Re: [libvirt] [libvirt PATCH] qemu: Support discard for disk

QEMU introduced "discard" option for drive since commit a9384aff53, <...> @var{discard} is one of "ignore" (or "off") or "unmap" (or "on") and controls whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap}) requests are ignored or passed to the filesystem. Some machine types may not support discard requests. </...> This patch exposes the support in libvirt. QEMU supported "discard" for "-drive" since v1.5.0-rc0: % git tag --contains a9384aff53 contains v1.5.0-rc0 v1.5.0-rc1 So this only detects the capability bit using virQEMUCapsProbeQMPCommandLine.