From owner-svn-src-head@freebsd.org Thu Nov 29 18:10:39 2018 Return-Path: Delivered-To: svn-src-head@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 A181E11478BA for ; Thu, 29 Nov 2018 18:10:39 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-qt1-x82a.google.com (mail-qt1-x82a.google.com [IPv6:2607:f8b0:4864:20::82a]) (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 DDA857AC05 for ; Thu, 29 Nov 2018 18:10:38 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-qt1-x82a.google.com with SMTP id d19so3002247qtq.9 for ; Thu, 29 Nov 2018 10:10:38 -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=0YlnCdCTDaEMHrm9x/JE9wGD0jTg4EYlcIdfXTP3iXw=; b=I13Dga9xHycWjSOFvnzZEstmXynbURsQFwmOltLK3Fx5otS7qtfrMPg7NKqv2AiPcR wM4Q2JXPOb0F0j/BUxi4wY53kA8uiYj1U23cSTiTTBTHuFZoUn5jc890lsC22/xWWrxz E1yQz6H6DdjtwVAiUbsGLC8OAGan6ScqT8abytgJNBy2d9X9QDSPI0tFOkSGQLqRN7zX 944CNXWaSsONPMtJ+5QTidwIR1QTFHTbJBVRU5dwIUwKWFquJgpDJB2i0KOocUzcI0gu tpEe5xXTXJoirfoM/Q3MIxeXQRQ4r/7phQF995nWEDOsaSXQF+Y80p/INSrDOPu0wdpg cQTg== 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=0YlnCdCTDaEMHrm9x/JE9wGD0jTg4EYlcIdfXTP3iXw=; b=EY+MSzduUvJjGOOeIsK5fC42uKz6xVB9joLvzK0E1K7BzmD1rHBszIpxOU7N205TzQ U5DrWMZLY6gyLdl8q0UgnbD9JICw3RhFW6IFPFi24BgajINmVCFPuSRo2fBi2INrS+TS 93gFvl92wWgzyzrJMYucrYjwg95dFvmDpkb3eh140qiG7pfPy01jaT8unAiENxf1k1cA reCtgLv2OOZ9/EiVmkl2rW2Y1DMIyXddokFwDCYQliPBeAu71zkCckmJLe+S8Nax+Lng I4CL9KVdEzFMTEnzef5UGDGaHA32u5HhC7QEBIK1wzExscRKoTOMEp51dSCnTafiTcyH 61Bg== X-Gm-Message-State: AA+aEWZTrQY2qiX5wwB8agBAxVX1N0w4W5Ea42alV98cVtWlB25NFhq5 VmiILm4wYSWiRvAmdgTjrnNsDLHmpcdnkLBLJNRdfQ== X-Google-Smtp-Source: AFSGD/WjBpDN8m8NQb95xZDqIGzgCvGsLU2bwiOgepEU495a/M0hIjWVb6FxGMZjJFjbUPV3ZCbwrKnfCQOVtmpJphE= X-Received: by 2002:a0c:f143:: with SMTP id y3mr2476581qvl.21.1543515038160; Thu, 29 Nov 2018 10:10:38 -0800 (PST) MIME-Version: 1.0 References: <201811291421.wATELQbx059318@repo.freebsd.org> <9812F670-DD3D-4A56-A826-28B4A055F488@jnielsen.net> <505717d1-ffad-5241-2dae-deb2e9900335@freebsd.org> In-Reply-To: <505717d1-ffad-5241-2dae-deb2e9900335@freebsd.org> From: Warner Losh Date: Thu, 29 Nov 2018 11:10:26 -0700 Message-ID: Subject: Re: svn commit: r341232 - in head/usr.bin: . trim To: Eugene Grosbein Cc: lists@jnielsen.net, src-committers , svn-src-all@freebsd.org, svn-src-head@freebsd.org X-Rspamd-Queue-Id: DDA857AC05 X-Spamd-Result: default: False [-3.57 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.99)[-0.995,0]; R_DKIM_ALLOW(-0.20)[bsdimp-com.20150623.gappssmtp.com]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-1.00)[-0.999,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[svn-src-head@freebsd.org]; DMARC_NA(0.00)[bsdimp.com]; RCPT_COUNT_FIVE(0.00)[5]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[bsdimp-com.20150623.gappssmtp.com:+]; MX_GOOD(-0.01)[ALT1.aspmx.l.google.com,aspmx.l.google.com,ALT2.aspmx.l.google.com]; RCVD_IN_DNSWL_NONE(0.00)[a.2.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.94)[-0.940,0]; R_SPF_NA(0.00)[]; FORGED_SENDER(0.30)[imp@bsdimp.com,wlosh@bsdimp.com]; RCVD_TLS_LAST(0.00)[]; IP_SCORE(-0.63)[ipnet: 2607:f8b0::/32(-1.74), asn: 15169(-1.32), country: US(-0.09)]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[imp@bsdimp.com,wlosh@bsdimp.com]; 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: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Nov 2018 18:10:39 -0000 On Thu, Nov 29, 2018 at 11:08 AM Eugene Grosbein wrote: > 30.11.2018 0:52, Warner Losh wrote: > > > It could work on files within a filesystem, but not in its current > state. ftruncate, however, is a better match there. None of the filesystems > support the DIOCDELETE ioctl. > > However, both of UFS and ZFS issue BIO_DELETE while freeing their fs > blocks, do they? > Yes. They do. You can't just open a file that's backed by ufs/zfs and issue the DIOCGDELETE ioctl. ZFS devices, though, do honor it. Warner