From: Theodore Ts'o Subject: [PATCH 2/5] mke2fs: the -g option will now specify the clusters per block group Date: Mon, 14 Jan 2013 19:37:09 -0500 Message-ID: <1358210232-30578-2-git-send-email-tytso@mit.edu> References: <20130114211014.GA22642@thunk.org> <1358210232-30578-1-git-send-email-tytso@mit.edu> Cc: gnehzuil.liu@gmail.com, Theodore Ts'o To: Ext4 Developers List Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:43387 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756501Ab3AOAhT (ORCPT ); Mon, 14 Jan 2013 19:37:19 -0500 In-Reply-To: <1358210232-30578-1-git-send-email-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: If bigalloc is enabled, then -g will specify the clusters per block group. (If bigalloc is not enabled, then a cluster == a block, so the meaning of -g is not changed.) Signed-off-by: "Theodore Ts'o" --- misc/mke2fs.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/misc/mke2fs.c b/misc/mke2fs.c index 75d0e48..5cb49b3 100644 --- a/misc/mke2fs.c +++ b/misc/mke2fs.c @@ -1962,6 +1962,15 @@ profile_error: } } + /* + * If the bigalloc feature is enabled, then the -g option will + * specify the number of clusters per group. + */ + if (fs_param.s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_BIGALLOC) { + fs_param.s_clusters_per_group = fs_param.s_blocks_per_group; + fs_param.s_blocks_per_group = 0; + } + if (inode_size == 0) inode_size = get_int_from_profile(fs_types, "inode_size", 0); if (!flex_bg_size && (fs_param.s_feature_incompat & -- 1.7.12.rc0.22.gcdd159b