linux-kernel - Re: [f2fs-dev] [PATCH v3] f2fs: add sysfs node to control ra

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Message-ID: <e7683629-d862-aab2-18a1-4bee84acee48@kernel.org>
Date:   Tue, 3 Aug 2021 16:31:22 +0800
From:   Chao Yu <chao@...nel.org>
To:     Daeho Jeong <daeho43@...il.com>, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>,
        Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH v3] f2fs: add sysfs node to control ra_pages
 for fadvise seq file

On 2021/8/3 12:22, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@...gle.com>
> 
> fadvise() allows the user to expand the readahead window to double with
> POSIX_FADV_SEQUENTIAL, now. But, in some use cases, it is not that
> sufficient and we need to meet the need in a restricted way. We can
> control the multiplier value of bdi device readahead between 2 (default)
> and 256 for POSIX_FADV_SEQUENTIAL advise option.
> 
> Signed-off-by: Daeho Jeong <daehojeong@...gle.com>

I guess you can add below tag directly in v3. :)

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,