From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754384Ab2IDHlo (ORCPT ); Tue, 4 Sep 2012 03:41:44 -0400 Received: from mga02.intel.com ([134.134.136.20]:7230 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753816Ab2IDHlm (ORCPT ); Tue, 4 Sep 2012 03:41:42 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,365,1344236400"; d="asc'?scan'208";a="188619927" Message-ID: <1346744796.12610.6.camel@sauron.fi.intel.com> Subject: Re: RCU warning during UBI file system mount From: Artem Bityutskiy Reply-To: dedekind1@gmail.com To: Subodh Nijsure , "Paul E. McKenney" Cc: linux-mtd@lists.infradead.org, Linux Kernel Maling List Date: Tue, 04 Sep 2012 10:46:36 +0300 In-Reply-To: <5042EC5D.1010207@grid-net.com> References: <5042EC5D.1010207@grid-net.com> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-0pWY+RwNMLwGVzlGhmot" X-Mailer: Evolution 3.2.3 (3.2.3-3.fc16) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-0pWY+RwNMLwGVzlGhmot Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Let's CC LKML and Paul. =20 On Sat, 2012-09-01 at 22:19 -0700, Subodh Nijsure wrote: > Hello, >=20 > I am running 3.6-rc4 kernel on my MX28 based board and every time I=20 > mount UBI file system I see following warning. > Anybody else seen this errors, particularly those running it on MXS=20 > platform? >=20 > I haven't debugged RCU warnings before any clues as to what is the=20 > source of this warning is, should I be looking at=20 > start_dma_without_bch_irq() code? Would appreciate any pointers in=20 > fixing this... >=20 > [ 4.280000] WARNING: at /opt/git/kernel-mainline/kernel/rcutiny.c:75= =20 > rcu_idle_enter_common.clone.7+0x90/0xac() > [ 4.280000] Current pid: 1 comm: swapper / Idle pid: 0 comm: swapper > [ 4.280000] Modules linked in: > [ 4.280000] [] (unwind_backtrace+0x0/0x130) from=20 > [] (warn_slowpath_common+0x4c/0x64) > [ 4.280000] [] (warn_slowpath_common+0x4c/0x64) from=20 > [] (warn_slowpath_fmt+0x30/0x40) > [ 4.280000] [] (warn_slowpath_fmt+0x30/0x40) from=20 > [] (rcu_idle_enter_common.clone.7+0x90/0xac) > [ 4.280000] [] (rcu_idle_enter_common.clone.7+0x90/0xac)=20 > from [] (rcu_irq_exit+0x3c/0x78) > [ 4.280000] [] (rcu_irq_exit+0x3c/0x78) from []= =20 > (handle_IRQ+0x34/0x84) > [ 4.280000] [] (handle_IRQ+0x34/0x84) from []=20 > (__irq_svc+0x34/0x58) > [ 4.280000] [] (__irq_svc+0x34/0x58) from []=20 > (schedule_timeout+0xdc/0x16c) > [ 4.280000] [] (schedule_timeout+0xdc/0x16c) from=20 > [] (wait_for_common+0xb4/0x160) > [ 4.280000] [] (wait_for_common+0xb4/0x160) from=20 > [] (start_dma_without_bch_irq+0x6c/0xa8) > [ 4.280000] [] (start_dma_without_bch_irq+0x6c/0xa8) from= =20 > [] (gpmi_send_command+0x120/0x154) > [ 4.280000] [] (gpmi_send_command+0x120/0x154) from=20 > [] (gpmi_cmd_ctrl+0x44/0x6c) > [ 4.280000] [] (gpmi_cmd_ctrl+0x44/0x6c) from []= =20 > (nand_command_lp+0xe8/0x270) > [ 4.280000] [] (nand_command_lp+0xe8/0x270) from=20 > [] (nand_do_read_ops+0x124/0x444) > [ 4.280000] [] (nand_do_read_ops+0x124/0x444) from=20 > [] (nand_read+0x54/0x78) > [ 4.280000] [] (nand_read+0x54/0x78) from []=20 > (part_read+0x48/0x80) > [ 4.280000] [] (part_read+0x48/0x80) from []=20 > (mtd_read+0x88/0xb4) > [ 4.280000] [] (mtd_read+0x88/0xb4) from []=20 > (ubi_io_read+0xb0/0x3e8) > [ 4.280000] [] (ubi_io_read+0xb0/0x3e8) from []= =20 > (ubi_eba_read_leb+0x198/0x4bc) > [ 4.280000] [] (ubi_eba_read_leb+0x198/0x4bc) from=20 > [] (ubi_leb_read+0xf4/0x16c) > [ 4.280000] [] (ubi_leb_read+0xf4/0x16c) from []= =20 > (ubifs_leb_read+0x24/0x88) > [ 4.280000] [] (ubifs_leb_read+0x24/0x88) from []= =20 > (ubifs_read_node+0xa8/0x2e4) > [ 4.280000] [] (ubifs_read_node+0xa8/0x2e4) from=20 > [] (ubifs_read_sb_node+0x54/0x78) > [ 4.280000] [] (ubifs_read_sb_node+0x54/0x78) from=20 > [] (ubifs_read_superblock+0xc8c/0x133c) > [ 4.280000] [] (ubifs_read_superblock+0xc8c/0x133c) from=20 > [] (ubifs_mount+0x73c/0x1bc0) > [ 4.280000] [] (ubifs_mount+0x73c/0x1bc0) from []= =20 > (mount_fs+0x44/0x184) > [ 4.280000] [] (mount_fs+0x44/0x184) from []=20 > (vfs_kern_mount+0x4c/0xc0) > [ 4.280000] [] (vfs_kern_mount+0x4c/0xc0) from []= =20 > (do_kern_mount+0x34/0xd0) > [ 4.280000] [] (do_kern_mount+0x34/0xd0) from []= =20 > (do_mount+0x15c/0x73c) > [ 4.280000] [] (do_mount+0x15c/0x73c) from []=20 > (sys_mount+0x84/0xc4) > [ 4.280000] [] (sys_mount+0x84/0xc4) from []=20 > (do_mount_root+0x24/0xb0) > [ 4.280000] [] (do_mount_root+0x24/0xb0) from []= =20 > (mount_block_root+0xe8/0x214) > [ 4.280000] [] (mount_block_root+0xe8/0x214) from=20 > [] (prepare_namespace+0x8c/0x180) > [ 4.280000] [] (prepare_namespace+0x8c/0x180) from=20 > [] (kernel_init+0x16c/0x1b4) > [ 4.280000] [] (kernel_init+0x16c/0x1b4) from []= =20 > (kernel_thread_exit+0x0/0x8) > [ 4.280000] ---[ end trace 4d36b722759fdc4f ]--- > [ 4.950000] UBIFS DBG (pid 58): ubifs_bg_thread: background thread=20 > "ubifs_bgt0_0" started, PID 58 >=20 > -Subodh >=20 > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ --=20 Best Regards, Artem Bityutskiy --=-0pWY+RwNMLwGVzlGhmot Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJQRbHcAAoJECmIfjd9wqK0dtYP/2wMKq0gjRDEvDBpe3m9rRq3 +Ys/4FzdNFJE7Dvpiv/7FGihUAT1ubXw1fUQEu1HxyuJ+zEnSRZXpvBmGDcUhThN 4JTawNDh4mMckXDh+YSyyqsSCq60lHEpYyViC+g6B+bln3rO4KZiDN65hHtRV7TM pckASQcOXKTN0WJJUuPoyK8hhj9RzZ2/d5rW1G63EEUyB2k4yYVBrv13pMR+ung0 e77INbT0026ZiFs4DgiZaR99XoaMPZ5Mh5O0916q8NApZ4fTarM8yUoWW4yM3IYA FvxB4F8kF2Ki22tu7YUVu+Yr9IXT+zCY0m/cY63f7Cyxr43afRW7McCiEeFGUlcS 949z9pCnel90VdejvH/QZV9M4A+1PGRoSsZjwXWoLo0uttpg0FgmuC67TiVto4Go Pb3SqLJ3fmu6CJlLNE9v0Gn0HRjyxdxe8UjSM1yLqNDs+YzMyKoO96M57nqsXehy W82YFcdO45VHnOtMuXdXekSCBx4aM7HoQbIo6HTnYZaId0n1i4KKzItc7ALIeFZY 8As60FheE2+A9TSP3NY5WqSj+s0rWTIVCg6pTpyhAMa0ddi1kHH9gf9o7eRoZlpB 1GI5cZFuTIzsmACjorndeFpX+TtXsoBB6NYlc7H+sebl7S1rQwFx352k4z0N7l6c Ubo6munO2bGldJhs3WfH =ClU6 -----END PGP SIGNATURE----- --=-0pWY+RwNMLwGVzlGhmot--