Hi,
On Fri, Jun 30, 2000 at 12:14:21AM +0200, Rogier Wolff wrote:
>
> Theodore Y. Ts'o wrote:
> > + if (PAGE_SIZE != N_TTY_BUF_SIZE) {
> > + p = kmalloc(N_TTY_BUF_SIZE, prio);
>
> Last I looked (about two or three years ago), kmallocing 4096 bytes on
> a 8192-byte-page machine would allocate you a full page.
The slab allocator is neat, though. It is capable of storing the
descriptor information for allocated blocks in a separate structure,
so that power-of-two allocations can now be handled _much_ more
efficiently. The slab allocator can deal with PAGE_SIZE allocations
without having to resort to higher-order get_free_page calls, for
example.
Given that kmalloc currently uses the slab allocator, kmalloc(4096)
shouldn't be a problem any more.
Cheers,
Stephen
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