From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1d1pO0-0005qT-99 for mharc-grub-devel@gnu.org; Sat, 22 Apr 2017 03:23:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48577) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d1pNx-0005nf-Lu for grub-devel@gnu.org; Sat, 22 Apr 2017 03:23:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d1pNw-0004dK-Jz for grub-devel@gnu.org; Sat, 22 Apr 2017 03:23:13 -0400 Received: from mail.gw90.de ([2a01:4f8:100:7463::3]:36644) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1d1pNw-0004cT-Dt for grub-devel@gnu.org; Sat, 22 Apr 2017 03:23:12 -0400 Received: from [2a02:8109:8ac0:1c7f:5e33:e478:c88b:8ec4] (helo=mattotaupa) by mail.gw90.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1d1pNk-0002Ca-UY; Sat, 22 Apr 2017 07:23:01 +0000 Message-ID: <1492845773.2760.209.camel@users.sourceforge.net> Subject: Re: [coreboot] RFC: Changing CBMEM console to run as a persistent ring-buffer From: Paul Menzel To: Julius Werner Cc: coreboot@coreboot.org, seabios@seabios.org, grub-devel@gnu.org Date: Sat, 22 Apr 2017 09:22:53 +0200 In-Reply-To: References: Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-oaq+BMJLa8jqzlXwWErm" X-Mailer: Evolution 3.22.6-1 Mime-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a01:4f8:100:7463::3 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Apr 2017 07:23:15 -0000 --=-oaq+BMJLa8jqzlXwWErm Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable [For the GRUB folks, this is about coreboot commit d67c6876 (Turn CBMEM console into a ring buffer that can persist across reboots) [1]. Julius=E2=80=99 message can be find in the coreboot list archive [2].] Dear Julius, Am Montag, den 10.04.2017, 15:50 -0700 schrieb Julius Werner: [=E2=80=A6] > The change may also cause some hiccups if you're using a newer version of > coreboot with an older version of cbmem (or SeaBIOS or whatever else read= s > the console): it will not crash and it will still print the whole log, bu= t > if the log has rolled over (into "ring buffer mode") it will print lines > out of order. This is unfortunately the best I can do with the way curren= t > readers are implemented. I'm of course also updating the code for cbmem s= o > as soon as you deploy the new version it will be able to display buffers > from both old and new coreboot versions correctly. (I'll send patches to > align SeaBIOS and the Linux memconsole driver in the same manner as soon = as > the coreboot patch is approved.) Could you please also check, if GRUB=E2=80=99s CBMEM console driver, and th= e the command cbmemc to display it need any updates? Thanks, Paul PS: Where can I get your S/MIME certificate, used to sign your email? [1] https://review.coreboot.org/18301 [2] https://mail.coreboot.org/pipermail/coreboot/2017-April/083950.html --=-oaq+BMJLa8jqzlXwWErm Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQQ8+w9d414FAVARIpk9fVorbA4dWAUCWPsEzQAKCRA9fVorbA4d WGDlAJsE+K28SI8uLSJTuzlRYhuaFVfyrgCcDUAGYtWJbvjFJjQ25smxI033BUA= =ttZs -----END PGP SIGNATURE----- --=-oaq+BMJLa8jqzlXwWErm--