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

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Message-ID: <4F604D81.1060607@openvz.org>
Date:	Wed, 14 Mar 2012 11:49:21 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	Christoph Hellwig <hch@...radead.org>
CC:	"linux-mm@...ck.org" <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" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] radix-tree: iterating general cleanup

Christoph Hellwig wrote:
> Any updates on this series?

I had sent "[PATCH v2 0/3] radix-tree: general iterator" February 10, there is no more updates after that.
I just checked v2 on top "next-20120314" -- looks like all ok.

>
> 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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> ---end quoted text---

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