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From: Alan Somers <asomers@freebsd.org>
Date: Thu, 16 Jul 2020 10:45:28 -0600
Message-ID: <CAOtMX2g1Eu5ZH-3S5MbF_OLyohSNYXquW00D7f83Pu+psna2uQ@mail.gmail.com>
Subject: Re: svn commit: r363255 - head/sys/dev/virtio/block
To: Allan Jude <allanjude@freebsd.org>
Cc: src-committers <src-committers@freebsd.org>,
 svn-src-all <svn-src-all@freebsd.org>, 
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On Thu, Jul 16, 2020 at 10:32 AM Allan Jude <allanjude@freebsd.org> wrote:

> Author: allanjude
> Date: Thu Jul 16 16:32:16 2020
> New Revision: 363255
> URL: https://svnweb.freebsd.org/changeset/base/363255
>
> Log:
>   Add VIRTIO_BLK_T_DISCARD support to the virtio-blk driver
>
>   If the hypervisor advertises support for the DISCARD command then the
>   guest can perform TRIM commands, freeing space on the backing store.
>
>   If VIRTIO_BLK_F_DISCARD is enabled, advertise DISKFLAG_CANDELETE
>
>   Tested with FreeBSD guests on bhyve and KVM
>

+1