From owner-svn-src-all@freebsd.org Thu Nov 29 17:13:53 2018 Return-Path: Delivered-To: svn-src-all@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 5181511450DF; Thu, 29 Nov 2018 17:13:53 +0000 (UTC) (envelope-from eugen@freebsd.org) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:d12:604::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id ABBF676F81; Thu, 29 Nov 2018 17:13:52 +0000 (UTC) (envelope-from eugen@freebsd.org) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id wATHDjWY017817 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Nov 2018 18:13:46 +0100 (CET) (envelope-from eugen@freebsd.org) X-Envelope-From: eugen@freebsd.org X-Envelope-To: lists@jnielsen.net Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id wATHDid5089379 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Fri, 30 Nov 2018 00:13:45 +0700 (+07) (envelope-from eugen@freebsd.org) Subject: Re: svn commit: r341232 - in head/usr.bin: . trim To: John Nielsen References: <201811291421.wATELQbx059318@repo.freebsd.org> <9812F670-DD3D-4A56-A826-28B4A055F488@jnielsen.net> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org From: Eugene Grosbein Message-ID: <39f2c6b4-1d84-1324-217d-12dd5c2573b8@freebsd.org> Date: Fri, 30 Nov 2018 00:13:33 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <9812F670-DD3D-4A56-A826-28B4A055F488@jnielsen.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,SPF_SOFTFAIL autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.7 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: ABBF676F81 X-Spamd-Result: default: False [-0.45 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-0.42)[-0.416,0]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; NEURAL_SPAM_SHORT(0.28)[0.280,0]; NEURAL_HAM_LONG(-0.31)[-0.309,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Nov 2018 17:13:53 -0000 29.11.2018 23:45, John Nielsen wrote: > I’m curious, would this also be useful for virtual disks or SAN/NAS devices backed by thinly-provisioned storage? It won't work for for files residing on UFS/ZFS, if you mean that. And you can verify that easily: just make extra file and try to trim it to see "Inappropriate ioctl for device" error. It might work for iSCSI attached devices, I'm not sure.