Message-Id: <DC2B75F8-382A-4AFB-9286-4A55EAF7609A@oracle.com>
Date:	Wed, 23 Mar 2011 09:44:01 -0400
From:	Chuck Lever <chuck.lever@...cle.com>
To:	Belisko Marek <marek.belisko@...il.com>
Cc:	Trond.Myklebust@...app.com, broonie@...nsource.wolfsonmicro.com,
	bdowning@...os.net, linux-nfs@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [bisect] kernel 2.6.38 regression with root nfs mounting


On Mar 23, 2011, at 2:30 AM, Belisko Marek wrote:

> Added linux-nfs to CC (to keep history) add added log with nfsdebugroot enabled.
> 
> On Tue, Mar 22, 2011 at 1:34 PM, Chuck Lever <chuck.lever@...cle.com> wrote:
>> 
>> On Mar 22, 2011, at 3:51 AM, Belisko Marek wrote:
>> 
>>> After update from 2.6.38-rc8 to 2.6.38 is mounting rootfs over nfs not possible.
>>> Log:
>>> VFS: Mounted root (nfs filesystem) on device 0:14.
>>> Freeing init memory: 132K
>>> nfs: server 10.146.1.21 not responding, still trying
>>> nfs: server 10.146.1.21 not responding, still trying
>>> 
>>> This is never ending. I make short bisect (not too much commits
>>> between versions)
>>> and bad commit was reported: 53d4737580535e073963b91ce87d4216e434fab5
>>> 
>>> NFS: NFSROOT should default to "proto=udp"
>>> 
>>> I've tested on mini2440 board (DM9000, static IP).
>>> Is there some missing option or something else to be checked?
>> 
>> NFSROOT is supposed to work as it did before 2.6.37.
>> 
>> Enable NFSROOT debugging (see the description of nfsrootdebug in Documentation/filesystems/nfs/nfsroot.txt), try your boot, and then post the contents of your system log to linux-nfs@...r.kernel.org.
>> 
>> --
>> Chuck Lever
>> chuck[dot]lever[at]oracle[dot]com
>> 
>> 
>> 
>> 
>> 
> 
> Linux version 2.6.38-rc7+ (open-nandra@...t) (gcc version 4.5.1
> (Sourcery G++ Lite 2010.09-50) ) #1 Wed Mar 23 07:23:36 CET 2011
> CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
> CPU: VIVT data cache, VIVT instruction cache
> Machine: MINI2440
> Memory policy: ECC disabled, Data cache writeback
> CPU S3C2440A (id 0x32440001)
> S3C24XX Clocks, Copyright 2004 Simtec Electronics
> S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz
> CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
> Kernel command line: console=ttySAC0,115200 noinitrd init=/sbin/init
> mini2440=1b nfsrootdebug root=/dev/nfs rw
> nfsroot=10.146.1.21:/home/open-nandra/rootfs
> ip=10.146.1.199:10.146.1.21::255.20
> PID hash table entries: 256 (order: -2, 1024 bytes)
> Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
> Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
> Memory: 64MB = 64MB total
> Memory: 60536k/60536k available, 5000k reserved, 0K highmem
> Virtual kernel memory layout:
>    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
>    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
>    vmalloc : 0xc4800000 - 0xf6000000   ( 792 MB)
>    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
>    modules : 0xbf000000 - 0xc0000000   (  16 MB)
>      .init : 0xc0008000 - 0xc0029000   ( 132 kB)
>      .text : 0xc0029000 - 0xc03e9bb4   (3843 kB)
>      .data : 0xc03ea000 - 0xc040e220   ( 145 kB)
> SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
> NR_IRQS:85
> irq: clearing pending status 02000000
> irq: clearing subpending status 00000002
> Console: colour dummy device 80x30
> console [ttySAC0] enabled
> Calibrating delay loop... 201.93 BogoMIPS (lpj=504832)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 512
> CPU: Testing write buffer coherency: ok
> gpiochip_add: gpios 288..303 (GPIOK) failed to register
> gpiochip_add: gpios 320..334 (GPIOL) failed to register
> gpiochip_add: gpios 352..353 (GPIOM) failed to register
> NET: Registered protocol family 16
> MINI2440: Option string mini2440=1b
> MINI2440: LCD 0:240x320 [1:800x480] 2:1024x768
> S3C2440: Initialising architecture
> S3C2440: IRQ Support
> S3C244X: Clock Support, DVS off
> bio: create slab <bio-0> at 0
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> s3c-i2c s3c2440-i2c: slave address 0x10
> s3c-i2c s3c2440-i2c: bus frequency set to 98 KHz
> s3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapter
> Advanced Linux Sound Architecture Driver Version 1.0.23.
> NET: Registered protocol family 2
> IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
> TCP established hash table entries: 2048 (order: 2, 16384 bytes)
> TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
