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List:       linux-api
Subject:    Re: [PATCH v7 00/10] fs: interface for directly reading/writing compressed data
From:       Josef Bacik <josef () toxicpanda ! com>
Date:       2021-01-29 16:32:06
Message-ID: 7ce164cd-e849-80d8-3d9e-8a9987dc3ad9 () toxicpanda ! com
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On 1/22/21 3:46 PM, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@fb.com>
> 
> This series adds an API for reading compressed data on a filesystem
> without decompressing it as well as support for writing compressed data
> directly to the filesystem. As with the previous submissions, I've
> included a man page patch describing the API. I have test cases
> (including fsstress support) and example programs which I'll send up
> [1].
> 
> The main use-case is Btrfs send/receive: currently, when sending data
> from one compressed filesystem to another, the sending side decompresses
> the data and the receiving side recompresses it before writing it out.
> This is wasteful and can be avoided if we can just send and write
> compressed extents. The patches implementing the send/receive support
> will be sent shortly.
> 
> Patches 1-3 add the VFS support and UAPI. Patch 4 is a fix that this
> series depends on; it can be merged independently. Patches 5-8 are Btrfs
> prep patches. Patch 9 adds Btrfs encoded read support and patch 10 adds
> Btrfs encoded write support.
> 
> These patches are based on Dave Sterba's Btrfs misc-next branch [2],
> which is in turn currently based on v5.11-rc4.
> 

Is everybody OK with this?  Al?  I would like to go ahead and get this merged 
for the next merge window as long as everybody is OK with it, as it's blocking a 
fair bit of BTRFS work.  Thanks,

Josef
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