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

On 05/14/2013 02:44 PM, Osier Yang wrote: > 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. > ACK,