[Bug 1863710] [NEW] qemu 4.2 does not process discard(trim) commands

[Bug 1863710] [NEW] qemu 4.2 does not process discard(trim) commands

[Chris S.]

Public bug reported:

I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
commands as they are sent to the hardware.  Blktrace shows nothing as
the VM is trimming the SSDs.

I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
as the VM is trimming.

Kernel version is 5.5.4.

Attached is the libvirt xml.

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "win10-real.xml"
   https://bugs.launchpad.net/bugs/1863710/+attachment/5329158/+files/win10-real.xml

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https://bugs.launchpad.net/bugs/1863710

Title:
  qemu 4.2 does not process discard(trim) commands

Status in QEMU:
  New

Bug description:
  I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
  commands as they are sent to the hardware.  Blktrace shows nothing as
  the VM is trimming the SSDs.

  I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
  as the VM is trimming.

  Kernel version is 5.5.4.

  Attached is the libvirt xml.

To manage notifications about this bug go to:
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[Bug 1863710] Re: qemu 4.2 does not process discard(trim) commands

[Chris S.]

** Attachment removed: "win10-real.xml"
   https://bugs.launchpad.net/qemu/+bug/1863710/+attachment/5329158/+files/win10-real.xml

** Attachment added: "win10.xml"
   https://bugs.launchpad.net/qemu/+bug/1863710/+attachment/5331124/+files/win10.xml

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1863710

Title:
  qemu 4.2 does not process discard(trim) commands

Status in QEMU:
  New

Bug description:
  I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
  commands as they are sent to the hardware.  Blktrace shows nothing as
  the VM is trimming the SSDs.

  I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
  as the VM is trimming.

  Kernel version is 5.5.4.

  Attached is the libvirt xml.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1863710/+subscriptions

[Bug 1863710] Re: qemu 4.2 does not process discard(trim) commands

[Thomas Huth]

How did you start QEMU? Does this still happen with the latest version
of QEMU?

** Changed in: qemu
       Status: New => Incomplete

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devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1863710

Title:
  qemu 4.2 does not process discard(trim) commands

Status in QEMU:
  Incomplete

Bug description:
  I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
  commands as they are sent to the hardware.  Blktrace shows nothing as
  the VM is trimming the SSDs.

  I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
  as the VM is trimming.

  Kernel version is 5.5.4.

  Attached is the libvirt xml.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1863710/+subscriptions

[Bug 1863710] Re: qemu 4.2 does not process discard(trim) commands

[Thomas Huth]

I mean: Please provide the QEMU command line parameters ... is this also
reproducible without libvirt? ... otherwise it might also be a problem
in libvirt instead...

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https://bugs.launchpad.net/bugs/1863710

Title:
  qemu 4.2 does not process discard(trim) commands

Status in QEMU:
  Incomplete

Bug description:
  I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
  commands as they are sent to the hardware.  Blktrace shows nothing as
  the VM is trimming the SSDs.

  I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
  as the VM is trimming.

  Kernel version is 5.5.4.

  Attached is the libvirt xml.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1863710/+subscriptions

[Bug 1863710] Re: qemu 4.2 does not process discard(trim) commands

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1863710

Title:
  qemu 4.2 does not process discard(trim) commands

Status in QEMU:
  Expired

Bug description:
  I'm using Arch Linux with qemu 4.2 and blktrace to monitor discard
  commands as they are sent to the hardware.  Blktrace shows nothing as
  the VM is trimming the SSDs.

  I downgraded to qemu 4.1.1 and blktrace shows lots of discard commands
  as the VM is trimming.

  Kernel version is 5.5.4.

  Attached is the libvirt xml.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1863710/+subscriptions