At Fri, 11 Dec 2020 14:42:45 +0900, Michael Paquier <mich...@paquier.xyz> wrote 
in 
> On Fri, Dec 11, 2020 at 11:00:58AM +0900, Kyotaro Horiguchi wrote:
> > Although we could just rip some words off, I'd like to propose instead
> > to add an explanation why it is not exposed for anonymous allocations,
> > like the column allocated_size.
> 
> Indeed, there is a hiccup between what the code does and what the docs
> tell: the offset is not NULL for unused memory.
> 
> > -       The offset at which the allocation starts. NULL for anonymous
> > -       allocations and unused memory.
> > +       The offset at which the allocation starts. For anonymous 
> > allocations,
> > +       no information about individual allocations is available, so the 
> > column
> > +       will be NULL in that case.
> 
> I'd say: let's be simple and just remove "and unused memory" because
> anonymous allocations are...  Anonymous so you cannot know details
> related to them.  That's something easy to reason about, and the docs
> were written originally to remain simple.

Hmm. I don't object to that.  Howerver, isn't the description for
allocated_size too verbose in that sense?

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center


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