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Date: Thu, 15 Mar 2012 10:36:24 +0800 From: Robin Dong <hao.bigrat@...il.com> To: Yongqiang Yang <xiaoqiangnk@...il.com> Cc: Ext4 Developers List <linux-ext4@...r.kernel.org> Subject: Re: [RFC] enable ext4 allocate blocks across group boundary 在 2012年3月15日 上午8:52，Yongqiang Yang <xiaoqiangnk@...il.com> 写道： > Hello List, > > Here is a proposal to enable ext4 allocate blocks across group boundary. > > Now ext4 allocates blocks within a single block group by locking a > group. Flex_bg puts metadata blocks together, as a result,it > enlarges contiguous blocks. So we can enable ext4 allocate blocks > within a flex block group. Inode allocation takes group lock as block > allocation, I am not sure if we should allocate inode within single > group as before. > > If we do this, then the new group boundary will be flex block group > boundary. I am not sure if it is worth doing. IMO, since the max size of one ext4-extent is just 128MB, maybe a contiguous space beyond a single block group can not be used efficiently. > > > Any ideas? > > -- > Best Wishes > Yongqiang Yang > -- > 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 -- -- Best Regard Robin Dong -- 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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