 in ufs_vnoperate (ap=0xf43f1e10)
at ../../ufs/ufs/ufs_vnops.c:2224
2224 return (VOCALL(ufs_vnodeop_p, ap->a_desc->vdesc_offset, ap));
(kgdb) up
#11 0xf012cb76 in bwrite (bp=0xf25028bc) at vnode_if.h:1064
1064 return (VCALL((bp)->b_vp, VOFFSET(vop_strategy), &a));
(kgdb) list
1059 {
1060 struct vop_strategy_args a;
1061
1062 a.a_desc = VDESC(vop_strategy);
1063 a.a_bp = bp;
1064 return (VCALL((bp)->b_vp, VOFFSET(vop_strategy), &a));
1065 }
1066
1067 struct vop_bwrite_args {
1068 struct vnodeop_desc *a_desc;
(kgdb) print *bp
$6 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0}, b_proc = 0x0,
b_flags = 1090519124, b_qindex = 0, b_usecount = 0 '\000', b_error = 0,
b_bufsize = 8192, b_bcount = 8192, b_resid = 0, b_dev = 197637,
b_data = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>,
b_kvabase = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>, b_kvasize = 8192,
b_lblkno = 0, b_blkno = 341728, b_iodone = 0xf0130904 <cluster_callback>,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 8192,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0,
b_pblkno = 2698976, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
b_driver2 = 0x0, b_spc = 0x0, b_cluster = {cluster_head = {
tqh_first = 0xf2525c7c, tqh_last = 0xf2525d0c}, cluster_entry = {
tqe_next = 0xf2525c7c, tqe_prev = 0xf2525d0c}}, b_pages = {
0x0 <repeats 16 times>}, b_npages = 0}
(kgdb) up
#12 0xf013124a in vop_stdbwrite (ap=0xf43f1e48) at ../../kern/vfs_default.c:283
283 return (bwrite(ap->a_bp));
(kgdb) print
$7 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0}, b_proc = 0x0,
b_flags = 1090519124, b_qindex = 0, b_usecount = 0 '\000', b_error = 0,
b_bufsize = 8192, b_bcount = 8192, b_resid = 0, b_dev = 197637,
b_data = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>,
b_kvabase = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>, b_kvasize = 8192,
b_lblkno = 0, b_blkno = 341728, b_iodone = 0xf0130904 <cluster_callback>,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 8192,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0,
b_pblkno = 2698976, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
b_driver2 = 0x0, b_spc = 0x0, b_cluster = {cluster_head = {
tqh_first = 0xf2525c7c, tqh_last = 0xf2525d0c}, cluster_entry = {
tqe_next = 0xf2525c7c, tqe_prev = 0xf2525d0c}}, b_pages = {
0x0 <repeats 16 times>}, b_npages = 0}
(kgdb) up
#13 0xf0131091 in vop_defaultop (ap=0xf43f1e48) at ../../kern/vfs_default.c:130
130 return (VOCALL(default_vnodeop_p, ap->a_desc->vdesc_offset, ap));
(kgdb) up
#14 0xf0187df9 in ufs_vnoperate (ap=0xf43f1e48)
at ../../ufs/ufs/ufs_vnops.c:2224
2224 return (VOCALL(ufs_vnodeop_p, ap->a_desc->vdesc_offset, ap));
(kgdb) up
#15 0xf012cd30 in bawrite (bp=0xf25028bc) at vnode_if.h:1081
1081 return (VCALL((bp)->b_vp, VOFFSET(vop_bwrite), &a));
(kgdb) print *bp
Cannot access memory at address 0x0.
(kgdb) pritn bp
Undefined command: "pritn". Try "help".
(kgdb) print bp
$8 = (struct buf *) 0x0
(kgdb) print *(struct buf *)(struct buf *)0xf225028bc
Numeric constant too large.
