Re: [patchlet] Removing unneeded line in vmtruncate() (2.4.0-t8p1)

From: Alexander Viro (viro@math.psu.edu)
Date: Sat Sep 02 2000 - 11:45:06 EDT

  • Next message: Alexander Viro: "Re: thread rant"

    On Sat, 2 Sep 2000, Rasmus Andersen wrote:

    > > ... except that comment is there for purpose. Expanding ->truncate()
    > > should not set ->i_size until it's done with the metadata. You don't want
    > > mappings on the part currently being expanded. It doesn't matter for ext2
    > > and friends, but it's a problem for FAT and friends.
    > >
    >
    > This is probably just me being a bit dense, but I am having problems
    > understanding your comment. The code path affected by my patch (and
    > where the comment is placed) is not part of the do_expand code path
    > (the "Expanding ->truncate()" from your comment?). And in do_expand
    > we already set i_size=offset before calling truncate(). Which you
    > seem to object to?

            Which is a bug that cannot be fixed until ->truncate() gets new
    size as an explicit argument. And I doubt that having two similar methods
    with different ways to pass parameter (->i_size vs. argument) would be a
    good idea.

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