Hi, I'm completely new to RT problematics and try to run rt kernel on mini2440 board (s3c2440). First I apply rt patch to 2.6.33.7 kernel then fix some compilation issues. Main issue is add support for HR timers to (as I understand without HR realtime makes no sense). I made some hacking Âand system seems boot correctly but hang on: sched: RT throttling activated. It is related to schedule_clock function() which is missing in my implementation? s3c2440 have only 3 16 bit timers.Any ideas what to check? Complete log: Uncompressing Linux... done, booting the kernel. Linux version 2.6.33.7.2-rt30 (open-nandra@linux) (gcc version 4.3.5 (Buildroot 2010.08-rc1) ) #14 PREEMPT RT Wed Dec 22 15:20:19 CET 2010 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. ÂTotal pages: 16256 Kernel command line: root=/dev/mtdblock3 rootfstype=jffs2 console=ttySAC0,115200 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: 59348KB available (4124K code, 1151K data, 156K init, 0K highmem) Real-Time Preemption Support (C) 2004-2007 Ingo Molnar Experimental preemptable hierarchical RCU implementation. NR_IRQS:85 irq: clearing pending status 02000000 irq: clearing subpending status 00000002 tcon=600000 Console: colour dummy device 80x30 console [ttySAC0] enabled Calibrating delay loop... 201.93 BogoMIPS (lpj=504832) Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok NET: Registered protocol family 16 MINI2440: Option string mini2440=0tb MINI2440: 't' ignored, touchscreen not compiled in MINI2440: LCD [0:240x320] 1:800x480 2:1024x768 S3C2440: Initialising architecture S3C2440: IRQ Support S3C24XX DMA Driver, Copyright 2003-2006 Simtec Electronics DMA channel 0 at c4808000, irq 33 DMA channel 1 at c4808040, irq 34 DMA channel 2 at c4808080, irq 35 DMA channel 3 at c48080c0, irq 36 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 1.0.21. 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: 3, 57344 bytes) TCP: Hash tables configured (established 2048 bind 2048) TCP reno registered UDP hash table entries: 64 (order: 0, 4096 bytes) UDP-Lite hash table entries: 64 (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) ï 2001-2006 Red Hat, Inc. ROMFS MTD (C) 2007 Red Hat, Inc. msgmni has been set to 116 alg: No test for stdrng (krng) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) Console: switching to colour frame buffer device 60x53 fb0: s3c2410fb frame buffer device s3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440 s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440 s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440 brd: module loaded at24 0-0050: 1024 byte 24c08 EEPROM (writable) 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 256MiB 3,3V 8-bit": 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 c486e300,c4872304 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 mice: 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 s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0 i2c /dev entries driver sched: RT throttling activated thanks, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
