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([2001:984:3171:0:126:e139:19f1:9a46]) by smtp.gmail.com with ESMTPSA id q10sm19214873wrv.95.2020.04.15.04.14.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Apr 2020 04:14:56 -0700 (PDT) Subject: Re: btrfs freezing on writes To: Zygo Blaxell Cc: linux-btrfs@vger.kernel.org References: <6a1c8ce0-ce2a-698d-dcc6-0657a125dae4@gmail.com> <20200409043245.GO13306@hungrycats.org> <20200409230724.GM2693@hungrycats.org> <20200411202134.GN2693@hungrycats.org> From: kjansen387 Message-ID: <920dd953-74b5-2ab5-ed10-7e9d9c18ec26@gmail.com> Date: Wed, 15 Apr 2020 13:14:54 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200411202134.GN2693@hungrycats.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org OK thanks. I did try 2g on top of 172g, that didn't work, but after playing with 'limit' it did, all disks now have 3GB metadata. On 11-Apr-20 22:21, Zygo Blaxell wrote: > The purpose of resize -2g was to make a little less unallocated space > on one drive compared to all the others, starting with all the drives > having equal unallocated space. The purpose of resize -172g was to > make the extra unallocated space on sdd go away, so it would be equal to > the other 3 drives. You have to do _both_ of those before the balance. > Or just add the two numbers, i.e. resize -174g. > > If you really want to be sure, resize by -200g (far more than necessary), > then balance start -mlimit=4,devid=4. The balance is "I know there are > exactly 5 block groups now, and I want to leave exactly one behind," > and the resize is "I want no possibility of new block groups on sdd for > some time." >