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    SubjectRe: [RFC] [PATCH] Reducing average ext2 fsck time through fs-wide dirty bit]
    On Tue, Mar 21, 2006 at 05:10:36PM -0800, Valerie Henson wrote:
    > The combination of the orphan inode and preallocation blocks problem
    > led me to another idea: create in-memory-only allocation bitmaps for
    > both inodes and blocks. These bitmaps would track blocks and inodes
    > allocated only for the life of this mount (or a file open) in memory
    > rather than on disk. I haven't implemented this yet but I think it is
    > a promising approach.

    As I discovered about 5 seconds after starting to implement this, this
    is a terrible idea. Hint: think about worst-case memory usage. I am
    working on porting the ext3 reservation code to ext2 instead.

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