Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
On 10/9/20 7:54 PM, Eric van Gyzen wrote: On 10/9/20 6:27 PM, Ryan Moeller wrote: On 10/9/20 6:22 PM, Alan Somers wrote: This sounds like it might be a regression introduced by the OpenZFS merge. Have you compared vdev_geom.c in OpenZFS vs the old version? -Alan I don't think vdev_geom.c is involved, we're taking a wrong path in zvol_os.c because it seems the volume is created using the default volmode and later changed to volmode=dev. Yes, you're on the right track. I tried this several times on a VM and it eventually hit the window: # zfs create -s -V 20G -o primarycache=none -o volmode=dev head_root/testvol zvol_create_minor_impl:1250[1]: Creating ZVOL head_root/testvol... zvol_create_minor_impl:1371[1]: ZVOL head_root/testvol created. Fatal trap 12: page fault while in kernel mode Let's track this in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250297 Eric ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
On 10/9/20 6:27 PM, Ryan Moeller wrote: On 10/9/20 6:22 PM, Alan Somers wrote: This sounds like it might be a regression introduced by the OpenZFS merge. Have you compared vdev_geom.c in OpenZFS vs the old version? -Alan I don't think vdev_geom.c is involved, we're taking a wrong path in zvol_os.c because it seems the volume is created using the default volmode and later changed to volmode=dev. Yes, you're on the right track. I tried this several times on a VM and it eventually hit the window: # zfs create -s -V 20G -o primarycache=none -o volmode=dev head_root/testvol zvol_create_minor_impl:1250[1]: Creating ZVOL head_root/testvol... zvol_create_minor_impl:1371[1]: ZVOL head_root/testvol created. Fatal trap 12: page fault while in kernel mode cpuid = 7; apic id = 07 fault virtual address = 0x110 fault code = supervisor read data, page not present instruction pointer = 0x20:0x82167fca stack pointer = 0x28:0xfe000edcdb30 frame pointer = 0x28:0xfe000edcdb70 code segment= base 0x0, limit 0xf, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags= interrupt enabled, resume, IOPL = 0 current process = 13 (g_down) trap number = 12 db> acttrace Tracing command zfskern pid 21 tid 100478 td 0xfe00610c9800 (CPU 6) cpustop_handler() at cpustop_handler+0x28/frame 0xfe0011880e00 ipi_nmi_handler() at ipi_nmi_handler+0x39/frame 0xfe0011880e10 trap() at trap+0x56/frame 0xfe0011880f20 nmi_calltrap() at nmi_calltrap+0x8/frame 0xfe0011880f20 --- trap 0x13, rip = 0x80c25fb2, rsp = 0xfe006168c820, rbp = 0xfe006168c830 --- lock_delay() at lock_delay+0x42/frame 0xfe006168c830 _mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xc1/frame 0xfe006168c8a0 __mtx_lock_spin_flags() at __mtx_lock_spin_flags+0xd5/frame 0xfe006168c8e0 cnputs() at cnputs+0x58/frame 0xfe006168c910 vprintf() at vprintf+0xcd/frame 0xfe006168c9e0 printf() at printf+0x43/frame 0xfe006168ca40 zvol_free() at zvol_free+0x53/frame 0xfe006168ca80 zvol_task_cb() at zvol_task_cb+0x271/frame 0xfe006168cae0 taskq_run() at taskq_run+0x1f/frame 0xfe006168cb00 taskqueue_run_locked() at taskqueue_run_locked+0xaa/frame 0xfe006168cb80 taskqueue_thread_loop() at taskqueue_thread_loop+0x94/frame 0xfe006168cbb0 fork_exit() at fork_exit+0x80/frame 0xfe006168cbf0 fork_trampoline() at fork_trampoline+0xe/frame 0xfe006168cbf0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- Tracing command geom pid 13 tid 100049 td 0xfe0011862700 (CPU 7) kdb_enter() at kdb_enter+0x37/frame 0xfe000edcd7e0 vpanic() at vpanic+0x19e/frame 0xfe000edcd830 panic() at panic+0x43/frame 0xfe000edcd890 trap_fatal() at trap_fatal+0x387/frame 0xfe000edcd8f0 trap_pfault() at