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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3B85C19F2D for ; Sun, 7 Aug 2022 01:20:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233404AbiHGBUB (ORCPT ); Sat, 6 Aug 2022 21:20:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230407AbiHGBUA (ORCPT ); Sat, 6 Aug 2022 21:20:00 -0400 Received: from out20-158.mail.aliyun.com (out20-158.mail.aliyun.com [115.124.20.158]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 523C6BF6A for ; Sat, 6 Aug 2022 18:19:58 -0700 (PDT) X-Alimail-AntiSpam: AC=CONTINUE;BC=0.1570292|-1;BR=01201311R161S64rulernew998_84748_2000303;CH=blue;DM=|CONTINUE|false|;DS=CONTINUE|ham_social|0.110111-0.00392793-0.885961;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047188;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=1;RT=1;SR=0;TI=SMTPD_---.Onl6Dhs_1659835194; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.Onl6Dhs_1659835194) by smtp.aliyun-inc.com; Sun, 07 Aug 2022 09:19:55 +0800 Date: Sun, 07 Aug 2022 09:19:58 +0800 From: Wang Yugui To: linux-btrfs@vger.kernel.org Subject: the 1st data chunk(8M) allocated by mkfs.btrfs can not be allocated again after full balance? Message-Id: <20220807091957.17D7.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.75.04 [en] Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hi, The 1st data chunk allocated by mkfs.btrfs is 8M. After full balance, this 8M chunk is freed, and new allocated chunk size is changed to 1G. Then this 8M space can't be allocated again? Or we should allocate 1G for 1st data chunk in mkfs.btrfs? Best Regards Wang Yugui (wangyugui@e16-tech.com) 2022/08/07