Linux kernel 理解dmesg消息
我是一个学习如何为USB设备编写Linux设备驱动程序的新手。我想了解dmesg输出Linux kernel 理解dmesg消息,linux-kernel,linux-device-driver,Linux Kernel,Linux Device Driver,我是一个学习如何为USB设备编写Linux设备驱动程序的新手。我想了解dmesg输出 [ 6870.420077] usb 2-5: new low-speed USB device number 43 using ohci_hcd [ 6870.500057] hub 2-0:1.0: unable to enumerate USB device on port 5 [ 6871.444057] usb 2-5: new low-speed USB device number 44 using
[ 6870.420077] usb 2-5: new low-speed USB device number 43 using ohci_hcd
[ 6870.500057] hub 2-0:1.0: unable to enumerate USB device on port 5
[ 6871.444057] usb 2-5: new low-speed USB device number 44 using ohci_hcd
[ 6871.524065] hub 2-0:1.0: unable to enumerate USB device on port 5
[ 6872.468089] usb 2-5: new low-speed USB device number 45 using ohci_hcd
[ 6872.548065] hub 2-0:1.0: unable to enumerate USB device on port 5
你能告诉我一些解释如何破译这些内核消息的阅读材料吗?dmesg-打印或控制内核环缓冲区 当发出
dmesg
命令时,将打印内核环缓冲区消息。我想没有具体的格式
大多数情况下,每当编写新的驱动程序(或内核代码)时,首先打印特定的模块名,并打印相应的消息以区分我们的消息
比如说,
printk(内核警报“JayModule:Module加载成功…”)代码>
将在内核环形缓冲区中打印JayModule:Module已成功加载..
我猜[]内给出的数值是时间