From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: discard_zeroes_data questions Date: Mon, 09 Nov 2015 19:16:28 -0500 Message-ID: References: <56412776.6080604@sandeen.net> <20151109233845.GA31524@birch.djwong.org> Mime-Version: 1.0 Content-Type: text/plain Cc: Eric Sandeen , "linux-ext4\@vger.kernel.org" To: "Darrick J. Wong" Return-path: Received: from mellowmood.mkp.net ([104.200.29.94]:53350 "EHLO mellowmood.mkp.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752303AbbKJAWr (ORCPT ); Mon, 9 Nov 2015 19:22:47 -0500 In-Reply-To: <20151109233845.GA31524@birch.djwong.org> (Darrick J. Wong's message of "Mon, 9 Nov 2015 15:38:45 -0800") Sender: linux-ext4-owner@vger.kernel.org List-ID: >>>>> "Darrick" == Darrick J Wong writes: Darrick> Last winter I sent in a patch to invalidate the page cache Darrick> after a discard: Darrick> https://marc.info/?l=linux-kernel&m=142249686225748&w=2 Darrick> ...because e2fsck gets confused it discards part of a d_z_d=1 Darrick> device and gets non-zeroed buffers back (from the page cache!) Darrick> immediately after. Darrick> But it never went in. Should I resend it? Yes, please! I thought this had gone in... -- Martin K. Petersen Oracle Linux Engineering