linux-kernel - Re: [PATCH v2 0/8] Improve the validation for maple tree and some cleanup

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Message-ID: <CAMuHMdVtHXnm0EvPV7tVMeF7Z9JEhjyKMmg19aS3hdj2qRDhWw@mail.gmail.com>
Date:   Tue, 11 Jul 2023 12:10:32 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Peng Zhang <zhangpeng.00@...edance.com>
Cc:     Liam.Howlett@...cle.com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        maple-tree@...ts.infradead.org
Subject: Re: [PATCH v2 0/8] Improve the validation for maple tree and some cleanup

Hi Peng,

On Tue, Jul 11, 2023 at 5:56 AM Peng Zhang <zhangpeng.00@...edance.com> wrote:
> These patches do the following:
> 001 - 002: Small cleanup to maple tree.
> 003 - 006: Improve the validation for maple tree.
> 007 - 008: Drop some functions that will no longer be used.
>
> Thanks Liam for the review.
>
> Changes since v1:
>  - Add fixes tag and the necessary Cc. [1/8]
>  - Add the verification that gaps beyond the node limit are zero. [3/8]
>  - Revise comment. [5/8]
>  - Reformat the code. [6/8]
>
> Peng Zhang (8):
>   maple_tree: set the node limit when creating a new root node
>   maple_tree: don't use MAPLE_ARANGE64_META_MAX to indicate no gap
>   maple_tree: make mas_validate_gaps() to check metadata
>   maple_tree: fix mas_validate_child_slot() to check last missed slot
>   maple_tree: make mas_validate_limits() check root node and node limit
>   maple_tree: update mt_validate()
>   maple_tree: replace mas_logical_pivot() with mas_safe_pivot()
>   maple_tree: drop mas_first_entry()
>
>  include/linux/maple_tree.h |   2 -
>  lib/maple_tree.c           | 258 ++++++++++++-------------------------
>  2 files changed, 79 insertions(+), 181 deletions(-)

Thanks for your series!

I gave it a try with test_maple_tree on m68k/ARAnyM, and the net
impact is:

     TEST STARTING

     BUG at next_prev_test:2014 (1)
     Pass: 3749128 Run:3749129
    -BUG at check_empty_area_window:2655 (1)
    -Pass: 3754275 Run:3754277
    -BUG at check_empty_area_window:2656 (1)
    -Pass: 3754275 Run:3754278
    -BUG at check_empty_area_window:2657 (1)
    -Pass: 3754275 Run:3754279
    -BUG at check_empty_area_window:2661 (1)
    -Pass: 3754275 Run:3754280
    -BUG at check_empty_area_window:2662 (1)
    -Pass: 3754275 Run:3754281
    -maple_tree: 3804518 of 3804524 tests passed
    +maple_tree: 3804523 of 3804524 tests passed

So only one bug left to squash ;-)

Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds