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Date:   Wed, 29 Nov 2017 22:20:42 +0800
From:   Wei Wang <wei.w.wang@...el.com>
To:     Matthew Wilcox <willy@...radead.org>
CC:     virtio-dev@...ts.oasis-open.org, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org, virtualization@...ts.linux-foundation.org,
        kvm@...r.kernel.org, linux-mm@...ck.org, mst@...hat.com,
        mhocko@...nel.org, akpm@...ux-foundation.org,
        mawilcox@...rosoft.com, david@...hat.com,
        penguin-kernel@...ove.SAKURA.ne.jp, cornelia.huck@...ibm.com,
        mgorman@...hsingularity.net, aarcange@...hat.com,
        amit.shah@...hat.com, pbonzini@...hat.com,
        liliang.opensource@...il.com, yang.zhang.wz@...il.com,
        quan.xu@...yun.com
Subject: Re: [PATCH v17 2/6] radix tree test suite: add tests for xbitmap

On 11/07/2017 01:00 AM, Matthew Wilcox wrote:
> On Fri, Nov 03, 2017 at 04:13:02PM +0800, Wei Wang wrote:
>> From: Matthew Wilcox <mawilcox@...rosoft.com>
>>
>> Add the following tests for xbitmap:
>> 1) single bit test: single bit set/clear/find;
>> 2) bit range test: set/clear a range of bits and find a 0 or 1 bit in
>> the range.
>>
>> Signed-off-by: Wei Wang <wei.w.wang@...el.com>
>> Cc: Matthew Wilcox <mawilcox@...rosoft.com>
>> Cc: Andrew Morton <akpm@...ux-foundation.org>
>> Cc: Michael S. Tsirkin <mst@...hat.com>
>> ---
>>   tools/include/linux/bitmap.h            |  34 ++++
>>   tools/include/linux/kernel.h            |   2 +
>>   tools/testing/radix-tree/Makefile       |   7 +-
>>   tools/testing/radix-tree/linux/kernel.h |   2 -
>>   tools/testing/radix-tree/main.c         |   5 +
>>   tools/testing/radix-tree/test.h         |   1 +
>>   tools/testing/radix-tree/xbitmap.c      | 278 ++++++++++++++++++++++++++++++++
> Umm.  No.  You've duplicated xbitmap.c into the test framework, so now it can
> slowly get out of sync with the one in lib/.  That's not OK.
>
> Put it back the way it was, with the patch I gave you as patch 1/n
> (relocating xbitmap.c from tools/testing/radix-tree to lib/).
> Then add your enhancements as patch 2/n.  All you should need to
> change in your 1/n from
> http://git.infradead.org/users/willy/linux-dax.git/commit/727e401bee5ad7d37e0077291d90cc17475c6392
> is a bit of Makefile tooling.  Leave the test suite embedded in the file;
> that way people might remember to update the test suite when adding
> new functionality.
>

Thanks for you suggestions. Please have a check the v18 patches:
The original implementation is put in patch 4, and the proposed changes 
are separated into patch 5 (we can merge them to patch 4 later if they 
look good to you), and the new APIs are in patch 6.

Best,
Wei

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