From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58263) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cOURM-0003hC-6Y for qemu-devel@nongnu.org; Tue, 03 Jan 2017 14:08:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cOURL-0002yG-BG for qemu-devel@nongnu.org; Tue, 03 Jan 2017 14:08:08 -0500 References: <20170103170459.27662-1-berrange@redhat.com> <20170103170459.27662-4-berrange@redhat.com> From: Eric Blake Message-ID: Date: Tue, 3 Jan 2017 13:08:00 -0600 MIME-Version: 1.0 In-Reply-To: <20170103170459.27662-4-berrange@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="qBaDxGBEUSF0flVJ4IDUhsOH17PDkAE3r" Subject: Re: [Qemu-devel] [PATCH v2 3/5] iotests: reduce PBKDF iterations when testing LUKS List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Daniel P. Berrange" , qemu-devel@nongnu.org Cc: Kevin Wolf , qemu-block@nongnu.org, Max Reitz This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --qBaDxGBEUSF0flVJ4IDUhsOH17PDkAE3r From: Eric Blake To: "Daniel P. Berrange" , qemu-devel@nongnu.org Cc: Kevin Wolf , qemu-block@nongnu.org, Max Reitz Message-ID: Subject: Re: [Qemu-devel] [PATCH v2 3/5] iotests: reduce PBKDF iterations when testing LUKS References: <20170103170459.27662-1-berrange@redhat.com> <20170103170459.27662-4-berrange@redhat.com> In-Reply-To: <20170103170459.27662-4-berrange@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 01/03/2017 11:04 AM, Daniel P. Berrange wrote: > By default the PBKDF algorithm used with LUKS is tuned > based on the number of iterations to produce 1 second > of running time. This makes running the I/O test with > the LUKS format orders of magnitude slower than with > qcow2/raw formats. >=20 > When creating LUKS images, set the iteration time to > a 10ms to reduce the time overhead for LUKS, since > security does not matter in I/O tests. >=20 > Previsouly a full 'check -luks' would take s/Previsouly/Previously/ --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --qBaDxGBEUSF0flVJ4IDUhsOH17PDkAE3r Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJYa/aQAAoJEKeha0olJ0Nq0DIH/0h2nD4II7gyhqxi4bEfws/n C/nCaTudG6+Lv73KvjJir70VDcdlrijHuSWqE2QmXtWykXSjwbcYFWLbx9+lKUE0 EGDI4nnW2Y/0ZITqDuzKUVCMx/qfKf0E14Ae2d63QFxctjvNJ814+XpqELpJQt71 mT/Oep1C5PxQo/cj7zm4DvQnfW9wU8yQyqc8B5wHiTZWsyjku4/7kOv6lHEMIz87 g+DHtY59pz31b743U2ipmTxut/D4Jicnt4HNjz9Th3zP6oyE4BMNTsLRJOGtoN8+ b2F+OFZ6kQxOkNUEkh/qT1593QfSPeP4GoARumowlZrleJUaVaozZSMjrfn0r5E= =fWar -----END PGP SIGNATURE----- --qBaDxGBEUSF0flVJ4IDUhsOH17PDkAE3r--