linux-kernel - Re: [RFC PATCH 0/2] apply write hints to select the type of segments

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Message-ID: <20171117183654.GA77642@jaegeuk-macbookpro.roam.corp.google.com>
Date:   Fri, 17 Nov 2017 10:36:54 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Hyunchul Lee <hyc.lee@...il.com>, Chao Yu <yuchao0@...wei.com>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        kernel-team@....com, Hyunchul Lee <cheol.lee@....com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org
Subject: Re: [RFC PATCH 0/2] apply write hints to select the type of segments

On 11/17, Christoph Hellwig wrote:
> 
> Next time please coordinate this with the block list and Jens, who
> actually wrote the patch.

Got it.

> 
> >   hints                     segment type
> >   -----                     ------------
> >   WRITE_LIFE_SHORT          CURSEG_COLD_DATA
> >   WRITE_LIFE_EXTREME        CURSEG_HOT_DATA
> >   others                    CURSEG_WARM_DATA
> 
> Normally cold data is data with a long lifetime, and extreme is colder
> than cold, so there seems to be some mismatch here.

It was wrong description and I fixed it which matches to implementation.

The below description was merged:

WRITE_LIFE_SHORT          CURSEG_HOT_DATA
WRITE_LIFE_EXTREME        CURSEG_COLD_DATA
others                    CURSEG_WARM_DATA