From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: RE: [PATCH v2 0/6] mdadm support for journal device of RAID-4/5/6 Date: Mon, 19 Oct 2015 13:11:40 +1100 Message-ID: <87lhazli8z.fsf@notabene.neil.brown.name> References: <1444369906-1804157-1-git-send-email-songliubraving@fb.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Song Liu Cc: Shaohua Li , linux-raid@vger.kernel.org List-Id: linux-raid.ids --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Song Liu writes: > Hi Neil,=20 > > Could you please share some insights about kernel and mdadm patches for=20 > journal device in RAID-4/5/6? What shall we do next to move this approach= =20 > ahead?=20 I hadn't been looking at the mdadm patches until I was fairly comfortable with the kernel code. I think we have reached that state now and I have just looked at your mdadm patches. These seem quite sensible and thorough - thanks. I have applied them to by 'master' branch. Would you be able to write a few test scripts to go in the 'tests' directory? Some of your changelog comment demonstrated how some commands would work and others would give useful error messages. If there were test scripts which confirmed the code continues to do that (and maybe more) that would be great. Also a section of the md.4 man page (similar to "BITMAP WRITE-INTENT LOGGING" and "BAD BLOCK LIST") which gave a general outline of the purpose, value, and possible costs, of using a journal would be really helpful. Thanks, NeilBrown --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWJFFcAAoJEDnsnt1WYoG5vj0P/iVhLFAW6O3XbosekUmoBVhz unyYWcsBmJ0SwAo17GYnDJovKLVDJ2GXqwRk1laOTHXSG39OJB0t9BgPxzEQEPuq 8eUqEhJSyGimgQhmv+Q7y3qWJpQ4GR38/dPxGivZJC6EiQLonFdfAXTHZMZEpQ6N RyrbIcg+GFK70VzpHS39aeHB6eyNM7yDCGaY6d0Vhic94C4L/t15pvrBgzo5/09m 3XAbIwqh7uKSbhSrveizk+MnLkqWkn5/KDBzuaPHT4nLSXsIZ3Fd0JwpRvm6tAeu p/Y4DCMCGt9LR9mntnVtjR9TFHcBrzQ4w4cu2VIi0u60DbEATe7BB4vr1MLIfNuS 5Hn9OieMWnukFCvEsFbKtr/7MqN+Kt0qFpkshT2elOiVN4Fvbs+icdOuLD2dwTUE WJXy2mI+9g6FT4ae+hpR2SHlI442r3bzY4Dt+/7gfUuUvA9gnPzhf1XRnDjE+wdm uZ2ZSIqYC5EP4wTzQvkotxvaqJmn2vOKhs2TmimwkoDY4KXAsSO2uaOqjynC1GB3 MdJMLtEH2bb6frT1jljGFBeFa9x6yPCHCNCFTMukV7KHJhjOBn0UxRE+SP60IJn4 E9UhWQuTPSwGmeyU9l60Z36AIIbTZLLdUCvklwj7hCgO74F7cCHb5AFNkPbsGENm 8teOQMzlQMErfevjvrsq =Zsah -----END PGP SIGNATURE----- --=-=-=--