Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 1 Jun 2007, Andrew Morton wrote:

> > On Fri, 1 Jun 2007 18:37:46 -0700 (PDT) Christoph Lameter <[email protected]> wrote:
> >
> > +#define ZERO_SIZE_PTR ((void *)16)
> 
> Jeremy's point was a good one.  The kernel _does_ use address-comparison
> to determine object-inequality in an unknown but non-zero number of places.
> 
> It is of course unlikely that this will occur in conjunction with zero-sized
> objects, but who knows?

The zero sized objects are always the same and have the same content of 
nothingness. So the kernel would find that they are the same which they 
indeed are. Why could this be a problem?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux