From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 519A9C388F7 for ; Sat, 7 Nov 2020 20:01:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0207420885 for ; Sat, 7 Nov 2020 20:01:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725911AbgKGUBF (ORCPT ); Sat, 7 Nov 2020 15:01:05 -0500 Received: from mr013msb.fastweb.it ([85.18.95.104]:44770 "EHLO mr013msb.fastweb.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725846AbgKGUBF (ORCPT ); Sat, 7 Nov 2020 15:01:05 -0500 X-Greylist: delayed 312 seconds by postgrey-1.27 at vger.kernel.org; Sat, 07 Nov 2020 15:01:04 EST Received-SPF: pass (mr013msb.fastweb.it: domain assyoma.it designates 93.63.55.57 as permitted sender) identity=mailfrom; receiver=mr013msb.fastweb.it; client-ip=93.63.55.57; envelope-from=g.danti@assyoma.it; helo=plutone.assyoma.it; X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgedujedrudduuddgudeffecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfhtefuvfghgfeupdcuqfgfvfenuceurghilhhouhhtmecufedttdenucenucfjughrpeggfffhvffufgfkgigtgfesthejjhdttdervdenucfhrhhomhepifhiohhnrghtrghnucffrghnthhiuceoghdruggrnhhtihesrghsshihohhmrgdrihhtqeenucggtffrrghtthgvrhhnpeeludehfeejtdevgffhfeehfeeufeegkeetfeejveevffevvddvheevjeegtdevveenucffohhmrghinheprghsshihohhmrgdrihhtnecukfhppeelfedrieefrdehhedrheejnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehhvghlohepphhluhhtohhnvgdrrghsshihohhmrgdrihhtpdhinhgvthepleefrdeifedrheehrdehjedpmhgrihhlfhhrohhmpeeoghdruggrnhhtihesrghsshihohhmrgdrihhtqedprhgtphhtthhopeeolhhinhhugidqgihfshesvhhgvghrrdhkvghrnhgvlhdrohhrghequcfqtfevrffvpehrfhgtkedvvdenlhhinhhugidqgihfshesvhhgvghrrdhkvghrnhgvlhdrohhrgh X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean Received: from plutone.assyoma.it (93.63.55.57) by mr013msb.fastweb.it (5.8.208) id 5F4CF1900635F024 for linux-xfs@vger.kernel.org; Sat, 7 Nov 2020 20:55:50 +0100 Received: from webmail.assyoma.it (localhost [IPv6:::1]) by plutone.assyoma.it (Postfix) with ESMTPA id 39BFCD4FAC0 for ; Sat, 7 Nov 2020 20:55:50 +0100 (CET) MIME-Version: 1.0 Date: Sat, 07 Nov 2020 20:55:50 +0100 From: Gionatan Danti To: linux-xfs@vger.kernel.org Subject: Recover preallocated space after a crash? User-Agent: Roundcube Webmail/1.4.9 Message-ID: <274ec62926defe526850a4253d2b96a8@assyoma.it> X-Sender: g.danti@assyoma.it Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Hi list, it is my understanding that XFS can preallocate some "extra" space via speculative EOF preallocation and speculative COW preallocation. During normal system operation, that extra space is recovered after some time. But what if system crashes? Can it be even recovered? If so, it is done at mount time or via a (more invasive) fsck? Thanks. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.danti@assyoma.it - info@assyoma.it GPG public key ID: FF5F32A8