> TCP: Hash tables configured (established 2048 bind 2048)
> 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
> RPC: Registered udp transport module.
> RPC: Registered tcp transport module.
> RPC: Registered tcp NFSv4.1 backchannel transport module.
> JFFS2 version 2.2. (NAND) �© 2001-2006 Red Hat, Inc.
> ROMFS MTD (C) 2007 Red Hat, Inc.
> msgmni has been set to 118
> io scheduler noop registered
> io scheduler deadline registered
> io scheduler cfq registered (default)
> Console: switching to colour frame buffer device 200x80
> fb0: s3c2410fb frame buffer device
> s3c2440-uart.0: ttySAC0 at MMIO 0x50000000 (irq = 70) is a S3C2440
> s3c2440-uart.1: ttySAC1 at MMIO 0x50004000 (irq = 73) is a S3C2440
> s3c2440-uart.2: ttySAC2 at MMIO 0x50008000 (irq = 76) is a S3C2440
> brd: module loaded
> at24 0-0050: 1024 byte 24c08 EEPROM, writable, 16 bytes/write
> S3C24XX NAND Driver, (c) 2004 Simtec Electronics
> s3c24xx-nand s3c2440-nand: Tacls=1, 9ns Twrph0=3 29ns, Twrph1=2 19ns
> s3c24xx-nand s3c2440-nand: NAND soft ECC
> NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB
> 3,3V 8-bit)
> Creating 4 MTD partitions on "nand":
> 0x000000000000-0x000000040000 : "u-boot"
> ftl_cs: FTL header not found.
> 0x000000040000-0x000000060000 : "u-boot-env"
> ftl_cs: FTL header not found.
> 0x000000060000-0x000000560000 : "kernel"
> ftl_cs: FTL header not found.
> 0x000000560000-0x000010000000 : "root"
> ftl_cs: FTL header not found.
> dm9000 Ethernet Driver, V1.31
> eth0: dm9000e at c486a300,c486e304 IRQ 51 MAC: 08:08:11:18:12:27 (chip)
> ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
> s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
> s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 2 ports detected
> usbcore: registered new interface driver libusual
> s3c2440-usbgadget s3c2440-usbgadget: S3C2440: increasing FIFO to 128 bytes
> mousedev: PS/2 mouse device common for all mice
> input: gpio-keys as /devices/platform/gpio-keys/input/input0
> S3C24XX RTC, (c) 2004,2006 Simtec Electronics
> s3c-rtc s3c2410-rtc: rtc disabled, re-enabling
> s3c-rtc s3c2410-rtc: rtc core: registered s3c as rtc0
> i2c /dev entries driver
> S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
> s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
> cpuidle: using governor ladder
> sdhci: Secure Digital Host Controller Interface driver
> sdhci: Copyright(c) Pierre Ossman
> s3c-sdi s3c2440-sdi: powered down.
> s3c-sdi s3c2440-sdi: mmc0 - using pio, sw SDIO IRQ
> s3c-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> usbcore: registered new interface driver usbhid
> usbhid: USB HID core driver
> ALSA device list:
>  No soundcards found.
> TCP cubic registered
> NET: Registered protocol family 17
> Registering the dns_resolver key type
> s3c-rtc s3c2410-rtc: setting system clock to 2011-03-23 06:01:06 UTC
> (1300860066)
> s3c-sdi s3c2440-sdi: running at 398kHz (requested: 400kHz).
> s3c-sdi s3c2440-sdi: running at 16875kHz (requested: 25000kHz).
> s3c-sdi s3c2440-sdi: running at 16875kHz (requested: 25000kHz).
> mmc0: new SD card at address b368
> mmcblk0: mmc0:b368 SD    970 MiB
> mmcblk0: p1 p2 p3
> eth0: link down
> IP-Config: Complete:
>     device=eth0, addr=10.146.1.199, mask=255.255.255.0, gw=255.255.255.255,
>     host=mini2440, domain=, nis-domain=(none),
>     bootserver=10.146.1.21, rootserver=10.146.1.21, rootpath=
> Root-NFS: nfsroot=/home/open-nandra/rootfs
> NFS: nfs mount opts='udp,nolock,addr=10.146.1.21'
> NFS:   parsing nfs mount option 'udp'
> NFS:   parsing nfs mount option 'nolock'
> NFS:   parsing nfs mount option 'addr=10.146.1.21'
> NFS: MNTPATH: '/home/open-nandra/rootfs'
> NFS: sending MNT request for 10.146.1.21:/home/open-nandra/rootfs
> eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
> NFS: received 1 auth flavors
> NFS:   auth flavor[0]: 1
> NFS: MNT request succeeded
> NFS: using auth flavor 1
> VFS: Mounted root (nfs filesystem) on device 0:14.
> Freeing init memory: 132K
> nfs: server 10.146.1.21 not responding, still trying
> nfs: server 10.146.1.21 not responding, still trying
> 
> This is behavior for commit 53d4737580535e073963b91ce87d4216e434fab5
> For commit before it works properly.

What does "rpcinfo -p 10.146.1.21" output look like?  Is NFS over UDP enabled on your server?

-- 
Chuck Lever
chuck[dot]lever[at]oracle[dot]com




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