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    SubjectRe: Making diff(1) of linux kernels faster
    Thursday, October 18, 2001, 11:55:41 AM,
    Wojtek Pilorz <> wrote:

    >> > > Be very careful not to modify a multi-linked file, or
    >> > > it will be damaged in all trees and won't be seen by

    WP> To be sure it is not possible to modify original tree files, I do
    WP> chown -R root.root original_tree

    WP> before copying it (via cp -lR) to new one, which will be modified with
    WP> whatever tools by me, logged in as a regular user. For those having root
    WP> access to a box this might be a useful way of preventing accidents ...
    WP> (this of course also assumes sane file permissions)
    WP> [...]

    Everytime I see this 'hardlinked kernel tree' technique explained,
    I think about true COW fs where duplicate files are physically the
    same single file but users don't care about that - COW magic...
    No hardlink/vi/emacs/... tricks will be needed...
    Best regards, vda

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