From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx13.extmail.prod.ext.phx2.redhat.com [10.5.110.18]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r6JN1Lii018710 for ; Fri, 19 Jul 2013 19:01:21 -0400 Received: from mailgw01.dd24.net (mailgw01.dd24.net [193.46.215.41]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r6JN1JK8009503 for ; Fri, 19 Jul 2013 19:01:19 -0400 Received: from localhost (amavis01.dd24.net [192.168.1.111]) by mailgw01.dd24.net (Postfix) with ESMTP id 5A7F67CC15C for ; Fri, 19 Jul 2013 23:01:18 +0000 (GMT) Received: from mailgw01.dd24.net ([192.168.1.191]) by localhost (amavis01.dd24.net [192.168.1.105]) (amavisd-new, port 10191) with ESMTP id AyHkj5lktGca for ; Fri, 19 Jul 2013 23:01:13 +0000 (GMT) Received: from [192.168.0.101] (ppp-188-174-39-199.dynamic.mnet-online.de [188.174.39.199]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mailgw01.dd24.net (Postfix) with ESMTPSA id 46A7F7CC11C for ; Fri, 19 Jul 2013 23:01:13 +0000 (GMT) From: Christoph Anton Mitterer In-Reply-To: <51E99905.9000508@redhat.com> References: <1374172980.23440.10.camel@heisenberg.scientia.net> <51E916A8.1000101@redhat.com> <1374258168.5231.48.camel@fermat.scientia.net> <51E99905.9000508@redhat.com> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-IVsvBjvo4Rr0E+iAqq8Q" Date: Sat, 20 Jul 2013 01:01:12 +0200 Message-ID: <1374274872.5229.21.camel@fermat.scientia.net> Mime-Version: 1.0 Subject: Re: [linux-lvm] some questions Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: linux-lvm@redhat.com --=-IVsvBjvo4Rr0E+iAqq8Q Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi. On Fri, 2013-07-19 at 21:52 +0200, Zdenek Kabelac wrote: > > E.g. in cryptsetup you have a general option which controls whether TRI= M > > is passed through dm-crypt to lower block layers... I though --discards > > of being like that... >=20 > By default every normal (i.e. linear) LV should pass-through discards - t= here=20 > is AFAICS no code to block them and you can't disable them. >=20 > For thin volume - it's going through the pool first - and you have the ch= oice > either to ignore them completely, process them at pool level or pass-thro= ugh=20 > the pool to pool data device. Can you add that to the description of --discard in the manpage? I think right now one might easily think that it's a general control, on whether LVM passes these through or not. 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