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[2001:468:c80:2103:f21f:afff:fe0c:8ada]) by smtp.gmail.com with ESMTPSA id 42-v6sm38879846qtt.31.2018.11.05.08.14.24 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 05 Nov 2018 08:14:24 -0800 (PST) From: valdis.kletnieks@vt.edu X-Google-Original-From: Valdis.Kletnieks@vt.edu X-Mailer: exmh version 2.8.0 04/21/2017 with nmh-1.7+dev To: "Austin S. Hemmelgarn" Cc: Adam Borowski , Pintu Agarwal , linux-mm@kvack.org, open list , kernelnewbies@kernelnewbies.org Subject: Re: Creating compressed backing_store as swapfile In-Reply-To: <79d0c96a-a0a2-63ec-db91-42fd349d50c1@gmail.com> References: <20181105155815.i654i5ctmfpqhggj@angband.pl> <79d0c96a-a0a2-63ec-db91-42fd349d50c1@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1541434463_4003P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Mon, 05 Nov 2018 11:14:23 -0500 Message-ID: <42594.1541434463@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1541434463_4003P Content-Type: text/plain; charset=us-ascii 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...) --==_Exmh_1541434463_4003P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.8.0 04/21/2017 iQEVAwUBW+BsX40DS38y7CIcAQKKYwf+JIV/RuxK/7zIKKuu0D7pKRGkvTgaqGWD zEMpdlcFYT3HXlXwL84EElJ4hiE3b1CZKfaDHqyYjLG+Q7WbY93n8Hmu9IFPH3F5 riIz1q62Ik8jfpjKFEoRGibbPutIgCL5y7WAXtdDnGy+1LB3ifHl3qu/Z3AlJzp1 zE8S5Du91C4qF+N0sPN9TyyKPu7+xGgGL3yYYpyRS58wMO6fxOLGwd82tNiv90mc 4wka1FtNq88S+l9WhREscHIctAt57pHStkDcChiFGmpf8Fb6WzATMUWO3JCo4mKr Fd+zC9LB3/8hsaBxTYP88+MBp8qtj+2deUCW0U97pLs/Mz/rLaWK5w== =yLe4 -----END PGP SIGNATURE----- --==_Exmh_1541434463_4003P--