flags 含义 MS_ASYNC 调用一个写操作并返回 MS_INVALIDATE 映像到相同文件的内存映像数据更新 MS_SYNC 完成写操作后函数返回 1. 2. 3. 4. 5. 6. 7. 通过/dev/mem设备文件和mmap系统调用,可以将线性地址描述的物理内存映射到进程的地址空间,然后就可以直接访问这段内存了。 二、应用实例: 1.
__init my_start_kernel(void)是一个主函数,系统入口。先初始化了一个PCB,即task[0],然后用for循环,用memcpy()系统函数复制PCB,再修改一些信息,初始化整个PCB数组。 memcpy函数的功能是从源src所指的内存地址的起始位置开始拷贝n个字节到目标dest所指的内存地址的起始位置中。task[pid].task_entry = task[pid]...
使用async_schedule调用module的probe函数,对于那些需要较多msleep的模块,这个方法可以通过并行提高init速度,但是一些模块对初始化顺序是有依赖的,所以慎用。 4. 优化设备IO驱动,提高数据的读写速度,kernel启动完成到android launcher完成,几乎无处不涉及到文件的读写,IO速度对启动时间的影响重大,代码是人写的,所以平台特...
replace memcpy() with memmove() due to the overlaping buffers.(CVE-2024-35823) In the Linux kernel, the following vulnerability has been resolved: geneve: fix header validation in geneve[6]_xmit_skb syzbot is able to trigger an uninit-value in geneve_xmit() [1] Problem : While most ip...
Additionally, there is a set of asynchronous (i.e., non-blocking) CUDA memory functions (all having the Async suffix) that accept an additional stream parameter so that they can be queued in a particular sequence. For example: // Same as cudaMemcpy, with the addition of the cudaStream_t...
x_tables autofs4 dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid0 multipath linear hid_generic usbhid h id cdc_ether usbnet mii ast i2c_algo_bit drm_shmem_helper
(async_memcpy.ko) kmod(async_pq.ko) kmod(async_raid6_recov.ko) kmod(async_tx.ko) kmod(async_xor.ko) kmod(at24.ko) kmod(at803x.ko) kmod(at86rf230.ko) kmod(ata_generic.ko) kmod(ata_piix.ko) kmod(atbm8830.ko) kmod(ath.ko) kmod(ath10k_core.ko) kmod(ath10k_pci.ko) kmod(...
invalid opcode: 0000 [#1] SMP last sysfs file: /sys/kernel/dlm/emslv/event_done CPU 0 Modules linked in: ext2 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 linear vfat msdos fat autofs4 gfs2 sunrpc dlm configfs ipv6 uinput ppdev ...
memcpy(paramBuffer + paramBufferSize, \ &(value), sizeof(value)); \ paramBufferSize += sizeof(value); \ } while (0) int i; ADD_TO_PARAM_BUFFER(i, __alignof(i)); float4 f4; ADD_TO_PARAM_BUFFER(f4, 16); // float4's alignment is 16 ...
kvm_guest_init if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF)) x86_init.irqs.trap_init = kvm_apf_trap_init; static void __init kvm_apf_trap_init(void) { set_intr_gate(14, async_page_fault); } static void kvm_guest_cpu_init(void) { if (!kvm_para_available()) return; if (...