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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 485CAC3A5A3 for ; Tue, 27 Aug 2019 12:40:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A82520828 for ; Tue, 27 Aug 2019 12:40:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729377AbfH0MkQ (ORCPT ); Tue, 27 Aug 2019 08:40:16 -0400 Received: from syrinx.knorrie.org ([82.94.188.77]:57256 "EHLO syrinx.knorrie.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726537AbfH0MkQ (ORCPT ); Tue, 27 Aug 2019 08:40:16 -0400 Received: from [IPv6:2001:980:4a41:fb::12] (unknown [IPv6:2001:980:4a41:fb::12]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by syrinx.knorrie.org (Postfix) with ESMTPSA id 60AC94F9772C1; Tue, 27 Aug 2019 14:40:13 +0200 (CEST) Subject: Re: Massive filesystem corruption since kernel 5.2 (ARCH) To: =?UTF-8?Q?Sw=c3=a2mi_Petaramesh?= , linux-btrfs@vger.kernel.org References: <11e4e889f903ddad682297c4420faeb0245414cf.camel@scientia.net> <18d24f2f-4d33-10aa-5052-c358d4f7c328@petaramesh.org> <5aefca34-224a-0a81-c930-4ccfcd144aef@petaramesh.org> <4bd70aa2-7ad0-d5c6-bc1f-22340afaac60@petaramesh.org> <370697f1-24c9-c8bd-01a7-c2885a7ece05@gmx.com> <209fcd36-6748-99c5-7b6d-319571bdd11f@petaramesh.org> <6525d5cf-9203-0332-cad5-2abc5d3e541c@gmx.com> <317a6f8f-3810-4a6c-ba64-3825317de1e7@petaramesh.org> From: Hans van Kranenburg Openpgp: preference=signencrypt Autocrypt: addr=hans@knorrie.org; keydata= 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11:14 AM, Swâmi Petaramesh wrote: > On 8/27/19 8:52 AM, Qu Wenruo wrote: >>> or to use the V2 space >>> cache generally speaking, on any machine that I use (I had understood it >>> was useful only on multi-TB filesystems...) >> 10GiB is enough to create large enough block groups to utilize free >> space cache. >> So you can't really escape from free space cache. > > I meant that I had understood that the V2 space cache was preferable to > V1 only for multi-TB filesystems. > > So would you advise to use V2 space cache also for filesystems < 1 TB ? Yes.