Re: kern.proc.pathname failure while booting from zfs

From: Frederic Chardon <chardon.frederic_at_gmail.com>
Date: Tue, 23 Aug 2016 20:24:36 +0200
2016-08-23 19:35 GMT+02:00 Frederic Chardon <chardon.frederic_at_gmail.com>:
> 2016-08-23 9:35 GMT+02:00 Konstantin Belousov <kostikbel_at_gmail.com>:
>> On Tue, Aug 23, 2016 at 09:27:56AM +0200, Frederic Chardon wrote:
>>> Le 20 ao??t 2016 22:03, "Frederic Chardon" <chardon.frederic_at_gmail.com> a
>>> ??crit :
>>> >
>>> > Hi
>>> >
>>> > I see a strange interaction between zfs on root and kern.proc.pathname
>>> > on my laptop. Whenever I try to use gcore it fails with:
>>> > gcore 1023
>>> > gcore: kern.proc.pathname failure
>>> >
>>> > However, gcore /usr/local/bin/zsh 1023 is working properly.
>>> >
>>> > I made some tests booting from usb stick (fresh installworld, no
>>> > src.conf, no make.conf, GENERIC kernel)
>>> > What works: having / on ufs and importing a zfs pool later on.
>>> > What doesn't: having / on zfs, whatever the settings for checksum,
>>> > compression, or normalization.
>>> >
>>> > Both 11-stable and 12-current behave this way. Current from may-june
>>> > worked properly.
>>> > adb, chromium and virtualbox as well stopped working at approximately
>>> > the same time, however I don't know if it is linked ("truss -f adb
>>> > start-server" shows that garbage is passed to execl after forking).
>>> >
>>> > Any idea what's going on? Does anybody else see this?
>>> >
>>> > Thanks!
>>>
>>> Nobody else have this problem? I reinstalled the system from scratch and
>>> still gcore fails with the same error, even in single user mode.
>>
>> Do you have a property on your root fs which forces it to ignore case in
>> the file names ?
>
> No. I do have normalization set to formC though. I observed the same
> behavior with the property unset (in fact, with no property set to
> anything but default as well).
> If I boot from usb stick and import the pool afterwards it works properly.
>
> zpool get all zbase
> NAME   PROPERTY                       VALUE                          SOURCE
> zbase  size                           9,94G                          -
> zbase  capacity                       43%                            -
> zbase  altroot                        -                              default
> zbase  health                         ONLINE                         -
> zbase  guid                           8964242380523899513            default
> zbase  version                        -                              default
> zbase  bootfs                         zbase/bootenv/11-STABLE        local
> zbase  delegation                     on                             default
> zbase  autoreplace                    off                            default
> zbase  cachefile                      -                              default
> zbase  failmode                       wait                           default
> zbase  listsnapshots                  off                            default
> zbase  autoexpand                     off                            default
> zbase  dedupditto                     0                              default
> zbase  dedupratio                     1.00x                          -
> zbase  free                           5,65G                          -
> zbase  allocated                      4,29G                          -
> zbase  readonly                       off                            -
> zbase  comment                        -                              default
> zbase  expandsize                     -                              -
> zbase  freeing                        0                              default
> zbase  fragmentation                  41%                            -
> zbase  leaked                         0                              default
> zbase  feature_at_async_destroy          enabled                        local
> zbase  feature_at_empty_bpobj            active                         local
> zbase  feature_at_lz4_compress           active                         local
> zbase  feature_at_multi_vdev_crash_dump  enabled                        local
> zbase  feature_at_spacemap_histogram     active                         local
> zbase  feature_at_enabled_txg            active                         local
> zbase  feature_at_hole_birth             active                         local
> zbase  feature_at_extensible_dataset     enabled                        local
> zbase  feature_at_embedded_data          active                         local
> zbase  feature_at_bookmarks              enabled                        local
> zbase  feature_at_filesystem_limits      enabled                        local
> zbase  feature_at_large_blocks           enabled                        local
> zbase  feature_at_sha512                 enabled                        local
