From mboxrd@z Thu Jan 1 00:00:00 1970 From: tglx@linutronix.de (Thomas Gleixner) Date: Wed, 19 Feb 2003 15:42:06 +0100 Subject: Kernel oops with an unclean unmounted filesystem In-Reply-To: References: Message-ID: <200302191542.06920.tglx@linutronix.de> To: linux-mtd@lists.infradead.org List-Id: linux-mtd.lists.infradead.org On Wednesday 19 February 2003 13:35, Enrico Scholz wrote: > Indeed, when restarting the device and mounting the filesystem > the kernel oopses: > | jffs2_get_inode_nodes() for ino 283 returned -12 > | Checked all inodes but still 0x44 bytes of unchecked space? > | kernel BUG at fs/jffs2/gc.c:140! > | Unable to handle kernel NULL pointer dereference at virtual address > | 00000000 ... > | Backtrace: > | [] (__bug+0x0/0x58) from [] > | (jffs2_garbage_collect_pass+0x240/0x66c) r4 = C1E38000 > | [] (jffs2_garbage_collect_pass+0x0/0x66c) from [] > | (jffs2_garbage_collect_thread+0x1c4/0x200) r8 = FFFFFFFF r7 = 00000000 > | r6 = 00000000 r5 = C1F2E000 > | r4 = C1E38000 > | [] (jffs2_garbage_collect_thread+0x0/0x200) from [] > | (kernel_thread+0x40/0x48) r6 = C1F2E014 r5 = 00000000 r4 = C1F2E000 > | Code: 1b005243 e59f0014 eb005241 e3a03000 (e5833000) Strange > I am running the 2.5.59 kernel + rmk patches on an ARM XScale > platform. I tried the recent jffs2 fs-driver from CVS also but > the oops still happens. The unclean "unmounting" happened with > the original 2.5.59 JFFS2 driver. > I get an I/O error when reading the questionable directory before > the gc-thread dies. > Does there exists a way to recover or have I to recreate the > filesystem from scratch? It should be a way. But first we have to know how it happens Can you please 1. build a device image (cat /dev/mtdX >image) 2. turn on debugging in JFFS2 (JFFS2_DEBUG = 1) 3. set debug level to 9 before mounting the fs (echo 9 >/proc/sys/kernel/printk) 4. get logs from serial console (not from klogd) and record them. Send the logs and image to me in private -- Thomas ________________________________________________________________________ linutronix - competence in embedded & realtime linux http://www.linutronix.de mail: tglx at linutronix.de