From owner-freebsd-ppc@freebsd.org Tue Mar 27 21:23:53 2018 Return-Path: Delivered-To: freebsd-ppc@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id ED916F5E40D for ; Tue, 27 Mar 2018 21:23:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8578B82FF7 for ; Tue, 27 Mar 2018 21:23:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id AC56A6902 for ; Tue, 27 Mar 2018 21:23:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w2RLNpNM099456 for ; Tue, 27 Mar 2018 21:23:51 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w2RLNpbH099455 for freebsd-ppc@FreeBSD.org; Tue, 27 Mar 2018 21:23:51 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: freebsd-ppc@FreeBSD.org Subject: [Bug 226974] kernel DSI read trap at boot Date: Tue, 27 Mar 2018 21:23:51 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: leandro.lupori@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-ppc@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Mar 2018 21:23:53 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D226974 --- Comment #3 from Leandro Lupori --- After some more investigation, I found that the part of the commit that "br= oke" the boot on powerpc64 with FDT (that is the default now) was the bdomain[BUF_DOMAINS] array. By simply adding this array in vfs_bio.c in the previous commit I'm able to reproduce the issue. On powerpc64 this array has a size of about 520KB, mainly because the defau= lt MAXCPU value for it is 256, which makes the following bufdomain field take a lot of space: struct bufqueue bd_subq[MAXCPU + 1]; /* Per-cpu sub queues + global */ If I change bd_subq size to 17, for instance, then I'm able to go further, = but then I get stuck after this message: usb_needs_explore_all: no devclass I don't know if this is related to same issue or not. However, it is still not clear to me why this extra KBs are a problem for powerpc64. It is probably something related to FDT, because unsetting "usef= dt" in the bootloader makes the system bootable again, even without the change above. --=20 You are receiving this mail because: You are the assignee for the bug.=