linux-kernel - Re: [PATCH RFC md-6.16 v3 00/19] md: introduce a new lockless bitmap

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Message-ID: <6aeecf3e-2f24-7d30-8462-c8d30b197740@huaweicloud.com>
Date: Mon, 12 May 2025 16:40:02 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Christoph Hellwig <hch@....de>, Yu Kuai <yukuai1@...weicloud.com>
Cc: xni@...hat.com, colyli@...nel.org, agk@...hat.com, snitzer@...nel.org,
 mpatocka@...hat.com, song@...nel.org, linux-kernel@...r.kernel.org,
 dm-devel@...ts.linux.dev, linux-raid@...r.kernel.org, yi.zhang@...wei.com,
 yangerkun@...wei.com, johnny.chenyi@...wei.com,
 "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC md-6.16 v3 00/19] md: introduce a new lockless bitmap

Hi,

在 2025/05/12 13:21, Christoph Hellwig 写道:
>>>From looking over the patches this entirely dropped support for bitmap
> files for now.  Do you plan to get back to those?

I don't have such plan for now, actually I tend to remove bitmap file,
once llbitmap is ready with lightweight overhead, I expect perforamce
can be better than old bitmap with bitmap file.

If there are cases that llbitmap performace is still much worse than
none bitmap, and bitmap file can reduce the gap, we'll probable think
about bitmap file again.

Thanks,
Kuai

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