linux-kernel - Re: [PATCH 0/4] radix-tree: iterating general cleanup

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Message-ID: <20120314073629.GA17016@infradead.org>
Date:	Wed, 14 Mar 2012 03:36:29 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] radix-tree: iterating general cleanup

Any updates on this series?

On Tue, Feb 07, 2012 at 11:54:56AM +0400, Konstantin Khlebnikov wrote:
> This patchset implements common radix-tree iteration routine and
> reworks page-cache lookup functions with using it.
> 
> radix_tree_gang_lookup_*slot() now mostly unused (the last user somethere in
> drivers/sh/intc/virq.c), but they are exported, we cannot remove them for now.
> 
> Also there some shmem-related radix-tree hacks can be reworked,
> radix_tree_locate_item() can be removed. I already have a few extra patches.
> 
> And as usual my lovely bloat-o-meter:
> 
> add/remove: 4/3 grow/shrink: 4/4 up/down: 1232/-964 (268)
> function                                     old     new   delta
> radix_tree_next_chunk                          -     499    +499
> static.shmem_find_get_pages_and_swap           -     404    +404
> find_get_pages_tag                           354     488    +134
> find_get_pages                               362     438     +76
> find_get_pages_contig                        345     407     +62
> __kstrtab_radix_tree_next_chunk                -      22     +22
> shmem_truncate_range                        1633    1652     +19
> __ksymtab_radix_tree_next_chunk                -      16     +16
> radix_tree_gang_lookup_tag_slot              208     180     -28
> radix_tree_gang_lookup_tag                   247     207     -40
> radix_tree_gang_lookup_slot                  204     162     -42
> radix_tree_gang_lookup                       231     160     -71
> __lookup                                     217       -    -217
> __lookup_tag                                 242       -    -242
> shmem_find_get_pages_and_swap                324       -    -324
> 
> ---
> 
> Konstantin Khlebnikov (4):
>       bitops: implement "optimized" __find_next_bit()
>       radix-tree: introduce bit-optimized iterator
>       radix-tree: rewrite gang lookup with using iterator
>       radix-tree: use iterators in find_get_pages* functions
> 
> 
>  include/asm-generic/bitops/find.h |   36 +++
>  include/linux/radix-tree.h        |  129 +++++++++++
>  lib/radix-tree.c                  |  422 +++++++++++++------------------------
>  mm/filemap.c                      |   75 ++++---
>  mm/shmem.c                        |   23 +-
>  5 files changed, 375 insertions(+), 310 deletions(-)
> 
> -- 
> Signature
> 
> --
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