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Message-ID: <20100427091650.GG27497@kernel.dk> Date: Tue, 27 Apr 2010 11:16:51 +0200 From: Jens Axboe <jens.axboe@...cle.com> To: Paolo Minazzi <paolo.minazzi@...il.com> Cc: Jörn Engel <joern@...fs.org>, Linus Torvalds <torvalds@...ux-foundation.org>, David Woodhouse <dwmw2@...radead.org>, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org, Christoph Hellwig <hch@...radead.org> Subject: Re: [PATCH 2/2] [MTD] Call bdi_init() and bdi_register() On Tue, Apr 27 2010, Paolo Minazzi wrote: > I have tried this patch. > I have enabled LOGFS, but not mounted partition with it. > /dev/mtdblock1 is my romfs root partition and it is OK. > > The problem is that init cannot mount my /dev/mtdblock1 romfs root. > > This is the fault : > Platform: Cirrus Logic EDB9315A Board (ARM920T) Rev A > Copyright (C) 2000, 2001, 2002, Red Hat, Inc. > |---------------------------------------------- > Raw file loaded 0x00080000-0x001dce6b, assumed entry at > 0x00080000----------------------------------------------------------- > RedBoot> exec -s 0x00b00000 -r 0x00a00000 -c "root=/dev/mtdblock1 > console=ttyAM console=tty1"-------------------------------- > ENTRY=0xc0008000------------------------------------------------------------------------------------------------------------- > LENGTH=0x00300000------------------------------------------------------------------------------------------------------------ > BASE_ADDR=0x00080000--------------------------------------------------------------------------------------------------------- > Using base address 0x00080000 and length > 0x00300000-------------------------------------------------------------------------- > Uncompressing Linux... done, booting the kernel. > Linux version 2.6.34-rc5 (root@...kstar) (gcc version 3.4.3) #18 Tue > Apr 27 10:55:55 CEST 2010 > CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 > CPU: VIVT data cache, VIVT instruction cache > Machine: Cirrus Logic EDB9315A Evaluation Board > Memory policy: ECC disabled, Data cache writeback > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512 > Kernel command line: root=/dev/mtdblock1 console=ttyAM console=tty1 > 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: 126928k/126928k available, 4144k reserved, 0K highmem > Virtual kernel memory layout: > vector : 0xffff0000 - 0xffff1000 ( 4 kB) > fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) > DMA : 0xffc00000 - 0xffe00000 ( 2 MB) > vmalloc : 0xc8800000 - 0xfe800000 ( 864 MB) > lowmem : 0xc0000000 - 0xc8000000 ( 128 MB) > modules : 0xbf000000 - 0xc0000000 ( 16 MB) > .init : 0xc0008000 - 0xc0036000 ( 184 kB) > .text : 0xc0036000 - 0xc02ab000 (2516 kB) > .data : 0xc02ac000 - 0xc02c4e00 ( 100 kB) > SLUB: Genslabs=11, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 > Hierarchical RCU implementation. > NR_IRQS:120 > VIC @fefb0000: id 0x00041190, vendor 0x41 > VIC @fefc0000: id 0x00041190, vendor 0x41 > Console: colour dummy device 80x30 > console [tty1] enabled > Calibrating delay loop... 99.73 BogoMIPS (lpj=498688) > Mount-cache hash table entries: 512 > CPU: Testing write buffer coherency: ok > NET: Registered protocol family 16 > ep93xx clock: PLL1 running at 200 MHz, PLL2 at 48 MHz > ep93xx clock: FCLK 200 MHz, HCLK 100 MHz, PCLK 50 MHz > ep93xx dma_m2p: M2P DMA subsystem initialized > bio: create slab <bio-0> at 0 > SCSI subsystem initialized > usbcore: registered new interface driver usbfs > usbcore: registered new interface driver hub > usbcore: registered new device driver usb > NET: Registered protocol family 2 > IP route cache hash table entries: 1024 (order: 0, 4096 bytes) > TCP established hash table entries: 4096 (order: 3, 32768 bytes) > TCP bind hash table entries: 4096 (order: 2, 16384 bytes) > TCP: Hash tables configured (established 4096 bind 4096) > TCP reno registered > UDP hash table entries: 256 (order: 0, 4096 bytes) > UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) > NET: Registered protocol family 1 > JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc. > ***REGISTER LOGFS > ***REGISTER LOGFS DONE ret=0 > ROMFS MTD (C) 2007 Red Hat, Inc. > msgmni has been set to 247 > io scheduler noop registered > io scheduler deadline registered > io scheduler cfq registered (default) > Console: switching to colour frame buffer device 100x37 > graphics fb0: registered. Mode = 800x600-16 > Serial: AMBA driver > apb:uart1: ttyAM0 at MMIO 0x808c0000 (irq = 52) is a AMBA > console [ttyAM0] enabled > apb:uart2: ttyAM1 at MMIO 0x808d0000 (irq = 54) is a AMBA > apb:uart3: ttyAM2 at MMIO 0x808e0000 (irq = 55) is a AMBA > dev->num_resources=1 > physmap platform flash device: 02000000 at 60000000 > physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank > physmap-flash.0: Found 1 x16 devices at 0x1000000 in 16-bit bank > Intel/Sharp Extended Query Table at 0x0031 > Intel/Sharp Extended Query Table at 0x0031 > Using buffer write method > cfi_cmdset_0001: Erase suspend on write enabled > cmdlinepart partition parsing not available > Searching for RedBoot partition table in physmap-flash.0 at offset 0x1fe0000 > 6 RedBoot partitions found on MTD device physmap-flash.0 > Creating 6 MTD partitions on "physmap-flash.0": > 0x000000000000-0x000000040000 : "RedBoot" > 0x000000040000-0x000000b40000 : "ramdisk" > 0x000000b40000-0x000000e40000 : "zImage" > 0x000000e40000-0x000001fc0000 : "jffs2" > 0x000001fc0000-0x000001fe0000 : "RedBoot config" > 0x000001fe0000-0x000002000000 : "FIS directory" > PPP generic driver version 2.4.2 > PPP Deflate Compression module registered > PPP BSD Compression module registered > ep93xx-eth version 0.1 loading > eth0: ep93xx on-chip ethernet, IRQ 39, 00:00:11:22:33:36 > ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver > ep93xx-ohci ep93xx-ohci: EP93xx OHCI > ep93xx-ohci ep93xx-ohci: new USB bus registered, assigned bus number 1 > ep93xx-ohci ep93xx-ohci: irq 56, io mem 0x80020000 > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 3 ports detected > usbcore: registered new interface driver cdc_acm > cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and > ISDN adapters > Initializing USB Mass Storage driver... > usbcore: registered new interface driver usb-storage > USB Mass Storage support registered. > ep93xx-rtc ep93xx-rtc: rtc core: registered ep93xx-rtc as rtc0 > usbcore: registered new interface driver usbhid > usbhid: USB HID core driver > TCP cubic registered > NET: Registered protocol family 17 > Last power-down at UTC 08:47:16 on 27/04/2010 > ep93xx-rtc ep93xx-rtc: setting system clock to 2010-04-27 08:47:16 UTC > (1272358036) > VFS: Cannot open root device "mtdblock1" or unknown-block(31,1) > Please append a correct "root=" boot option; here are the available partitions: > 1f00 256 mtdblock0 (driver?) > 1f01 11264 mtdblock1 (driver?) > 1f02 3072 mtdblock2 (driver?) > 1f03 17920 mtdblock3 (driver?) > 1f04 128 mtdblock4 (driver?) > 1f05 128 mtdblock5 (driver?) > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,1) > Backtrace: > [<c003a3dc>] (dump_backtrace+0x0/0x12c) from [<c003a520>] (dump_stack+0x18/0x1c) > r7:c7c11000 r6:fffffffb r5:c7c11000 r4:00000000 > [<c003a508>] (dump_stack+0x0/0x1c) from [<c0046628>] (panic+0x3c/0xc4) > [<c00465ec>] (panic+0x0/0xc4) from [<c0008d58>] (mount_block_root+0x110/0x2e8) > r3:00000000 r2:20000013 r1:c7c27f58 r0:c0276b44 > [<c0008c48>] (mount_block_root+0x0/0x2e8) from [<c0008f84>] > (mount_root+0x54/0x6c) > [<c0008f30>] (mount_root+0x0/0x6c) from [<c0009094>] > (prepare_namespace+0xf8/0x194) > r5:c001a56c r4:c001a570 > [<c0008f9c>] (prepare_namespace+0x0/0x194) from [<c0008aa4>] > (kernel_init+0x114/0x15c) > r6:c0019b0c r5:c0019d5c r4:c02c4e18 > [<c0008990>] (kernel_init+0x0/0x15c) from [<c0048e98>] (do_exit+0x0/0x628) > r6:00000000 r5:00000000 r4:00000000 > > > > If I disable logfs, my root /dev/mtdblock1 is mounted correclty. So this issue looks unrelated, but a bug none the less (if just enabling logfs breaks the mount). -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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