trap_pfault+0x97/frame 0xfe000edcd950 trap() at trap+0x2ab/frame 0xfe000edcda60 calltrap() at calltrap+0x8/frame 0xfe000edcda60 --- trap 0xc, rip = 0x82167fca, rsp = 0xfe000edcdb30, rbp = 0xfe000edcdb70 --- zvol_geom_bio_start() at zvol_geom_bio_start+0x2a/frame 0xfe000edcdb70 g_io_schedule_down() at g_io_schedule_down+0x134/frame 0xfe000edcdba0 g_down_procbody() at g_down_procbody+0x5c/frame 0xfe000edcdbb0 fork_exit() at fork_exit+0x80/frame 0xfe000edcdbf0 fork_trampoline() at fork_trampoline+0xe/frame 0xfe000edcdbf0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- (The other CPUs were idle.) On Fri, Oct 9, 2020 at 3:48 PM Eric van Gyzen wrote: On 10/9/20 4:39 PM, Eric van Gyzen wrote: Does this look familiar? I'm creating a zvol with volmode=dev, but some geom code paths were taken. If this looks new, I'll provide more details. primarycache=none also seems to be a factor. I can easily repro with: zfs create -s -V 10G -o primarycache=none -o volmode=dev .../testvol I don't think primarycache is a factor, I can easily repro with primarycache left at the default. The volmode property is being set asynchronously and losing the race with the initial creation of the minors. When volmode is changed the minor is supposed to be destroyed and then recreated in the correct mode, but that does not seem to be working correctly. Setting vfs.zfs.debug=1 you can see in dmesg the zvol is created once in volmode=geom and then a second attempt to create the zvol fails, because zvol_free did not occur. zvol_create_minor_impl:1250[1]: Creating ZVOL p0/testvol... name=p0/testvol error=0 volmode=1 zvol_create_minor_impl:1372[1]: ZVOL p0/testvol created. zvol_create_minor_impl:1250[1]: Creating ZVOL p0/testvol... So something is preventing zv_free from being called by zvol_remove_minors_impl. -Ryan 13.0-CURRENT r366500+84ccaf49083c-c272054 GENERIC #8 #9 zvol_geom_bio_getattr (bp=0xf80376132900) at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545 #10 zvol_geom_bio_start (bp=0xf80376132900)
Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
On 10/9/20 6:22 PM, Alan Somers wrote:
This sounds like it might be a regression introduced by the OpenZFS merge.
Have you compared vdev_geom.c in OpenZFS vs the old version?
-Alan
I don't think vdev_geom.c is involved, we're taking a wrong path in
zvol_os.c because
it seems the volume is created using the default volmode and later
changed to volmode=dev.
On Fri, Oct 9, 2020 at 3:48 PM Eric van Gyzen wrote:
On 10/9/20 4:39 PM, Eric van Gyzen wrote:
Does this look familiar? I'm creating a zvol with volmode=dev, but some
geom code paths were taken. If this looks new, I'll provide more
details.
primarycache=none also seems to be a factor. I can easily repro with:
zfs create -s -V 10G -o primarycache=none -o volmode=dev .../testvol
I don't think primarycache is a factor, I can easily repro with
primarycache left at the default.
The volmode property is being set asynchronously and losing the race
with the initial creation of
the minors. When volmode is changed the minor is supposed to be
destroyed and then recreated
in the correct mode, but that does not seem to be working correctly.
Setting vfs.zfs.debug=1 you
can see in dmesg the zvol is created once in volmode=geom and then a
second attempt to create
the zvol fails, because zvol_free did not occur.
zvol_create_minor_impl:1250[1]: Creating ZVOL p0/testvol...
name=p0/testvol error=0 volmode=1
zvol_create_minor_impl:1372[1]: ZVOL p0/testvol created.
zvol_create_minor_impl:1250[1]: Creating ZVOL p0/testvol...
So something is preventing zv_free from being called by
zvol_remove_minors_impl.
