Date: Tue, 13 Nov 2018 15:58:45 -0700 From: Warner Losh <imp@bsdimp.com> To: "Conrad E. Meyer" <cem@freebsd.org> Cc: Alan Somers <asomers@freebsd.org>, FreeBSD FS <freebsd-fs@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: Hole-punching, TRIM, etc Message-ID: <CANCZdfqs049govetUdocwD-dTvbg=Y=zy2gxtT20Lqhy=2Wduw@mail.gmail.com> In-Reply-To: <CAG6CVpVcr=e=Dmg3JKD0BVQ9wiEWUujThAwy=PXyoyoRr_R7Og@mail.gmail.com> References: <CAOtMX2jgb_Pf9-MqirM=xihVpyRmAGZKx2VRnvA_1Fx6kMYXXg@mail.gmail.com> <CAG6CVpVcr=e=Dmg3JKD0BVQ9wiEWUujThAwy=PXyoyoRr_R7Og@mail.gmail.com>
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On Tue, Nov 13, 2018 at 3:52 PM Conrad Meyer <cem@freebsd.org> wrote: > Geom devices have the DIOCGDELETE ioctl, which translates into > BIO_DELETE (which is TRIM, as I understand it). > Correct. TRIM is both the catch-all term people use, as well as the name of a specific DSM (data set management) command in the ATA command set. All FLASH technologies have it (thought what it means under the covers varies a bit). Thin provisioned resources like in VMs also have it. Warner
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