(kgdb) print *(struct buf *)0xf225028bc[1P
$9 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0}, b_proc = 0x0,
b_flags = 1090519124, b_qindex = 0, b_usecount = 0 '\000', b_error = 0,
b_bufsize = 8192, b_bcount = 8192, b_resid = 0, b_dev = 197637,
b_data = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>,
b_kvabase = 0xf3aaa000 <Address 0xf3aaa000 out of bounds>, b_kvasize = 8192,
b_lblkno = 0, b_blkno = 341728, b_iodone = 0xf0130904 <cluster_callback>,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 8192,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0,
b_pblkno = 2698976, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
b_driver2 = 0x0, b_spc = 0x0, b_cluster = {cluster_head = {
tqh_first = 0xf2525c7c, tqh_last = 0xf2525d0c}, cluster_entry = {
tqe_next = 0xf2525c7c, tqe_prev = 0xf2525d0c}}, b_pages = {
0x0 <repeats 16 times>}, b_npages = 0}
(kgdb) up
#16 0xf0130ed3 in cluster_wbuild (vp=0xf05ab400, size=8192, start_lbn=1, len=2)
at ../../kern/vfs_cluster.c:750
750 bawrite(bp);
(kgdb) print *vp
$10 = {v_flag = 8192, v_usecount = 2, v_writecount = 0, v_holdcnt = 3,
v_lastr = 0, v_id = 2731, v_mount = 0xf0542800, v_op = 0xf0517c00,
v_freelist = {tqe_next = 0xf05b1e00, tqe_prev = 0xf01e077c}, v_mntvnodes = {
le_next = 0xf05ac200, le_prev = 0xf0542814}, v_cleanblkhd = {
lh_first = 0xf2525c7c}, v_dirtyblkhd = {lh_first = 0xf252a588},
v_numoutput = 2, v_type = VREG, v_un = {vu_mountedhere = 0x0,
vu_socket = 0x0, vu_specinfo = 0x0, vu_fifoinfo = 0x0}, v_lease = 0x0,
v_lastw = 1, v_cstart = 0, v_lasta = 341744, v_clen = 7,
v_object = 0xf46d4000, v_interlock = {lock_data = 0}, v_vnlock = 0x0,
v_tag = VT_UFS, v_data = 0xf05b1100, v_cache_src = {lh_first = 0x0},
v_cache_dst = {tqh_first = 0xf05a23c0, tqh_last = 0xf05a23d0},
v_dd = 0xf05ab400, v_ddid = 0, v_pollinfo = {vpi_lock = {lock_data = 0},
vpi_selinfo = {si_pid = 0, si_flags = 0}, vpi_events = 0, vpi_revents = 0}}
(kgdb) print tbp
$11 = (struct buf *) 0xf252a588
(kgdb) print *tbp
$12 = {b_hash = {le_next = 0x0, le_prev = 0xf252b94c}, b_vnbufs = {
le_next = 0xf252c7e8, le_prev = 0xf05ab434}, b_freelist = {
tqe_next = 0xf252c7e8, tqe_prev = 0xf2507020}, b_act = {tqe_next = 0x0,
tqe_prev = 0x0}, b_proc = 0x0, b_flags = 537002656, b_qindex = 2,
b_usecount = 15 '\017', b_error = 0, b_bufsize = 8192, b_bcount = 8192,
b_resid = 0, b_dev = 4294967295,
b_data = 0xf2db9000 "ype.h /usr/include/runetype.h /usr/include/stdlib.h \\\n /usr/include/unistd.h /usr/src/usr.bin/make/sprite.h \\\n /usr/src/usr.bin/make/lst.h /usr/include/sys/param.h \\\n /usr/include/sys/syslimits.h /usr"...,