-Ryan
13.0-CURRENT r366500+84ccaf49083c-c272054 GENERIC
#8
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
#10 zvol_geom_bio_start (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:519
#11 0x80b1c684 in g_io_schedule_down (tp=)
at /usr/src/sys/geom/geom_io.c:848
#12 0x80b1cfcc in g_down_procbody (arg=)
at /usr/src/sys/geom/geom_kern.c:111
(kgdb) f 9
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
545spa_t *spa = dmu_objset_spa(zv->zv_objset);
(kgdb) l
540zvol_state_t *zv;
541
542zv = bp->bio_to->private;
543ASSERT(zv != NULL);
544
545spa_t *spa = dmu_objset_spa(zv->zv_objset);
546uint64_t refd, avail, usedobjs, availobjs;
547
548if (g_handleattr_int(bp, "GEOM::candelete", 1))
549return (0);
(kgdb) p zv
$1 = (zvol_state_t *) 0x0
(kgdb) p *bp
$3 = {
bio_cmd = 4,
bio_flags = 0,
bio_cflags = 0,
bio_pflags = 0,
bio_dev = 0x0,
bio_disk = 0x0,
bio_offset = 0,
bio_bcount = 0,
bio_data = 0xf801fa687c00 "",
bio_ma = 0x0,
bio_ma_offset = 0,
bio_ma_n = 0,
bio_error = 0,
bio_resid = 0,
bio_done = 0x0,
bio_driver1 = 0x0,
bio_driver2 = 0x0,
bio_caller1 = 0x0,
bio_caller2 = 0x0,
bio_queue = {
tqe_next = 0x,
tqe_prev = 0x
},
bio_attribute = 0x81223c03 "GEOM::physpath",
bio_zone = {
zone_cmd = 0 '\000',
zone_params = {
disk_params = {
zone_mode = 0,
flags = 0,
optimal_seq_zones = 0,
optimal_nonseq_zones = 0,
max_seq_zones = 0
},
rwp = {
id = 0,
flags = 0 '\000'
},
report = {
starting_id = 0,
rep_options = 0 '\000',
header = {
same = 0 '\000',
maximum_lba = 0,
reserved = '\000'
},
entries_allocated = 0,
entries_filled = 0,
entries_available = 0,
entries = 0x0
}
}
},
bio_from = 0xf80006b92880,
bio_to = 0xf80006972500,
bio_length = 1024,
bio_completed = 0,
bio_children = 0,
bio_inbed = 0,
bio_parent = 0x0,
bio_t0 = {
sec = 50,
frac = 10248368299661698441
},
bio_task = 0x0,
bio_task_arg = 0x0,
bio_spare1 = 0x0,
bio_spare2 = 0x0,
bio_track_bp = 0x0,
bio_pblkno = 0
}
(kgdb) p *bp->bio_to
$4 = {
name = 0xf80006972598 "zvol/disco_fast/vm/onefs1-1/disk7",
provider = {
le_next = 0x0,
le_prev = 0xf80006972428
},
geom = 0xf80006972400,
consumers = {
lh_first = 0xf80006b92880
},
acr = 1,
acw = 0,
ace = 0,
error = 0,
orphan = {
tqe_next = 0x0,
tqe_prev = 0x0
},
mediasize = 5368709120,
sectorsize = 512,
stripesize = 8192,
stripeoffset = 0,
stat = 0xf80006d3d120,
spare1 = 0,
spare2 = 0,
flags = 48,
aliases = {
lh_first = 0x0
},
private = 0x0,
index = 0
}
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Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
This sounds like it might be a regression introduced by the OpenZFS merge.
Have you compared vdev_geom.c in OpenZFS vs the old version?
-Alan
On Fri, Oct 9, 2020 at 3:48 PM Eric van Gyzen wrote:
> On 10/9/20 4:39 PM, Eric van Gyzen wrote:
> > Does this look familiar? I'm creating a zvol with volmode=dev, but some
> > geom code paths were taken. If this looks new, I'll provide more
> details.
