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Date: Fri, 17 Jul 2009 20:38:18 -0700 From: Xiang Wang <xiangw@...gle.com> To: ext4 development <linux-ext4@...r.kernel.org> Subject: The flex_bg inode allocator Hi, Recently I've found out that the flex_bg inode allocator(the find_group_flex function called by ext4_new_inode) is actually not in use unless we specify the "oldalloc" option on mount as well as setting the flex_bg size to be > 1. Currently, the default option on mount is "orlov". We would like to know: 1) What's the current status of the flex_bg inode allocator? Will it be set as a default soon? 2) If not, are there any particular reasons that it is held back? Is it all because of the worse performance numbers shown in the two metrics ("read tree total" and "read compiled tree total") in Compilebench? 3) Are there any ongoing efforts and/or future plans to improve it? Or is there any work in similar directions? Thanks, Xiang -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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