b_kvabase = 0xf2db9000 "ype.h /usr/include/runetype.h /usr/include/stdlib.h \\\n /usr/include/unistd.h /usr/src/usr.bin/make/sprite.h \\\n /usr/src/usr.bin/make/lst.h /usr/include/sys/param.h \\\n /usr/include/sys/syslimits.h /usr"...,
b_kvasize = 8192, b_lblkno = 1, b_blkno = 341744, b_iodone = 0,
b_iodone_chain = 0x0, b_vp = 0xf05ab400, b_dirtyoff = 0, b_dirtyend = 0,
b_rcred = 0x0, b_wcred = 0x0, b_validoff = 0, b_validend = 0, b_pblkno = 0,
b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0, b_driver2 = 0x0,
b_spc = 0x0, b_cluster = {cluster_head = {tqh_first = 0x0, tqh_last = 0x0},
cluster_entry = {tqe_next = 0x0, tqe_prev = 0x0}}, b_pages = {0xf02af100,
0xf02a2134, 0x0 <repeats 14 times>}, b_npages = 2}
(kgdb) up
#17 0xf012d59f in vfs_bio_awrite (bp=0xf2525c7c) at ../../kern/vfs_bio.c:886
886 nwritten = cluster_wbuild(vp, size, lblkno, ncl);
(kgdb) up
#18 0xf01823c7 in ffs_fsync (ap=0xf43f1f3c) at ../../ufs/ffs/ffs_vnops.c:181
181 vfs_bio_awrite(bp);
(kgdb) up
#19 0xf0180bae in ffs_sync (mp=0xf0542800, waitfor=2, cred=0xf050ad00,
p=0xf0526800) at vnode_if.h:499
499 return (VCALL(vp, VOFFSET(vop_fsync), &a));
(kgdb) print *vp
$13 = {v_flag = 8192, v_usecount = 2, v_writecount = 0, v_holdcnt = 3,
v_lastr = 0, v_id = 2731, v_mount = 0xf0542800, v_op = 0xf0517c00,
v_freelist = {tqe_next = 0xf05b1e00, tqe_prev = 0xf01e077c}, v_mntvnodes = {
le_next = 0xf05ac200, le_prev = 0xf0542814}, v_cleanblkhd = {
lh_first = 0xf2525c7c}, v_dirtyblkhd = {lh_first = 0xf252a588},
v_numoutput = 2, v_type = VREG, v_un = {vu_mountedhere = 0x0,
vu_socket = 0x0, vu_specinfo = 0x0, vu_fifoinfo = 0x0}, v_lease = 0x0,
v_lastw = 1, v_cstart = 0, v_lasta = 341744, v_clen = 7,
v_object = 0xf46d4000, v_interlock = {lock_data = 0}, v_vnlock = 0x0,
v_tag = VT_UFS, v_data = 0xf05b1100, v_cache_src = {lh_first = 0x0},
v_cache_dst = {tqh_first = 0xf05a23c0, tqh_last = 0xf05a23d0},
v_dd = 0xf05ab400, v_ddid = 0, v_pollinfo = {vpi_lock = {lock_data = 0},
vpi_selinfo = {si_pid = 0, si_flags = 0}, vpi_events = 0, vpi_revents = 0}}
(kgdb) up
#20 0xf0134fc7 in sync (p=0xf0526800, uap=0x0) at ../../kern/vfs_syscalls.c:493
493 VFS_SYNC(mp, MNT_NOWAIT, p != NULL ? p->p_ucred : NOCRED, p);
(kgdb) up
#21 0xf012ec21 in vfs_update () at ../../kern/vfs_bio.c:1974
1974 sync(curproc, NULL);
(kgdb) up
#22 0xf0108b4e in kproc_start (udata=0xf01cca78) at ../../kern/init_main.c:264
264 (*kp->func)();
(kgdb) up
#23 0xf019d573 in fork_trampoline ()
(kgdb) up
Cannot access memory at address 0x29ff000.
(kgdb) quit
----
KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>
Dept. Earth Planet. Sci., Nagoya Univ., Nagoya, 464-01, Japan
PGP public key: finger kato@eclogite.eps.nagoya-u.ac.jp
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