On 5/2/07, Meher <mail2meher@xxxxxxxxx> wrote:
HI Pradeep, On 5/1/07, pradeep singh <2500.pradeep@xxxxxxxxx> wrote: > On 5/1/07, Meher <mail2meher@xxxxxxxxx> wrote: > > Hi, > > I am working on a MIPS32 based system with Linux 2.6.10 on it > > (yep.. it is old :( ). I am working on migrating to the new version. I > > have a written an ethernet driver for a custom ethenet chip and I am > > able to send and receive packets through the interface. When I set > > kernel to Auto IP config I can also see that kernel gets an IP address > > assigned. But after some time kernel crashes giving a message ".BUG: > > sleeping function called from invalid context events/0(4) at > > arch/mips/math-emu/dsemul.c". This problem does not appear when I am > > Can you please recheck if you are not holding any spinlocks.Also check > if you are not doing a memory allocation with spinlock held or in > interrupt context.May be you are doing something like printk which may > sleep IMO.Rechcek any methods you are calling which may sleep. > The only spin locks I am holding are the spin_lock_irqsave and spin_unlock_irqrestore when I enter and leave the ISR. Also the only memory allocation call I am making in my driver in interrupt context is the dev_alloc_skb() which I believe can be called from interrupt context(as it internally uses GFP_ATOMIC flag).
Can you post the code? That will be great to figure out the problem in a better way i guess. I am using printk's
but as per my understanding they should be safe.
Yes, they are safe. Sorry for the misunderstanding. Thanks ~psr Until I call
netif_rx(skb) in my interrupt handler I am making sure I am not making any kernel calls.. any pointers on how to know which call is making this crash if I am missing something... > HTH > Thanks > > ~psr > > not using the ethernet driver (disable ethernet interface). I looked > > at the RX/TX path and I am using Old API interface in the ethernet > > driver. I am not calling any functions that can sleep. > > Can anyone sugest me how to debug the problem? Please let me know if > > you need more information. > > > > This is the kernel log: > > > > Booting... > > > > Launching kernel decompressor. > > > > Starting GZIP Uncompression Algorithm. > > > > Kernel decompressor was successful ... launching kernel. > > > > > > > > LINUX started... > > > > Entering start_kernel > > Linux version 2.6.10_dev-malta-mips2_fp_len (meher@xxxxxxxxxxxxx) (gcc > > version 3.4.3 ) #271 Mon Apr 30 16:13:53 CDT 2007 > > CPU revision is: 00018448 > > Determined physical RAM map: > > memory: 14001000 @ 00000000 (reserved) > > memory: 0001f000 @ 14001000 (ROM data) > > memory: 00243000 @ 14020000 (reserved) > > memory: 01d9d000 @ 14263000 (usable) > > Built 1 zonelists > > Kernel command line: console=ttyS0,9600n81 root=/dev/mtdblock0 > > rootfstype=jffs2 rw > > Primary instruction cache 16kB, physically tagged, 4-way, linesize 16 bytes. > > Primary data cache 8kB, 4-way, linesize 16 bytes. > > Synthesized TLB refill handler (20 instructions). > > Synthesized TLB load handler fastpath (32 instructions). > > Synthesized TLB store handler fastpath (32 instructions). > > Synthesized TLB modify handler fastpath (31 instructions). > > PID hash table entries: 256 (order: 8, 4096 bytes) > > CPU frequency 187.50 MHz > > Using 93.750 MHz high precision timer. > > Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) > > Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) > > Freeing Bootloader reserved memory [0x0001f000 @ 0x14001000] > > Memory: 30080k/32768k available (1662k kernel code, 2644k reserved, > > 438k data, 112k init) > > Mount-cache hash table entries: 512 (order: 0, 4096 bytes) > > Checking for 'wait' instruction... available. > > spawn_desched_task(00000000) > > desched cpu_callback 3/00000000 > > ksoftirqd started up. > > softirq RT prio: 24. > > desched cpu_callback 2/00000000 > > desched thread 0 started up. > > NET: Registered protocol family 16 > > Can't analyze prologue code at 941bd670 > > EFS: 1.0a - http://aeschi.ch.eu.org/efs/ > > JFFS2 version 2.2. (C) 2001-2003 Red Hat, Inc. > > Generic RTC Driver v1.07 > > Serial: 8250/16550 driver $Revision: 1.90 $ 5 ports, IRQ sharing disabled > > ttyS0 at MMIO 0x0 (irq = 15) is a 16550A > > io scheduler