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Date: Wed, 17 Feb 2010 16:46:19 +0100 From: Gaëtan Podevijn <gpodevij@...il.com> To: linux-ext4@...r.kernel.org Subject: Ext2 and ext4 preallocation / mballoc Hello, Reading this http://web.mit.edu/tytso/www/linux/ext2intro.html I understand that ext2 preallocates 8 blocks when a writing data to a file. Ext3 uses the windows reservations method, but is that ext3 also preallocates 8 blocks when writing data ? Moreover, this page http://kernelnewbies.org/Ext4#head-b2148d2a96d22a1bd7e376e6c08e4a38d08fb157 explains that ext3 allocates one block at a time and ext4 uses multiblock allocation that is, allocates many block in a single system call. What is the difference between preallocation on ext2 (and ext3 ?) and mballoc ? TYA, Gaëtan PS : I'm sorry for my really bad english -- 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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