>
> primarycache=none also seems to be a factor. I can easily repro with:
>
> zfs create -s -V 10G -o primarycache=none -o volmode=dev .../testvol
>
> > 13.0-CURRENT r366500+84ccaf49083c-c272054 GENERIC
> >
> > #8
> > #9 zvol_geom_bio_getattr (bp=0xf80376132900)
> > at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
> > #10 zvol_geom_bio_start (bp=0xf80376132900)
> > at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:519
> > #11 0x80b1c684 in g_io_schedule_down (tp=)
> > at /usr/src/sys/geom/geom_io.c:848
> > #12 0x80b1cfcc in g_down_procbody (arg=)
> > at /usr/src/sys/geom/geom_kern.c:111
> >
> > (kgdb) f 9
> > #9 zvol_geom_bio_getattr (bp=0xf80376132900)
> > at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
> > 545spa_t *spa = dmu_objset_spa(zv->zv_objset);
> >
> > (kgdb) l
> > 540zvol_state_t *zv;
> > 541
> > 542zv = bp->bio_to->private;
> > 543ASSERT(zv != NULL);
> > 544
> > 545spa_t *spa = dmu_objset_spa(zv->zv_objset);
> > 546uint64_t refd, avail, usedobjs, availobjs;
> > 547
> > 548if (g_handleattr_int(bp, "GEOM::candelete", 1))
> > 549return (0);
> >
> > (kgdb) p zv
> > $1 = (zvol_state_t *) 0x0
> >
> > (kgdb) p *bp
> > $3 = {
> >bio_cmd = 4,
> >bio_flags = 0,
> >bio_cflags = 0,
> >bio_pflags = 0,
> >bio_dev = 0x0,
> >bio_disk = 0x0,
> >bio_offset = 0,
> >bio_bcount = 0,
> >bio_data = 0xf801fa687c00 "",
> >bio_ma = 0x0,
> >bio_ma_offset = 0,
> >bio_ma_n = 0,
> >bio_error = 0,
> >bio_resid = 0,
> >bio_done = 0x0,
> >bio_driver1 = 0x0,
> >bio_driver2 = 0x0,
> >bio_caller1 = 0x0,
> >bio_caller2 = 0x0,
> >bio_queue = {
> > tqe_next = 0x,
> > tqe_prev = 0x
> >},
> >bio_attribute = 0x81223c03 "GEOM::physpath",
> >bio_zone = {
> > zone_cmd = 0 '\000',
> > zone_params = {
> >disk_params = {
> > zone_mode = 0,
> > flags = 0,
> > optimal_seq_zones = 0,
> > optimal_nonseq_zones = 0,
> > max_seq_zones = 0
> >},
> >rwp = {
> > id = 0,
> > flags = 0 '\000'
> >},
> >report = {
> > starting_id = 0,
> > rep_options = 0 '\000',
> > header = {
> >same = 0 '\000',
> >maximum_lba = 0,
> >reserved = '\000'
> > },
> > entries_allocated = 0,
> > entries_filled = 0,
> > entries_available = 0,
> > entries = 0x0
> >}
> > }
> >},
> >bio_from = 0xf80006b92880,
> >bio_to = 0xf80006972500,
> >bio_length = 1024,
> >bio_completed = 0,
> >bio_children = 0,
> >bio_inbed = 0,
> >bio_parent = 0x0,
> >bio_t0 = {
> > sec = 50,
> > frac = 10248368299661698441
> >},
> >bio_task = 0x0,
> >bio_task_arg = 0x0,
> >bio_spare1 = 0x0,
> >bio_spare2 = 0x0,
> >bio_track_bp = 0x0,
> >bio_pblkno = 0
> > }
> >
> > (kgdb) p *bp->bio_to
> > $4 = {
> >name = 0xf80006972598 "zvol/disco_fast/vm/onefs1-1/disk7",
> >provider = {
> > le_next = 0x0,
> > le_prev = 0xf80006972428
> >},
> >geom = 0xf80006972400,
> >consumers = {
> > lh_first = 0xf80006b92880
> >},
> >acr = 1,
> >acw = 0,
> >ace = 0,
> >error = 0,
> >orphan = {
> > tqe_next = 0x0,
> > tqe_prev = 0x0
> >},
> >mediasize = 5368709120,
> >sectorsize = 512,
> >stripesize = 8192,
> >stripeoffset = 0,
> >stat = 0xf80006d3d120,
> >spare1 = 0,
> >spare2 = 0,
> >flags = 48,
> >aliases = {
> > lh_first = 0x0
> >},
> >private = 0x0,
> >index = 0
> > }
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Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
On 10/9/20 4:39 PM, Eric van Gyzen wrote:
Does this look familiar? I'm creating a zvol with volmode=dev, but some
geom code paths were taken. If this looks new, I'll provide more details.
