linux-device-driver
How reliable is current_kernel_time()?
I am working on performance benchmarking of a SDIO UART Linux/Android 开发者_开发百科driver and used current_kernel_time() at start and end of the to-be-analysed read, write function implementation, t[详细]
2023-02-03 06:21 分类:问答How to generate ~100kHz clock signal in Liunx kernel module with bit-banging?
I\'m trying to generate clock signal on GPIO pin (ARM platform, mach-davinci, kernel 2.6.27) which will have something arroung 100kHz. Using tasklet with high priority to do that. Theory is simple, se[详细]
2023-02-03 00:02 分类:问答How could I force minor number allocation for SAN on linux?
I\'ve got a cluster both attached to a SAN (using multipath on linux), using RAW devices for ORACLE. When each box boot they pick开发者_JS百科 up differant minor number (I guess it\'s first come firs[详细]
2023-02-02 20:07 分类:问答Compiling a program for user mode Linux
I\'ve just implemented a \"pseudo\" device driver and want to test it. What can I do as a test is just:[详细]
2023-02-01 10:19 分类:问答Do Kernel pages get swapped out?
Pertaining to the Linux kernel, do \"Kernel\" pages ever get swapped out ? Also, do User space pages ever get开发者_StackOverflow社区 to reside in ZONE_NORMAL ?No, kernel memory is unswappable.[详细]
2023-02-01 01:17 分类:问答failing on rmmod
I\'m failing rmmod lcd_module.ko ERROR: Removing \'lcd_module\': Device or resource busy lssmod give me result:[详细]
2023-01-31 11:35 分类:问答LKMG chardev.c question about register_chrdev function
In register_chrdev function we have to give the device name. Even though we create a device with another name with same major number it works correctly. So what is the significance开发者_JS百科 of giv[详细]
2023-01-31 11:24 分类:问答Redirect content of /dev/ttySDIO0 to a file
Is there any way to redirect the content of a tty device (/dev/ttySDIO0) file so that its content can be manage开发者_运维问答d using a file IO operations. I don\'t prefer to use \'cat\' here.[详细]
2023-01-31 09:06 分类:问答omap3 gpmc config in linux
Is it possible to change configuration of a OMAP3 gpmc after boot-up on linux?I 开发者_JAVA技巧am writing a driver for a device that use the OMAP3 gpmc bus.We would prefer to be able to load the drive[详细]
2023-01-30 22:48 分类:问答when the io request was removed from io queue?
Linux RH5.4 OS, ext3 file system In time T1, when i read/write a file, a i/o request will be send to OS(disk?) working queue, suppose the disk spend 10 ms to serve this request, now the time is T2=开发[详细]
2023-01-30 22:31 分类:问答