noop registered > > loop: loaded (max 8 devices) > > Currently in Ceswitch_Probe > > Platform device register completed > > Driver register completed > > Alloc Netdev completed > > In ceswitch_dev_init > > Out ceswitch_dev_init > > In eswitch_dev_get_net_stats > > CESWITCH:Installed ceswitch > > elevator: using noop as default io scheduler > > avalanche flash device: 0x1000000 at 0x10000000. > > Primary flash device: Found 1 x16 devices at 0x0 in 16-bit bank > > Amd/Fujitsu Extended Query Table at 0x0040 > > Primary flash device: CFI does not contain boot bank location. Assuming top. > > number of CFI chips: 1 > > cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. > > Looking for mtd device :mtd0: > > flash_base and flash_end for mtd0 are: 90120000,90320000 > > Found a mtd0 image (0x120000), with size (0x200000). > > Creating 1 MTD partitions on "Primary flash device": > > 0x00120000-0x00320000 : "mtd0" > > Looking for mtd device :mtd1: > > flash_base and flash_end for mtd1 are: 90020000,90120000 > > Found a mtd1 image (0x20000), with size (0x100000). > > Creating 1 MTD partitions on "Primary flash device": > > 0x00020000-0x00120000 : "mtd1" > > Looking for mtd device :mtd2: > > flash_base and flash_end for mtd2 are: 90000000,90020000 > > Found a mtd2 image (0x0), with size (0x20000). > > Creating 1 MTD partitions on "Primary flash device": > > 0x00000000-0x00020000 : "mtd2" > > Number of partitions detected: 3 > > mice: PS/2 mouse device common for all mice > > NET: Registered protocol family 2 > > IP: routing cache hash table of 512 buckets, 4Kbytes > > TCP: Hash tables configured (established 2048 bind 4096) > > ********* In eswitch_open *********** > > Calling initPhyReset > > initPhyReset::Bringing DSP Out of Reset > > initPhyReset::Bringing ESWITCH Out of Reset > > initPhyReset::Reset the PHY > > DSP CLock PLL Value is 0x427e > > phyGetState[0]: link = 0, speed = 0, duplex = 0 > > phyGetState[1]: link = 0, speed = 0, duplex = 0 > > GIG PHYs detected, PHYID = 0x143bcb1 > > phyConfigurePort[0]: 0x00000100 > > Phy[0]: 0x00000100 > > phyConfigurePort[1]: 0x00000100 > > Phy[1]: 0x00000100 > > cesw0: Successfully installed IRQ: 41 > > eswitch_open::Checking for PhyStatechange for port : 0 > > phyState hasn't changed checking again for 1 th time > > LINKCHANGE: PHY[0]: Link= 0000 --> 0001 > > LINKCHANGE: PHY[0]: Speed= 0000 --> 0020 > > LINKCHANGE: PHY[0]: Duplex= 0000 --> 0001 > > PHY[0] changed calling pswitchPortCfgChange(0) > > phyGetState[0]: link = 1, speed = 32, duplex = 1 > > pswitch: MAC[0].speed = 100 > > pswitch: MAC[0].duplex = H > > > > Kalyan::eswitch_open::Checking for PhyStatechange for port : 1 > > phyState hasn't changed checking again for 1 th time > > Kalyan:: In eswitch_dev_get_net_stats > > Kalyan:: In eswitch_dev_get_net_stats > > Sending DHCP requests .In eswitch_dev_tx now.. calling pswitchSend > > In pswitchSend.. > > > > pswitchSend::It is broadcast packet: 255 > > > > In pswitchSend.. > > pswitchSend:: dest = 0xffffffffffff > > > > pswitchSend::It is broadcast packet: 255 > > > > OK > > IP-Config: Got DHCP answer from 0.0.0.0, my address is 10.XX.X.XXX > > IP-Config: Complete: > > device=cesw0, addr=10.13.8.116, mask=255.255.255.240, gw=10.XX.X.XXX, > > host=10.XX.X.XXX, domain=cisco.com, nis-domain=(none), > > bootserver=0.0.0.0, rootserver=0.0.0.0, rootpath= > > VFS: Mounted root (jffs2 filesystem). > > Freeing unused kernel memory: 112k freed > > Running /bin/sh > > Algorithmics/MIPS FPU Emulator v1.5 > > > > > > > > BusyBox v1.00 (2007.02.05-19:57+0000) Built-in shell (ash) > > > > Enter 'help' for a list of built-in commands. > > > > > > # ping > > > > BusyBox v1.00 (2007.02.05-19:57+0000) multi-call binary > > > > > > > > Usage: ping [OPTION]... host > > > > > > > > # BUG: sleeping function called from invalid context events/0(4) at > > arch/mips/math-emu/dsemul.c > > > > :140 > > in_atomic():1 [00000001], irqs_disabled():1 > > Call Trace: > > [<94043314>] __might_sleep+0x104/0x11c > > [<94043008>] do_dsemulret+0x58/0x160 > > [<94043970>] task_rq_lock+0x38/0x54 > > [<9402db70>] do_ade+0x20/0x380 > > [<94027760>] handle_adel_int+0x38/0x58 > > [<9407c980>] drain_array_locked+0x78/0xd4 > > [<9407c808>] free_block+0x8c/0x18c > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407c980>] drain_array_locked+0x78/0xd4 > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407dc10>] cache_reap+0xb4/0x320 > > [<941170d8>] flush_to_ldisc+0x0/0x1a0 > > [<941bc358>] schedule+0x58/0x158 > > [<9407db5c>] cache_reap+0x0/0x320 > > [<94060120>] worker_thread+0x254/0x384 > > [<941bba24>] __schedule+0x14c/0x980 > > [<940447e4>] default_wake_function+0x0/0x28 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<940668fc>] kthread+0x124/0x168 > > [<94028afc>] kernel_thread_helper+0x10/0x18 > > [<94028aec>] kernel_thread_helper+0x0/0x18 > > > > > > Unhandled kernel unaligned access in > > arch/mips/kernel/unaligned.c::emulate_load_store_insn, line 475 > > > > [#1]: > > Cpu 0 > > $ 0 : 00000000 1000fc00 9466d400 94266000 > > $ 4 : b43a0ba0 942d4320 ffffffff 00000001 > > $ 8 : 00000002 942fa1a4 00000000 942492b0 > > $12 : 00000000 fffffffb ffffffff 0000000a > > $16 : 942d4320 942bda60 942bda6c 00000000 > > $20 : 00000001 ffd80000 80000000 94250000 > > $24 : 00000000 9400de18 > > $28 : 94016000 94017e70 00200200 9407c980 > > Hi : 00000010 > > Lo : 00000004 > > epc : 9407c808 free_block+0x8c/0x18c Not tainted > > ra : 9407c980 drain_array_locked+0x78/0xd4 > > Status: 1000fc02 KERNEL EXL > > Cause : 30800010 > > BadVA : 00000003 > > PrId : 00018448 > > Modules linked in: > > Process events/0 (pid: 4, threadinfo=94016000, task=9401c8e0) > > Stack : 941efa5c 00000000 942ebbe0 942ebbe0 942bda7c 94246000 942d4310 00000001 > > 942d4320 942bdad0 942bd97c 94250000 00200200 00100100 94250000 9407c980 > > 1000fc00 94004f28 94246000 942ebbe0 942bd97c 942bda60 00000001 9407dc10 > > 941170d8 94004f10 94004f18 94004f20 94017ee8 941bc358 94253e24 94253e28 > > 1000fc01 00000000 9407db5c 94004f10 94004f18 94004f20 94004f28 94060120 > > ... > > Call Trace: > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407c980>] drain_array_locked+0x78/0xd4 > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407dc10>] cache_reap+0xb4/0x320 > > [<941170d8>] flush_to_ldisc+0x0/0x1a0 > > [<941bc358>] schedule+0x58/0x158 > > [<9407db5c>] cache_reap+0x0/0x320 > > [<94060120>] worker_thread+0x254/0x384 > > [<941bba24>] __schedule+0x14c/0x980 > > [<940447e4>] default_wake_function+0x0/0x28 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<940668fc>] kthread+0x124/0x168 > > [<94028afc>] kernel_thread_helper+0x10/0x18 > > [<94028aec>] kernel_thread_helper+0x0/0x18 > > > > > > > > > > Code: 00431021 00551021 8c46001c <8cc30004> 8cc20000 ac620000 > > ac430004 3c020010 34420100 > > note: events/0[4] exited with preempt_count 1 > > BUG: scheduling while atomic: events/0/0x00000001/4 > > caller is do_exit+0xbc8/0xf4c > > Call Trace: > > [<9404d208>] do_exit+0xbc8/0xf4c > > [<941bbfcc>] __schedule+0x6f4/0x980 > > [<941bbfc4>] __schedule+0x6ec/0x980 > > [<9404d208>] do_exit+0xbc8/0xf4c > > [<9402ce78>] __die_if_kernel+0x0/0x90 > > [<9402ceec>] __die_if_kernel+0x74/0x90 > > [<9402ced0>] __die_if_kernel+0x58/0x90 > > [<940621dc>] search_exception_tables+0x4c/0x5c > > [<940311f4>] fixup_exception+0x24/0x60 > > [<9407c808>] free_block+0x8c/0x18c > > [<9402dea8>] do_ade+0x358/0x380 > > [<9402de7c>] do_ade+0x32c/0x380 > > [<94027760>] handle_adel_int+0x38/0x58 > > [<9407c980>] drain_array_locked+0x78/0xd4 > > [<9407c808>] free_block+0x8c/0x18c > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407c980>] drain_array_locked+0x78/0xd4 > > [<94246000>] ip_auto_config+0xa54/0x1184 > > [<9407dc10>] cache_reap+0xb4/0x320 > > [<941170d8>] flush_to_ldisc+0x0/0x1a0 > > [<941bc358>] schedule+0x58/0x158 > > [<9407db5c>] cache_reap+0x0/0x320 > > [<94060120>] worker_thread+0x254/0x384 > > [<941bba24>] __schedule+0x14c/0x980 > > [<940447e4>] default_wake_function+0x0/0x28 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<9405fecc>] worker_thread+0x0/0x384 > > [<940668fc>] kthread+0x124/0x168 > > [<94028afc>] kernel_thread_helper+0x10/0x18 > > [<94028aec>] kernel_thread_helper+0x0/0x18 > > > > > > -- > > Regards, > > Meher > > > > -- > > To unsubscribe from this list: send an email with > > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > > Please read the FAQ at http://kernelnewbies.org/FAQ > > > > > > > -- > play the game > -- Regards, Meher
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