> zbase  feature_at_skein                  enabled                        local
>
>
> zfs get all zbase/bootenv/11-STABLE
> NAME                     PROPERTY              VALUE                     SOURCE
> zbase/bootenv/11-STABLE  type                  filesystem                -
> zbase/bootenv/11-STABLE  creation              sam. août 20 13:07 2016  -
> zbase/bootenv/11-STABLE  used                  4,23G                     -
> zbase/bootenv/11-STABLE  available             5,34G                     -
> zbase/bootenv/11-STABLE  referenced            2,72G                     -
> zbase/bootenv/11-STABLE  compressratio         1.97x                     -
> zbase/bootenv/11-STABLE  mounted               yes                       -
> zbase/bootenv/11-STABLE  quota                 none                      default
> zbase/bootenv/11-STABLE  reservation           none                      default
> zbase/bootenv/11-STABLE  recordsize            128K                      default
> zbase/bootenv/11-STABLE  mountpoint            /                         local
> zbase/bootenv/11-STABLE  sharenfs              off                       default
> zbase/bootenv/11-STABLE  checksum              sha256
>   inherited from zbase
> zbase/bootenv/11-STABLE  compression           lz4
>   inherited from zbase
> zbase/bootenv/11-STABLE  atime                 off
>   inherited from zbase
> zbase/bootenv/11-STABLE  devices               on                        default
> zbase/bootenv/11-STABLE  exec                  on                        default
> zbase/bootenv/11-STABLE  setuid                on                        default
> zbase/bootenv/11-STABLE  readonly              off                       default
> zbase/bootenv/11-STABLE  jailed                off                       default
> zbase/bootenv/11-STABLE  snapdir               hidden                    default
> zbase/bootenv/11-STABLE  aclmode               discard                   default
> zbase/bootenv/11-STABLE  aclinherit            restricted                default
> zbase/bootenv/11-STABLE  canmount              on                        local
> zbase/bootenv/11-STABLE  xattr                 off
>   temporary
> zbase/bootenv/11-STABLE  copies                1                         default
> zbase/bootenv/11-STABLE  version               5                         -
> zbase/bootenv/11-STABLE  utf8only              on                        -
> zbase/bootenv/11-STABLE  normalization         formC                     -
> zbase/bootenv/11-STABLE  casesensitivity       sensitive                 -
> zbase/bootenv/11-STABLE  vscan                 off                       default
> zbase/bootenv/11-STABLE  nbmand                off                       default
> zbase/bootenv/11-STABLE  sharesmb              off                       default
> zbase/bootenv/11-STABLE  refquota              none                      default
> zbase/bootenv/11-STABLE  refreservation        none                      default
> zbase/bootenv/11-STABLE  primarycache          all                       default
> zbase/bootenv/11-STABLE  secondarycache        all                       default
> zbase/bootenv/11-STABLE  usedbysnapshots       1,52G                     -
> zbase/bootenv/11-STABLE  usedbydataset         2,72G                     -
> zbase/bootenv/11-STABLE  usedbychildren        0                         -
> zbase/bootenv/11-STABLE  usedbyrefreservation  0                         -
> zbase/bootenv/11-STABLE  logbias               latency                   default
> zbase/bootenv/11-STABLE  dedup                 off                       default
> zbase/bootenv/11-STABLE  mlslabel                                        -
> zbase/bootenv/11-STABLE  sync                  disabled
>   inherited from zbase
> zbase/bootenv/11-STABLE  refcompressratio      1.96x                     -
> zbase/bootenv/11-STABLE  written               37,6M                     -
> zbase/bootenv/11-STABLE  logicalused           7,82G                     -
> zbase/bootenv/11-STABLE  logicalreferenced     4,95G                     -
> zbase/bootenv/11-STABLE  volmode               default                   default
> zbase/bootenv/11-STABLE  filesystem_limit      none                      default
> zbase/bootenv/11-STABLE  snapshot_limit        none                      default
> zbase/bootenv/11-STABLE  filesystem_count      none                      default
> zbase/bootenv/11-STABLE  snapshot_count        none                      default
> zbase/bootenv/11-STABLE  redundant_metadata    all                       default

I meant: "if I boot from a _UFS_ usb stick" of course. The FreeBSD
installation img for example.
Received on Tue Aug 23 2016 - 16:24:38 UTC

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