linux-kernel - Re: Creating compressed backing

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Message-ID: <42594.1541434463@turing-police.cc.vt.edu>
Date:   Mon, 05 Nov 2018 11:14:23 -0500
From:   valdis.kletnieks@...edu
To:     "Austin S. Hemmelgarn" <ahferroin7@...il.com>
Cc:     Adam Borowski <kilobyte@...band.pl>,
        Pintu Agarwal <pintu.ping@...il.com>, linux-mm@...ck.org,
        open list <linux-kernel@...r.kernel.org>,
        kernelnewbies@...nelnewbies.org
Subject: Re: Creating compressed backing_store as swapfile

On Mon, 05 Nov 2018 11:07:12 -0500, "Austin S. Hemmelgarn" said:

> Performance isn't _too_ bad for the BTRFS case though (I've actually
> tested this before), just make sure you disable direct I/O mode on the
> loop device, otherwise you run the risk of data corruption.

Did you test that for random-access. or just sequential read/write?
(Also, see the note in my other mail regarding doing a random-access
write to the middle of the file...)


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