Messages in this thread | | | Date | Mon, 3 Jul 2000 11:53:29 +0100 | From | "Stephen C. Tweedie" <> | Subject | Re: tty cleanup |
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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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