linux-kernel - Re: [PATCH v2] bcache: add the deferred_flush IO processing path in the writeback mode

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Message-Id: <C16766D1-0FDE-40C7-822B-96927F6A683A@coly.li>
Date: Mon, 26 May 2025 15:31:01 +0800
From: Coly Li <i@...y.li>
To: Zhou Jifeng <zhoujifeng@...inos.com.cn>
Cc: Coly Li <colyli@...nel.org>,
 邓旺波 <dengwangbo@...inos.com.cn>,
 "kent.overstreet" <kent.overstreet@...ux.dev>,
 linux-bcache <linux-bcache@...r.kernel.org>,
 linux-kernel <linux-kernel@...r.kernel.org>,
 夏华 <xiahua@...inos.com.cn>
Subject: Re: [PATCH v2] bcache: add the deferred_flush IO processing path in
 the writeback mode

Hi Jifeng,

> 2025年5月26日 14:41，Zhou Jifeng <zhoujifeng@...inos.com.cn> 写道：
> 
> On Mon, 28 Apr 2025 at 15:36, Zhou Jifeng <zhoujifeng@...inos.com.cn> wrote:
> .....
>> v1->v2: Version v2 mainly addresses the issue of low efficiency in
>> writing back dirty data in version v1. When writing back dirty data,
>> it no longer uses the FUA method but instead writes back no more than
>> 500 dirty bkeys and then uniformly sends a PREFLUSH instruction once.
>> I will supplement more test data later.
> .....
> 
> Comparison test data::
> https://github.com/jifengzhou/file/blob/main/bcache-deferred-patch-correlation-data.pdf
> 

Can I access the raw data to have a look? 

And the three different testings, which parameters of bcache are modified from default?

Thank.


Coly Li