Re: ZFS crash -- zvol_geom_bio_getattr called when volmode=dev

2020-10-09 Thread Eric van Gyzen

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

2020-10-09 Thread Ryan Moeller



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

2020-10-09 Thread Alan Somers
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

2020-10-09 Thread Eric van Gyzen

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

2020-10-09 Thread Eric van Gyzen
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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Core Team Office Hours 4

2020-10-09 Thread FreeBSD Core Team Secretary
Based on the continuity of our last CORE Office Hours The FreeBSD CORE Team 
would like to invite you all to a virtual town hall meeting. As mentioned 
earlier this session is timed at 0200 UTC on 14th October, 2020 geared towards 
the other part of the World but everyone is welcome to join. See 
https://wiki.freebsd.org/OfficeHours for details on how to join either a live 
stream to watch, or an interactive meeting to participate. A link to this 
agenda (and any updates) will be there as well.

We’ll be discussing the following topics and taking general questions at the 
end. We’ll have a moderator who will help call on people in the meeting to ask 
questions (or to offer comments) as well as relay relevant questions from IRC.

a. Git Transition -- To raise awareness, Ed Maste and Warner Losh will be 
giving a brief presentation about the state of the project’s planned transition 
to git. They can answer a few questions here, but are also planning an entire 
office hours on the git transition (tentatively scheduled in two weeks).

b. Recruiting for project teams -- When a new core team takes over, it’s a good 
time to assess the needs of each of the teams that we have running different 
aspects of the project, such as administering our machines and helping keep 
FreeBSD secure. One common theme is the need for more help. We’ll discuss what 
teams there are, and make a recruiting pitch and answer any questions.

c. Core TODO List publishing -- To continue the openness initiative, the core 
team will start publishing out TODO list. This will be in addition to the 
normal meeting minutes and other openness ideas. The new core team would love 
to hear from the community how to improve our communications.

d. General Questions -- Time permitting, the core team can answer any other 
questions or concerns the community might have.

Thanks! We look forward to meeting you.

Regards,
Moin (bofh), with core-secretary@ hat on


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