Hi, I am working with - KS8851 SPI based ethernet controller (drivers/net/ks8851.c) - my filesystem is over nfs - using common nfs bootargs (nolock,tcp,rsize=8092,wsize=8092) - kernel version is 2.6.33-rc2 While doing some tests using dd (20 instances of it) creating a 10 MB file each, # dd if=/dev/urandom of=/file.temp.00 bs=1M count=10 & # dd if=/dev/urandom of=/file.temp.01 bs=1M count=10 & ... I got the following crash, INFO: task dd:516 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. dd D c0284154 0 516 495 0x00000000 Backtrace: [<c0283a9c>] (schedule+0x0/0x7c0) [<c0284a28>] (__mutex_lock_slowpath+0x0/0x1e4) [<c0284c0c>] (mutex_lock+0x0/0x3c) [<c0085b7c>] (generic_file_aio_write+0x0/0xd4) [<c0134d30>] (nfs_file_write+0x0/0x1b8) [<c00b0d5c>] (do_sync_write+0x0/0xe8) [<c00b17fc>] (vfs_write+0x0/0x164) [<c00b19e0>] (sys_write+0x0/0x70) [<c002d140>] (ret_fast_syscall+0x0/0x2c) I have repeated same tests several times but not seen frequently, any idea to debug will be highly appreciated. Best Regards Abraham -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
