From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.dataprom.com ([200.198.101.12]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1MndZa-0003xq-8b for linux-mtd@lists.infradead.org; Tue, 15 Sep 2009 19:20:22 +0000 Received: from [192.168.0.149] (eng009.dataprom.com [192.168.0.149]) by mail.dataprom.com (Postfix) with ESMTPSA id 46549B0004F0 for ; Tue, 15 Sep 2009 15:54:56 -0300 (BRT) Subject: Oops on 2.6.31 with udev and root using ubifs From: Raphael Derosso Pereira To: linux-mtd@lists.infradead.org Content-Type: text/plain; charset="UTF-8" Date: Tue, 15 Sep 2009 16:02:02 -0300 Message-Id: <1253041322.4496.6.camel@eng009> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hello, I have just compiled a UBIFS enable 2.6.31 kernel and when I use it to boot with a NAND ubifs root partition, as soon as the udev daemon starts to populate the nodes, I get a Oops: [ 59.261166] Unable to handle kernel paging request at virtual address fffffff0 [ 59.283061] pgd = c0004000 [ 59.291211] [fffffff0] *pgd=a0906021, *pte=00000000, *ppte=00000000 [ 59.317151] Internal error: Oops: 17 [#1] PREEMPT [ 59.331114] Modules linked in: [ 59.340167] CPU: 0 Not tainted (2.6.31-cmx0sc #20) [ 59.355456] PC is at ubi_leb_read+0x14/0x190 [ 59.368136] LR is at gluebi_read+0xdc/0x114 [ 59.380566] pc : [] lr : [] psr: 60000013 [ 59.380581] sp : e39b1eb8 ip : e39b1ef8 fp : e39b1ef4 [ 59.414702] r10: e3cbe4c0 r9 : 00000200 r8 : 00000000 [ 59.430237] r7 : e393e000 r6 : e3c5b000 r5 : 00000200 r4 : 00000200 [ 59.449648] r3 : 00000000 r2 : e3c5b000 r1 : 00000000 r0 : fffffff0 [ 59.469060] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 59.490795] Control: 0000397f Table: c3d74018 DAC: 00000035 [ 59.507880] Process mtdblockd (pid: 293, stack limit = 0xe39b0278) [ 59.526255] Stack: (0xe39b1eb8 to 0xe39b2000) [ 59.539200] 1ea0: c019effc e39b61c0 [ 59.563754] 1ec0: e3be1640 00000000 00000000 00000200 00000200 e3c5b000 e393e000 00000000 [ 59.588306] 1ee0: 00000200 e3cbe4c0 e39b1f34 e39b1ef8 c0223ef0 c021c068 00000200 00000000 [ 59.612861] 1f00: 00000000 00000000 e3be1640 00000000 e39b1f4c 00000200 00000000 00000000 [ 59.637415] 1f20: 0001f000 e3c5b000 e39b1f84 e39b1f38 c020d0dc c0223e20 00000200 e39b1f54 [ 59.661968] 1f40: e3c5b000 e3be1640 e39b1f6c e393e000 c0190cb0 c019b0c0 00000008 00000008 [ 59.686522] 1f60: e3be1640 00000000 c03fc1dc e3c5b000 00000000 e39ab900 e39b1fc4 e39b1f88 [ 59.711076] 1f80: c020c8a0 c020d08c c02d8350 e39b0000 e39ab910 e39b61c0 e39b1fc4 e3823f08 [ 59.735629] 1fa0: c03fc1dc c020c690 00000000 00000000 00000000 00000000 e39b1ff4 e39b1fc8 [ 59.760183] 1fc0: c005ff28 c020c69c 00000000 00000000 e39b1fd0 e39b1fd0 00000000 00000000 [ 59.784738] 1fe0: 00000000 00000000 00000000 e39b1ff8 c0025fe8 c005feac 2064656c 72642600 [ 59.809306] [] (ubi_leb_read+0x14/0x190) from [] (gluebi_read+0xdc/0x114) [ 59.834650] [] (gluebi_read+0xdc/0x114) from [] (mtdblock_readsect+0x5c/0x134) [ 59.861298] [] (mtdblock_readsect+0x5c/0x134) from [] (mtd_blktrans_thread+0x210/0x32c) [ 59.890244] [] (mtd_blktrans_thread+0x210/0x32c) from [] (kthread+0x88/0x90) [ 59.916376] [] (kthread+0x88/0x90) from [] (kernel_thread_exit+0x0/0x8) [ 59.941211] Code: e92ddff0 e24cb004 e24dd014 ebf823de (e5904000) I think that the problem may be ralated to the fact that /dev/mtd6, which is emulated from ubi0_0 is "double-accessed" without proper lock or something else. Can someone give me a hint? Best Regards, P.S.: I'm not subscribed on the list -- Raphael Derosso Pereira DATAPROM® Departamento de Engenharia Tel.: +55 41 3014-1325 Fax.: +55 41 3014-1201 raphael.pereira@dataprom.com www.dataprom.com