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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1794242078; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=iiUDwZRbAkgqY2QPfx4BlURUZGpjxrFpjFKOEkUzUnY=; b=ZAHvNbRgG9bHrJSlmxMPJgVhztXuw6KkS1ZJlqaL6htdJ/Qhg0rwJvDIbPu1czr9HbGkCl ZaTutAbhU28y225TJyS0oqUoX5rmdIRMNuzL5OHjuNjlyB/6wCTC4henWTUwpNBdYTa1Em n3Zmbm3Uy2pHG+NNrEAg/i+FJY4jjzM= X-MC-Unique: vdLQ5tkyOQiPaHF1szWrEw-1 X-Mimecast-MFC-AGG-ID: vdLQ5tkyOQiPaHF1szWrEw_1794242073 From: Stefan Hajnoczi To: qemu-devel@nongnu.org, Cc: Pierrick Bouvier , Kevin Wolf , devel@lists.libvirt.org, Daniel Berrange , Stefan Hajnoczi Subject: [PATCH for-12] qed: deprecate the block driver Date: Mon, 9 Nov 2026 09:34:31 -0700 Message-ID: <20261109163431.443983-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" It has been unofficially deprecated on the wiki for many years: https://wiki.qemu.org/Features/QED Signed-off-by: Stefan Hajnoczi --- docs/about/deprecated.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 0891bbc44de..ab83626af0b 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -526,3 +526,16 @@ If the user requests a modern x86 CPU model (i.e. not = one of ``486``, ``athlon``, ``kvm32``, ``pentium``, ``pentium2``, ``pentium3``or ``qemu32`= `) a warning will be displayed until a future QEMU version when such CPUs will be rejected. + +Block drivers +------------- + +QED (since 12.0) +'''''''''''''''' + +The QED disk image format is not actively maintained and qcow2 has exceede= d its +features and performance for many years. Since QED was never widely deploy= ed, +the format is not required for compatibility reasons. It is unlikely that +qemu-img users still need to convert images to or from QED. + +Use qcow2 instead of QED. --=20 2.56.0