linux-kernel - Re: [PATCH] mm: unify shmem and tiny-shmem

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Message-ID: <1710.1222986220@redhat.com>
Date:	Thu, 02 Oct 2008 23:23:40 +0100
From:	David Howells <dhowells@...hat.com>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	dhowells@...hat.com, Matt Mackall <mpm@...enic.com>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] mm: unify shmem and tiny-shmem

Hugh Dickins <hugh@...itas.com> wrote:

> That's much nicer than I'd been imagining, thanks Matt: I've no qualms
> about the few #ifdefs you're adding to mm/shmem.c, it does seem an
> outright improvement that you're bringing them together.

It's not an outright improvement.  shmem.o is still larger than tiny-shmem.o,
albeit not a lot; however, some embedded people really do count the bytes.

> This ifndef is the ugliest part of it: and looking into it, guess
> what, shmem_get_unmapped_area() hasn't been used since 2.6.20 -
> that's right, isn't it, David?

Ummm...  It seems to be.  I think it used to be used by SYSV SHM.  Certainly
deleting that function causes no link problems.

David
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