Re: [PATCH 1/3] slab: introduce krealloc

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

On 2/21/07, Christoph Lameter <clameter@sgi.com> wrote:
> Why not? Its a realloc call and these are the classic semantics of
> realloc. Otherwise realloc will always move the memory.

Well, as a reference, the user-space equivalent is defined in SUSv3 as:

"The realloc() function shall change the size of the memory object
pointed to by ptr to the size specified by size."

I think it is reasonable to expect krealloc() to not waste too much
space if I, say, reallocate a 128 byte buffer to 32 bytes.

On 2/21/07, Christoph Lameter <clameter@sgi.com> wrote:
> Check that both sizes fall into the same general cache. Do the following
> at the beginning of the function

Not available in the slob allocator AFAIK but yeah, I'll add this
optimization to the slab version. Thanks Christoph.

                             Pekka