[dm-devel] [PATCH v7 01/16] hashtable: introduce a small and naive hashtable
Tejun Heo
tj at kernel.org
Mon Oct 29 16:18:09 UTC 2012
Hello,
On Mon, Oct 29, 2012 at 12:14:12PM -0400, Mathieu Desnoyers wrote:
> Most of the calls to this initialization function apply it on zeroed
> memory (static/kzalloc'd...), which makes it useless. I'd actually be in
> favor of removing those redundant calls (as I pointed out in another
> email), and document that zeroed memory don't need to be explicitly
> initialized.
>
> Those sites that need to really reinitialize memory, or initialize it
> (if located on the stack or in non-zeroed dynamically allocated memory)
> could use a memset to 0, which will likely be faster than setting to
> NULL on many architectures.
I don't think it's a good idea to optimize out the basic encapsulation
there. We're talking about re-zeroing some static memory areas which
are pretty small. It's just not worth optimizing out at the cost of
proper initializtion. e.g. We might add debug fields to list_head
later.
Thanks.
--
tejun
More information about the dm-devel
mailing list