From mboxrd@z Thu Jan 1 00:00:00 1970 From: amit.virdi@st.com (Amit Virdi) Date: Wed, 13 Feb 2013 17:59:29 +0530 Subject: Need advice: unable to mount filesystem Message-ID: <511B8729.8040908@st.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, I have ported the code for my MMUless SoC from Kernel 3.3 to 3.8-rc6. I've compiled a flat cramfs format FS. This used to work with the SoC code over Kernel 3.3. I copied this FS in the flash. I have done various checks such as the mtd partitions this kernel is creating are in accordance with the layout of the flash, command line arguments are correct, all the relevant configuration options are enabled during kernel configuration etc. I have tried mounting the filesystem from DDR, that too with no success. One observation is that before mounting the FS, the kernel throws a warning: -- Warning: unable to open an initial console. -- I have even tried using initramfs (compiled kernel with busybox binary). All of these used to run with Kernel 3.3. Same filesystem (copied in the flash is working with the older kernel). I guess I'm missing something trivial here but not able to figure out. I have enabled the following flags in the defconfig (pasting only relevant): CONFIG_BINFMT_FLAT CONFIG_BLK_DEV_INITRD CONFIG_MTD_BLOCK CONFIG_CRAMFS CONFIG_AEABI Can anyone suggest what I might be missing? Any help would be appreciated. Logfile is attached... Thanks Amit Virdi -------------- next part -------------- CPU: xxxx DRAM: 128 MiB Flash: 16 MiB u-boot> bootm 0x23000000 ## Booting kernel from Legacy Image at 23000000 ... Image Name: Linux-3.8.0-rc6-00086-gb334582-d Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 1168056 Bytes = 1.1 MiB Load Address: 20008000 Entry Point: 20008000 Loading Kernel Image ... OK OK Starting kernel ... Uncompressing Linux... done, booting the kernel. Booting Linux on physical CPU 0x0 Linux version 3.8.0-rc6-00086-gb334582-dirty (amitvi at DLH10016) (gcc version 4.6.2 20110813 (STMicroelectronics/Linux Base 4.6.2-99) (GCC) ) #37 Wed Feb 13 11:39:33 IST 2013 CPU: ARMv7 Processor [411fc143] revision 3 (ARMv7), cr=08c51c7d CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache Machine: ST-xxxx-EVB Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512 Kernel command line: console=ttyAMA0,115200 root=/dev/mtdblock3 rootfstype=cramfs PID hash table entries: 512 (order: -1, 2048 bytes) Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) Memory: 128MB = 128MB total Memory: 127528k/127528k available, 3544k reserved, 0K highmem Virtual kernel memory layout: vector : 0x00000000 - 0x00001000 ( 4 kB) fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) vmalloc : 0x00000000 - 0xffffffff (4095 MB) lowmem : 0x20000000 - 0x28000000 ( 128 MB) .text : 0x20008000 - 0x201f70dc (1981 kB) .init : 0x201f8000 - 0x2020c48c ( 82 kB) .data : 0x2020e000 - 0x20229be0 ( 111 kB) .bss : 0x20229be0 - 0x2025ad74 ( 197 kB) SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 NR_IRQS:104 VIC @8e000000: id 0x00041192, vendor 0x41 VIC @8e001000: id 0x00041192, vendor 0x41 sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 4294967286ms Console: colour dummy device 80x30 Calibrating delay loop... 275.25 BogoMIPS (lpj=1376256) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 Serial: AMBA PL011 UART driver uart: ttyAMA0 at MMIO 0x85000000 (irq = 17) is a PL011 rev3 console [ttyAMA0] enabled bio: create slab at 0 SCSI subsystem initialized Switching to clocksource tmr1 jffs2: version 2.2. (NAND) ? 2001-2006 Red Hat, Inc. msgmni has been set to 249 Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) brd: module loaded st: Version 20101219, fixed bufsize 32768, s/g segs 256 osst :I: Tape driver with OnStream support version 0.99.4 osst :I: $Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $ SCSI Media Changer driver v0.25 sfc-nor sfc-nor: found device: w25q128, size = 1000000 (16MiB) erasesize = 0x00010000 (64KiB) Creating 4 MTD partitions on "NOR": 0x000000000000-0x000000010000 : "X-loader" 0x000000010000-0x000000040000 : "U-Boot" 0x000000040000-0x000000240000 : "Kernel" 0x000000240000-0x000001000000 : "Root File System" Warning: unable to open an initial console. VFS: Cannot open root device "mtdblock3" or unknown-block(31,3): error -14 Please append a correct "root=" boot option; here are the available partitions: 1f00 64 mtdblock0 (driver?) 1f01 192 mtdblock1 (driver?) 1f02 2048 mtdblock2 (driver?) 1f03 14080 mtdblock3 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,3) [<2000cb50>] (unwind_backtrace+0x0/0xf8) from [<2018655c>] (panic+0x8c/0x1d8) [<2018655c>] (panic+0x8c/0x1d8) from [<201f8d58>] (mount_block_root+0x1fc/0x2b8) [<201f8d58>] (mount_block_root+0x1fc/0x2b8) from [<201f90c0>] (prepare_namespace+0x160/0x1b8) [<201f90c0>] (prepare_namespace+0x160/0x1b8) from [<20185984>] (kernel_init+0x8/0xe4) [<20185984>] (kernel_init+0x8/0xe4) from [<20008e98>] (ret_from_fork+0x14/0x3c)