1、InitDevices()函数 接下来分析第一个重点函数,InitDevices函数,这个函数主要做的一件事情就是找到super物理分区的节点,以及完成这个分区的节点映射,在dev/block下面生成super分区的节点出来。 bool FirstStageMount::InitDevices() { std::set<std::string> devices; GetSuperDeviceName(&devices); if (!GetDmVe...
二、程序分析 1intdevices_init (void)2{3#ifndef CONFIG_ARM/*already relocated for current ARM implementation*/4ulongrelocation_offset = gd->reloc_off;5inti;67/*relocate device name pointers*/8for(i =0; i < (sizeof(stdio_names) /sizeof(char*)); ++i) {9stdio_names[i] = (char*) ...
# will vary across devicesinunpredictable waysifallowed to scalewith# cpu cores.write/proc/sys/kernel/sched_tunable_scaling0write/proc/sys/kernel/sched_latency_ns10000000write/proc/sys/kernel/sched_wakeup_granularity_ns2000000write/proc/sys/kernel/sched_compat_yield1write/proc/sys/kernel/sched_child...
devices 子系统,可以控制进程能够访问某些设备。 net_cls 子系统,可以标记 cgroups 中进程的网络数据包,然后可以使用 tc 模块(traffic control)对数据包进行控制。 net_prio — 这个子系统用来设计网络流量的优先级 freezer 子系统,可以挂起或者恢复 cgroups 中的进程。 ns 子系统,可以使不同 cgroups 下面的进程使用...
force_config_drive:会在虚拟机的xml文件中生成一个disk设备,并把元数据配置文件保存到此设备中:<devices>...<disk type='network'device='cdrom'><driver name='qemu'type='raw'cache='writeback'discard='unmap'/><host name='192.168.10.221'port='6789'/><host name='192.168.10.222'port='6789'/><...
fsck services...) devices...) devices...) (various low-level (various low-level | | | services: udevd, API VFS mounts: v v v tmpfiles, random mqueue, configfs, local-fs.target swap.target cryptsetup.target seed, sysctl, ...) debugfs, ...) ...
snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES, e->d_name); if (pci_scan_one(dirname, domain, bus, devid, function) < 0) goto error; } closedir(dir); return 0; error: closedir(dir); return -1; } 这样,扫描并记录了系统中所有的pci设备的相关信息,后面根据上面获取...
In some cases it is also observed that underlying devices used for swap filesystem are not deleted from system, but are having large number of IO errors, due to which the read IO on swap filesystem fails and results in the same panic as described here. In such case it would be recommen...
执行devices_init()函数后,在/sys下创建devices节点后形成的数据关系如下: 创建/dev节点后形成的数据关系如下: 在/dev/下创建block节点后形成的数据关系如下: 在/dev/下创建char节点后形成的数据关系如下: 执行bus_init后形成的数据关系如下: |---buses_init() //在/sys下创建bus以及system节点 ...
Tweaked: /sys/devices/system/cpu/cpu1/online = 1 Original: /proc/sys/vm/oom_kill_allocating_task = 0Tweaked: /proc/sys/vm/oom_kill_allocating_task = 0 Original: /proc/sys/vm/panic_on_oom = 0Tweaked: /proc/sys/vm/panic_on_oom = 0 Original: /proc/sys/vm/laptop_mode = 0Tweaked...