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    SubjectRe: [PATCH] expanding truncate


    On Thu, 3 Jan 2002, Oleg Drokin wrote:

    > Purpose of this patch is of course not to fill in the datablocks with zeroes.
    > The purpose (as applied to reiserfs) is to fill indirect data pointers (that is - pointers to real data blocks)
    > with zeroes (and to organize proper in-tree data structure for such pointers).
    > As of now such organization and zero-filling is done on a lazy manner at disk-flushing time.
    > Unfortunatelly this leads to races in the code.
    > I do not know why parts of this code can be needed by other filesystem and why Al Viro put it in generic VFS
    > code. (but he can comment on it, I think)

    I could, if I would remember doing that... ;-/

    Seriously, it looks like a half-arsed and very old attempt to do common
    expanding truncate() for no-holes filesystems. BTW, these days rlimit checks
    are done by vmtruncate().


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