linux-kernel - Re: [PATCH v3 0/4] Optimize the fast path of mas

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Message-ID: <1c0c3915-99d2-f75c-027a-70a1321b4662@bytedance.com>
Date:   Sun, 25 Jun 2023 12:04:34 +0800
From:   Peng Zhang <zhangpeng.00@...edance.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        maple-tree@...ts.infradead.org, Liam.Howlett@...cle.com
Subject: Re: [PATCH v3 0/4] Optimize the fast path of mas_store()



在 2023/6/15 16:42, Peng Zhang 写道:
> Add fast paths for mas_wr_append() and mas_wr_slot_store() respectively.
> The newly added fast path of mas_wr_append() is used in fork() and how
> much it benefits fork() depends on how many VMAs are duplicated.
> 
> Changes since v2:
>   - Add test for expanding range in RCU mode. [2/4]
> 
> v1: https://lore.kernel.org/lkml/20230602075353.5917-1-zhangpeng.00@bytedance.com/
> v2: https://lore.kernel.org/lkml/20230609120347.63936-1-zhangpeng.00@bytedance.com/
> 
> Peng Zhang (4):
>    maple_tree: add test for mas_wr_modify() fast path
>    maple_tree: add test for expanding range in RCU mode
>    maple_tree: optimize mas_wr_append(), also improve duplicating VMAs
>    maple_tree: add a fast path case in mas_wr_slot_store()
> 
>   lib/maple_tree.c                 | 69 +++++++++++++++++++----------
>   lib/test_maple_tree.c            | 65 +++++++++++++++++++++++++++
>   tools/testing/radix-tree/maple.c | 75 ++++++++++++++++++++++++++++++++
>   3 files changed, 186 insertions(+), 23 deletions(-)
> 
Hi Andrew,

I think this patchset can be queued for testing.
Both v2 and v3 just update the test code.