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Bug#706999: marked as done (Writing ISO to USB results in an unkillable blkid process)

Your message dated Sat, 24 Apr 2021 08:18:55 -0700 (PDT)
with message-id <608436df.1c69fb81.1d74d.443e@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #706999,
regarding Writing ISO to USB results in an unkillable blkid process
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
706999: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=706999
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: udev
Version: 175-7.2
Severity: normal

When attempting to write an ISO installer image to a USB stick, at some
point there is an unkillable blkid process (state: uninterruptible
sleep) and syslog gets spammed with the following message once every second:

    # dd if=debian-7.0.0-i386-DVD-1.iso of=/dev/sdh bs=4k

    syslog output:
    ...
    May  6 19:49:10 desktop udevd[6290]: timeout: killing '/sbin/blkid -o udev -p /dev/sdh' [8357]
    May  6 19:49:11 desktop udevd[6290]: timeout: killing '/sbin/blkid -o udev -p /dev/sdh' [8357]
    May  6 19:49:12 desktop udevd[6290]: timeout: killing '/sbin/blkid -o udev -p /dev/sdh' [8357]
    May  6 19:49:13 desktop udevd[6290]: timeout: killing '/sbin/blkid -o udev -p /dev/sdh' [8357]
    May  6 19:49:14 desktop udevd[6290]: timeout: killing '/sbin/blkid -o udev -p /dev/sdh' [8357]
    ...

    # ps -C blkid -o pid,state,user,group,etime,cls,cmd
      PID S USER     GROUP        ELAPSED CLS CMD
     8357 D root     root           59:51  TS /sbin/blkid -o udev -p /dev/sdh
         ^^^                      ^^^^^^^

When the write finishes, this gets logged to syslog:

    May  6 20:11:31 desktop udevd[6290]: '/sbin/blkid -o udev -p /dev/sdh' [8357] terminated by signal 9 (Killed)
    May  6 20:11:31 desktop udevd[6290]: timeout 'udisks-part-id /dev/sdh'


During this time, I/O performance to the device severely suffers -- the
ISO write takes about 90 minutes to complete instead of the usual <10 mins.

I wasn't sure whether this was a bug in how udevd calls blkid, or in blkid
(from util-linux), or udisks-part-id (from udisks), so please reassign as
necessary.

Christian



-- System Information:
Debian Release: 7.0 
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages udev depends on: 
ii  debconf [debconf-2.0]  1.5.49
ii  libc6                  2.13-38
ii  libselinux1            2.1.9-5
ii  libudev0               175-7.2
ii  lsb-base               4.1+Debian8
ii  procps                 1:3.3.3-3
ii  util-linux             2.20.1-5.3

Versions of packages udev recommends:
ii  pciutils  1:3.1.9-6
ii  usbutils  1:005-3

udev suggests no packages.

-- debconf information:
  udev/new_kernel_needed: false
  udev/title/upgrade:
  udev/reboot_needed:
  udev/sysfs_deprecated_incompatibility:

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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