primarycache=none also seems to be a factor. I can easily repro with:
zfs create -s -V 10G -o primarycache=none -o volmode=dev .../testvol
13.0-CURRENT r366500+84ccaf49083c-c272054 GENERIC
#8
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
#10 zvol_geom_bio_start (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:519
#11 0x80b1c684 in g_io_schedule_down (tp=)
at /usr/src/sys/geom/geom_io.c:848
#12 0x80b1cfcc in g_down_procbody (arg=)
at /usr/src/sys/geom/geom_kern.c:111
(kgdb) f 9
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
545 spa_t *spa = dmu_objset_spa(zv->zv_objset);
(kgdb) l
540 zvol_state_t *zv;
541
542 zv = bp->bio_to->private;
543 ASSERT(zv != NULL);
544
545 spa_t *spa = dmu_objset_spa(zv->zv_objset);
546 uint64_t refd, avail, usedobjs, availobjs;
547
548 if (g_handleattr_int(bp, "GEOM::candelete", 1))
549 return (0);
(kgdb) p zv
$1 = (zvol_state_t *) 0x0
(kgdb) p *bp
$3 = {
bio_cmd = 4,
bio_flags = 0,
bio_cflags = 0,
bio_pflags = 0,
bio_dev = 0x0,
bio_disk = 0x0,
bio_offset = 0,
bio_bcount = 0,
bio_data = 0xf801fa687c00 "",
bio_ma = 0x0,
bio_ma_offset = 0,
bio_ma_n = 0,
bio_error = 0,
bio_resid = 0,
bio_done = 0x0,
bio_driver1 = 0x0,
bio_driver2 = 0x0,
bio_caller1 = 0x0,
bio_caller2 = 0x0,
bio_queue = {
tqe_next = 0x,
tqe_prev = 0x
},
bio_attribute = 0x81223c03 "GEOM::physpath",
bio_zone = {
zone_cmd = 0 '\000',
zone_params = {
disk_params = {
zone_mode = 0,
flags = 0,
optimal_seq_zones = 0,
optimal_nonseq_zones = 0,
max_seq_zones = 0
},
rwp = {
id = 0,
flags = 0 '\000'
},
report = {
starting_id = 0,
rep_options = 0 '\000',
header = {
same = 0 '\000',
maximum_lba = 0,
reserved = '\000'
},
entries_allocated = 0,
entries_filled = 0,
entries_available = 0,
entries = 0x0
}
}
},
bio_from = 0xf80006b92880,
bio_to = 0xf80006972500,
bio_length = 1024,
bio_completed = 0,
bio_children = 0,
bio_inbed = 0,
bio_parent = 0x0,
bio_t0 = {
sec = 50,
frac = 10248368299661698441
},
bio_task = 0x0,
bio_task_arg = 0x0,
bio_spare1 = 0x0,
bio_spare2 = 0x0,
bio_track_bp = 0x0,
bio_pblkno = 0
}
(kgdb) p *bp->bio_to
$4 = {
name = 0xf80006972598 "zvol/disco_fast/vm/onefs1-1/disk7",
provider = {
le_next = 0x0,
le_prev = 0xf80006972428
},
geom = 0xf80006972400,
consumers = {
lh_first = 0xf80006b92880
},
acr = 1,
acw = 0,
ace = 0,
error = 0,
orphan = {
tqe_next = 0x0,
tqe_prev = 0x0
},
mediasize = 5368709120,
sectorsize = 512,
stripesize = 8192,
stripeoffset = 0,
stat = 0xf80006d3d120,
spare1 = 0,
spare2 = 0,
flags = 48,
aliases = {
lh_first = 0x0
},
private = 0x0,
index = 0
}
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ZFS crash -- zvol_geom_bio_getattr called when volmode=dev
Does this look familiar? I'm creating a zvol with volmode=dev, but some
geom code paths were taken. If this looks new, I'll provide more details.
