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,URIBL_BLOCKED,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 02E48C3A5A3 for ; Tue, 27 Aug 2019 09:14:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D662220828 for ; Tue, 27 Aug 2019 09:14:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729360AbfH0JOj (ORCPT ); Tue, 27 Aug 2019 05:14:39 -0400 Received: from relay9-d.mail.gandi.net ([217.70.183.199]:51439 "EHLO relay9-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728676AbfH0JOj (ORCPT ); Tue, 27 Aug 2019 05:14:39 -0400 X-Originating-IP: 37.164.105.202 Received: from [10.137.0.38] (unknown [37.164.105.202]) (Authenticated sender: swami@petaramesh.org) by relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 9697DFF810 for ; Tue, 27 Aug 2019 09:14:36 +0000 (UTC) Subject: Re: Massive filesystem corruption since kernel 5.2 (ARCH) To: 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> From: =?UTF-8?Q?Sw=c3=a2mi_Petaramesh?= Openpgp: preference=signencrypt Autocrypt: addr=swami@petaramesh.org; keydata= xsDiBEP8C/QRBADPiYmcQstlx+HdyR2FGH+bDgRZ0ZJBAx6F0OPW+CmIa6tlwdhSFtCTJGcw eqCgSKqzLS+WBd6qknpGP3D2GOmASt+Juqnl+qmX8F/XrkxSNOVGGD0vkKGX4H5uDwufWkuV 7kD/0VFJg2areJXx5tIK4+IR0E0O4Yv6DmBPwPgNUwCg0OdUy9lbCxMmshwJDGUX2Y/hiDsD /3YTjHYH2OMTg/5xXlkQgR4aWn8SaVTG1vJPcm2j2BMq1LUNklgsKw7qJToRjFndHCYjSeqF /Yk2Cbeez9qIk3lX2M59CTwbHPZAk7fCEVg1Wf7RvR2i4zEDBWKd3nChALaXLE3mTWOE1pf8 mUNPLALisxKDUkgyrwM4rZ28kKxyA/960xC5VVMkHWYYiisQQy2OQk+ElxSfPz5AWB5ijdJy SJXOT/xvgswhurPRcJc+l8Ld1GWKyey0o+EBlbkAcaZJ8RCGX77IJGG3NKDBoBN7fGXv3xQZ mFLbDyZWjQHl33wSUcskw2IP0D/vjRk/J7rHajIk+OxgbuTkeXF1qwX2yc0oU3fDom1pIFBl dGFyYW1lc2ggPHN3YW1pQHBldGFyYW1lc2gub3JnPsJ+BBMRAgA+AhsDAh4BAheABQsJCAcC BhUKCQgLAgQWAgMBFiEEzB/joG05+rK5HJguL8JcHZB24y4FAl0Cdr0FCSJsbEkACgkQL8Jc HZB24y7PrwCeIj82AsMnwgOebV274cWEyR/yaDsAn25VN/Hw+yzkeXWAn5uIWJ+ZsoZkzsNN BEP8DFwQEAC77CwwyVuzngvfFTx2UzFwFOZ25osxSYE1Hpw249kbeK09EYbvMYzcWR34vbS0 DhxqwJYH9uSuMZf/Jp4Qa/oYN4x4ZMeOGc5+BdigcetQQnZkIpMaCdFm6HK/A4aqCjqbPpvF 3Mtd4CXcl1v94pIWq/n9JrLNclUA7rWnVKkPDqJ8WaxzDWm2YH9l1H+K+JbU/ow+Rk+y5xqp jL3XpOsVqf34RQhFUyCoysvvxH8RdHAeKfWTf5x6P8jOvxB6XwOnKkX91kC2N7PzoDxY7llY Uvy+ehrVVpaKLJ1a1R2eaVIHTFGO//2ARn6g4vVPMB93FLNR0BOGzEXCnnJKO5suw9Njv/aL bdnVdDPt9nc1yn3o8Bx/nZq1asX3zo/PnMz4Up24l6GrakJFMBZybX/KxA0CXDK6Rq4HSphI y/+v0I27FiQm7oT4ykiKnfFuh16NWM8rPV0UQgBLxSBoz327bUpsRuSrYh/oYBbE6p5KYHlB Acpix7wQ61OdUihBX73/AAx0Gd53fc0d4AYeKy4JXMl2uP2aiIvBeBaOKY5tzIq9gnL5K6rr xt4PSeONoLdVo8m8OyYeao1zvpgeNZ6FJ+VCYGBtsZEYIi80Ez5V0PpgAh7kSY1xbimDqKQx A/Jq2Q7sXBCdUeHN5cDgOZLKoJRvat/rhNaCSgUNfhUc2wADBRAAskb9Eolxs20NCfs424b3 /NRI7SVn9W2hXvI61UYfs19lfScnn9YfmiN7IdB2cLCE6OiAbSsK3Aw8HDnEc0AdylVNOiIK su7C4+CW6HKMyIUm1q2qv8RwW3K8eE8+S4+4/5k+38T39BlC3HcLSxS9vfgqmF6mF6VeD5Mn DDbrm7G06UFm1Eh5PKFSzYKZ4i9rD9R4ivDCxRBT9Cibw36iigdp14z87/Qq/NoFe8j9zrbs 3/3XZ22NxS0G8aNi0ejgDeYVRUUudBXK7zjV/pJDS4luB9iOiblysJmdKI3EegHlAcapTASn qsJ42O/Uv9jdSPPruZrMbeRKILqOl/YtI0orHGW/UzMYf/vbYWZ82azkPQqKDZF3Tb3h6ZHt csifD/J9IN7xh71aPf8ayIAus1AtPFtPUTjIJXqXIvAlNcDpaEpxn8xxcbVdcRBU/odASwsX IPdz8/HV5esod/QhR6/16kkKyOJNF5M/qC3PLur8Zu4iRu8EPiPr6vTAjhLrfXbQycuVc4CV c+hGlyYSW0xFaT+XF/4d+KZirsu07P5w/OCu+oRhH4StCOz58KrtuaX1dK5nLk6XkM4nKZhC 7kmpnPqS6BkdJngkozuKQZMJahIvFglag90xgLrOl5MtO55yr/0j4S4a8GxTkVs70GttcMKN TYaSBqmVw+0A3ILCZgQYEQIAJgIbDBYhBMwf46BtOfqyuRyYLi/CXB2QduMuBQJdAnbyBQki bGwWAAoJEC/CXB2QduMur1wAn1X3FcsmMdhMfiYwXw7LVw4FAIeWAJ9kLGer22WFWR2z2iU7 BtUAN08OPA== Message-ID: <317a6f8f-3810-4a6c-ba64-3825317de1e7@petaramesh.org> Date: Tue, 27 Aug 2019 11:14:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <6525d5cf-9203-0332-cad5-2abc5d3e541c@gmx.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: fr-FR Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org 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 ? TIA. Kind regards. ॐ -- Swâmi Petaramesh PGP 9076E32E