From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: Long boot delay on 460EX with 2.6.28-rc8 From: Michael Ellerman To: avorontsov@ru.mvista.com In-Reply-To: <20081218190136.GA7752@oksana.dev.rtsoft.ru> References: <21070179.post@talk.nabble.com> <20081218160256.GA14419@oksana.dev.rtsoft.ru> <20081218190136.GA7752@oksana.dev.rtsoft.ru> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-WSNn9sNrbBRldZuQXk7D" Date: Fri, 19 Dec 2008 09:57:43 +1100 Message-Id: <1229641063.8584.1.camel@localhost> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, Felix Radensky Reply-To: michael@ellerman.id.au List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --=-WSNn9sNrbBRldZuQXk7D Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Thu, 2008-12-18 at 22:01 +0300, Anton Vorontsov wrote: > On Thu, Dec 18, 2008 at 12:51:29PM -0600, Kumar Gala wrote: > >> I saw somewhat similar behaviour on 83xx target, the cause was > >> that my .config file contained bogus UDBG_RTAS_CONSOLE=3Dy symbol > >> (or was it PPC_EARLY_DEBUG_RTAS_PANEL=3Dy? Or HVC_UDBG=3Dy? I don't > >> quite remember). > >> > >> Obviously, on 83xx we don't have RTAS or HVC stuff, but kernel > >> didn't oops or hang completely, it was busy with executing various > >> delays in those drivers and then just continued to load. > > > > Why are these drivers even doing anything on 83xx? Seems like they nee= d=20 > > something to bind against or some detection of "HW". >=20 > Early console/UDBG is known to cause problems if enabled on > inappropriate hardware. They start working very early, so it's hard > for them to do the hw detection (no device tree yet, I presume). Yes that's the whole point, it's _EARLY_ debug, there's even a big fat warning in the Kconfig. cheers --=20 Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person --=-WSNn9sNrbBRldZuQXk7D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAklK1WcACgkQdSjSd0sB4dIkCwCbBI4oqqHc1Q8aPIMPKOZSFEpl 1xoAoIjUv4BkmVkUgKQeXqpEnRYE/idX =gkWk -----END PGP SIGNATURE----- --=-WSNn9sNrbBRldZuQXk7D--