Thanks in advance,
Eric
13.0-CURRENT r366500+84ccaf49083c-c272054 GENERIC
#8
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
#10 zvol_geom_bio_start (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:519
#11 0x80b1c684 in g_io_schedule_down (tp=)
at /usr/src/sys/geom/geom_io.c:848
#12 0x80b1cfcc in g_down_procbody (arg=)
at /usr/src/sys/geom/geom_kern.c:111
(kgdb) f 9
#9 zvol_geom_bio_getattr (bp=0xf80376132900)
at /usr/src/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c:545
545 spa_t *spa = dmu_objset_spa(zv->zv_objset);
(kgdb) l
540 zvol_state_t *zv;
541
542 zv = bp->bio_to->private;
543 ASSERT(zv != NULL);
544
545 spa_t *spa = dmu_objset_spa(zv->zv_objset);
546 uint64_t refd, avail, usedobjs, availobjs;
547
548 if (g_handleattr_int(bp, "GEOM::candelete", 1))
549 return (0);
(kgdb) p zv
$1 = (zvol_state_t *) 0x0
(kgdb) p *bp
$3 = {
bio_cmd = 4,
bio_flags = 0,
bio_cflags = 0,
bio_pflags = 0,
bio_dev = 0x0,
bio_disk = 0x0,
bio_offset = 0,
bio_bcount = 0,
bio_data = 0xf801fa687c00 "",
bio_ma = 0x0,
bio_ma_offset = 0,
bio_ma_n = 0,
bio_error = 0,
bio_resid = 0,
bio_done = 0x0,
bio_driver1 = 0x0,
bio_driver2 = 0x0,
bio_caller1 = 0x0,
bio_caller2 = 0x0,
bio_queue = {
tqe_next = 0x,
tqe_prev = 0x
},
bio_attribute = 0x81223c03 "GEOM::physpath",
bio_zone = {
zone_cmd = 0 '\000',
zone_params = {
disk_params = {
zone_mode = 0,
flags = 0,
optimal_seq_zones = 0,
optimal_nonseq_zones = 0,
max_seq_zones = 0
},
rwp = {
id = 0,
flags = 0 '\000'
},
report = {
starting_id = 0,
rep_options = 0 '\000',
header = {
same = 0 '\000',
maximum_lba = 0,
reserved = '\000'
},
entries_allocated = 0,
entries_filled = 0,
entries_available = 0,
entries = 0x0
}
}
},
bio_from = 0xf80006b92880,
bio_to = 0xf80006972500,
bio_length = 1024,
bio_completed = 0,
bio_children = 0,
bio_inbed = 0,
bio_parent = 0x0,
bio_t0 = {
sec = 50,
frac = 10248368299661698441
},
bio_task = 0x0,
bio_task_arg = 0x0,
bio_spare1 = 0x0,
bio_spare2 = 0x0,
bio_track_bp = 0x0,
bio_pblkno = 0
}
(kgdb) p *bp->bio_to
$4 = {
name = 0xf80006972598 "zvol/disco_fast/vm/onefs1-1/disk7",
provider = {
le_next = 0x0,
le_prev = 0xf80006972428
},
geom = 0xf80006972400,
consumers = {
lh_first = 0xf80006b92880
},
acr = 1,
acw = 0,
ace = 0,
error = 0,
orphan = {
tqe_next = 0x0,
tqe_prev = 0x0
},
mediasize = 5368709120,
sectorsize = 512,
stripesize = 8192,
stripeoffset = 0,
stat = 0xf80006d3d120,
spare1 = 0,
spare2 = 0,
flags = 48,
aliases = {
lh_first = 0x0
},
private = 0x0,
index = 0
}
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