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    SubjectRe: [Bcache v14 16/16] bcache: Debug and tracing code
    On Tue, Jun 12, 2012 at 10:35:43AM -0700, Joe Perches wrote:
    > "(uint64_t *)k - i->d" is what type again?
    > What is a %zu?
    >
    > Isn't that a mismatch?

    You're right - ssize_t and size_t. I think gcc just isn't checking
    signedness at all, that %i should be a %u too. Good catch.

    >
    > > > > +static int debug_seq_show(struct seq_file *f, void *data)
    > > > > +{
    > > > > + static const char *tabs = "\t\t\t\t\t";
    > > >
    > > > Seems a _very_ odd use.
    > >
    > > It is a strange hack.
    > >
    > > The idea is that we want to indent more as we recurse; we could build up
    > > a new string of tabs each time we recurse that's got one more tab than
    > > our parent's, but that'd be a pain in the ass and it'd use more stack
    > > space (though that should be fine here), so instead it's just
    > > decrementing the pointer to the tab string to produce a string with one
    > > more tab.
    >
    > It's a nice idea, but that's not what's happening
    > as I believe you reference tabs only once as &tabs[4]

    bch_btree_dump() prints out tabs, and passes tabs - 1 when it recurses.


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