linux-kernel - Re: [PATCH 00/23] md/llbitmap: md/md-llbitmap: introduce a new lockless bitmap

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Message-ID: <44929c92-76fd-3a87-6d89-700b1d488277@huaweicloud.com>
Date: Fri, 30 May 2025 14:45:51 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Yu Kuai <yukuai1@...weicloud.com>, hch@....de, xni@...hat.com,
 colyli@...nel.org, song@...nel.org
Cc: linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-raid@...r.kernel.org, yi.zhang@...wei.com, yangerkun@...wei.com,
 johnny.chenyi@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH 00/23] md/llbitmap: md/md-llbitmap: introduce a new
 lockless bitmap

Hi,

在 2025/05/24 14:12, Yu Kuai 写道:
> Yu Kuai (23):
>    md: add a new parameter 'offset' to md_super_write()
>    md: factor out a helper raid_is_456()
>    md/md-bitmap: cleanup bitmap_ops->startwrite()
>    md/md-bitmap: support discard for bitmap ops
>    md/md-bitmap: remove parameter slot from bitmap_create()
>    md/md-bitmap: add a new sysfs api bitmap_type
>    md/md-bitmap: delay registration of bitmap_ops until creating bitmap
>    md/md-bitmap: add a new method skip_sync_blocks() in bitmap_operations
>    md/md-bitmap: add a new method blocks_synced() in bitmap_operations
>    md: add a new recovery_flag MD_RECOVERY_LAZY_RECOVER
>    md/md-bitmap: make method bitmap_ops->daemon_work optional
>    md/md-bitmap: add macros for lockless bitmap
>    md/md-bitmap: fix dm-raid max_write_behind setting
>    md/dm-raid: remove max_write_behind setting limit
>    md/md-llbitmap: implement llbitmap IO
>    md/md-llbitmap: implement bit state machine
>    md/md-llbitmap: implement APIs for page level dirty bits
>      synchronization
>    md/md-llbitmap: implement APIs to mange bitmap lifetime
>    md/md-llbitmap: implement APIs to dirty bits and clear bits
>    md/md-llbitmap: implement APIs for sync_thread
>    md/md-llbitmap: implement all bitmap operations
>    md/md-llbitmap: implement sysfs APIs
>    md/md-llbitmap: add Kconfig

Patch 3, 13, 14 are applied to md-6.16, they are not related to
new bitmap:

	md/md-bitmap: cleanup bitmap_ops->startwrite()
	md/md-bitmap: fix dm-raid max_write_behind setting
	md/dm-raid: remove max_write_behind setting limit

Thanks,
Kuai

> 
>   Documentation/admin-guide/md.rst |   80 +-
>   drivers/md/Kconfig               |   11 +
>   drivers/md/Makefile              |    2 +-
>   drivers/md/dm-raid.c             |    6 +-
>   drivers/md/md-bitmap.c           |   50 +-
>   drivers/md/md-bitmap.h           |   55 +-
>   drivers/md/md-llbitmap.c         | 1556 ++++++++++++++++++++++++++++++
>   drivers/md/md.c                  |  247 +++--
>   drivers/md/md.h                  |   20 +-
>   drivers/md/raid5.c               |    6 +
>   10 files changed, 1901 insertions(+), 132 deletions(-)
>   create mode 100644 drivers/md/md-llbitmap.c