Re: 2.6.16-rc5-mm2 - kzalloc() considered harmful for debugging.

[Pekka Enberg <penberg@cs.helsinki.fi>]

Hi Valdis,

On 12/18/05, Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:
> Blargh.  It's tempting to do something like this in include/linux/slab.h:
>
> #ifdef CONFIG_SLAB_DEBUG
> static inline void* kzalloc(size_t size, gfp_t flags)
> {
>         void *ret = kmalloc(size, flags);
>         if (ret)
>                 memset(ret, 0, size);
>         return ret;
> }
> #else
> extern void *kzalloc(size_t, gfp_t);
> #end

I don't see CONFIG_SLAB_DEBUG in 2.6.15-rc5-mm2. Is it an external patch?

> or maybe some ad-crock macro implementation, just so the actual calling site of
> kmalloc is recorded, rather than losing the caller of kzalloc.

I would prefer this. Both kzalloc and kstrdup should override the call
site of kmalloc. Preferably, all of them should use something like
__kmalloc_tracked() and pass the call site as an parameter.

                          Pekka
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