From owner-freebsd-hackers@freebsd.org Sun Dec 2 03:50:14 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8F73F130EB6F for ; Sun, 2 Dec 2018 03:50:14 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-qt1-x832.google.com (mail-qt1-x832.google.com [IPv6:2607:f8b0:4864:20::832]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E6BAA8187F for ; Sun, 2 Dec 2018 03:50:13 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-qt1-x832.google.com with SMTP id t13so10322741qtn.3 for ; Sat, 01 Dec 2018 19:50:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=00mJLhSCDjQ2kgWz8GL13fMb5wxirwpwlDlZr2jMZZY=; b=UHW8mFGEf29R8Y9o/kC8aoBgQyMXnCgzwxm4Jnxw8iDygJhz4qQVsbR1KCwmWeapQl DcVaePXldQEOcxv37yKjV2ZIjUR3QQoDrFdVgBeMIfLu5JUyntBdwA/i8h2EOCs6Khdu ISN53mMOuoU5IJQWX8rc1lMK6DGSu1UqnyrsbXWDPQGiiFPjhtFAbDRue1i6baHMxVzC WDnh60fCfytnB6KSSkLDi4AEXqj2EelA+z0akQfB5nSS2Qzs8wEuNzlaolWswcaMmUI8 fBndy1be30UXi3pyomuo0tWKJKrK+C48jXN74QvA+3A+kwdW8SGPoWwXISwiiQ4pdNJW ExLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=00mJLhSCDjQ2kgWz8GL13fMb5wxirwpwlDlZr2jMZZY=; b=Wq7TaohCz0JIhPY8XLhhyAQeUwazMjOXiDEJuuiXjNtlas1My7kxQtCFpsvJPSUzpw qpOYB7+lu1+2vDx5ks7q47hgXiiNctzj4BnJT575gHADUVjO7KsqAzNCRhVIlCLUEpA3 c692BDg2BHjP4JkcwdJkzTYYeyp2iv3nh3X303wcFEGXMej0XN+rWZFxSiK07jXXyP/T hEydbPw8pricT3EfwZHHa99bfLlgiKHCccExM2A/WhIpuUVYsqhTAuYWNl9XX+ORDCnb uge/+Z7XBoAJiFET3n0G1EWhsQ8CgBbsUIfSipvUncWJagOuSy3yYAZ6Om5jpGKDG1nd CqLA== X-Gm-Message-State: AA+aEWbVyHLRg+7Ea8fWhwMkSy061u3Rgdczr1k782Aoia+wMw47bO2y U9Nfyt1BP73tiCm1kbcrtKZmmzITuksznKF4IdVw5Q== X-Google-Smtp-Source: AFSGD/XQEv1R5WU0/9JtPyMoBndtyZedb/utKFsHRZ2mAQpZ8djMnFs265JxCVuYFxrWiyG9JH29eQQITe5r4yRrmYM= X-Received: by 2002:aed:3881:: with SMTP id k1mr10536582qte.345.1543722613452; Sat, 01 Dec 2018 19:50:13 -0800 (PST) MIME-Version: 1.0 References: <20181201.011411.2100982142219259108.ish@amail.plala.or.jp> <1543622218.1860.169.camel@freebsd.org> <5281174.XOh7uYVVfo@photon.int.bluestop.org> In-Reply-To: From: Warner Losh Date: Sat, 1 Dec 2018 20:50:02 -0700 Message-ID: Subject: Re: How to use trim command ? To: Rick Macklem Cc: Rebecca Cran , "ish@amail.plala.or.jp" , "freebsd-hackers@freebsd.org" , "freebsd-hackers@freebsd.org" , Eugene Grosbein , Ian Lepore X-Rspamd-Queue-Id: E6BAA8187F X-Spamd-Result: default: False [-3.99 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; R_DKIM_ALLOW(-0.20)[bsdimp-com.20150623.gappssmtp.com]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_HAM_SHORT(-0.98)[-0.978,0]; NEURAL_HAM_LONG(-1.00)[-0.998,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[bsdimp.com]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[bsdimp-com.20150623.gappssmtp.com:+]; MX_GOOD(-0.01)[cached: ALT1.aspmx.l.google.com]; RCPT_COUNT_SEVEN(0.00)[7]; RCVD_IN_DNSWL_NONE(0.00)[2.3.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; R_SPF_NA(0.00)[]; FORGED_SENDER(0.30)[imp@bsdimp.com,wlosh@bsdimp.com]; SUBJECT_ENDS_QUESTION(1.00)[]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[imp@bsdimp.com,wlosh@bsdimp.com]; IP_SCORE(-2.01)[ip: (-6.95), ipnet: 2607:f8b0::/32(-1.69), asn: 15169(-1.30), country: US(-0.09)]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Server: mx1.freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 02 Dec 2018 03:50:14 -0000 On Sat, Dec 1, 2018, 3:14 PM Rick Macklem Warner Losh wrote: > >Rebecca Cran wrote: > >> On Friday, 30 November 2018 17:36:01 MST Eugene Grosbein wrote: > >> > 01.12.2018 6:56, Ian Lepore wrote: > >> > >> > newfs destroys data too, cat > /dev/da0 does this too, > >> > add the name "dd" itself does not imply data destruction. > >> > >> > Can you invent better name? > >> > >> 'discard'? > >> > > > >That's a good name. trim has the unfortunate collision with the perl > 'trim' > >function and similar things that I didn't think of when I recommended it. > >It's also nicely technology agnostic. > > What about something with "ssd" in it, like "ssdbulkerase" or > "ssderaseall"? > No. Nothing with ssd in it will get past me. It's not technology specific. Warner >