linux-kernel - Re: [PATCH v1.1 1/2] erofs: add support for the full decompressed length

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Message-ID: <e3144a66-c5e6-6f2b-88a9-74730972abff@kernel.org>
Date:   Wed, 18 Aug 2021 22:11:32 +0800
From:   Chao Yu <chao@...nel.org>
To:     Gao Xiang <hsiangkao@...ux.alibaba.com>,
        linux-erofs@...ts.ozlabs.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Huang Jianan <huangjianan@...o.com>,
        Lasse Collin <lasse.collin@...aani.org>,
        nl6720 <nl6720@...il.com>
Subject: Re: [PATCH v1.1 1/2] erofs: add support for the full decompressed
 length

On 2021/8/14 23:27, Gao Xiang wrote:
> Previously, there is no need to get the full decompressed length since
> EROFS supports partial decompression. However for some other cases
> such as fiemap, the full decompressed length is necessary for iomap to
> make it work properly.
> 
> This patch adds a way to get the full decompressed length. Note that
> it takes more metadata overhead and it'd be avoided if possible in the
> performance sensitive scenario.
> 
> Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

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

Thanks,