我了解到linux内核管理内存,分配/释放内存的单位是4KB,这是页面大小。我知道这个页面是由struct page处理的。我这里有一个实际的代码。
struct page {
unsigned long flags; /* Atomic flags, some possibly
* updated asynchronously */
/*
* Five words (20/40 bytes) are available in this union.
* WARNING: bit 0 of the fi
我最近开始浏览memcached的源代码,我偶然发现了这个结构。根据我的理解,大约有64个块,每个块代表一个独特的块大小。如果我们使用第一个slab类(假设大小为80 ),那么属于该slab的页面的内存将被分解为80个字节。 typedef struct {
unsigned int size; // sizes of items
unsigned int perslab; // how many items per slab
void *slots; // list of item ptrs
unsigned int sl_curr;
我正在尝试为Android应用程序调试本机C代码,其中我获得了以下分段错误:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1640]
0x8463022c in new_field_info (tree=0x7c1a98, hfinfo=0x865b6344, tvb=0xa65100, start=8, item_length=2) at proto.c:3491
3491 proto.c: No such file or directory.
in proto.c
我目前使用17.10,当提示升级时,我点击升级,输入密码认证,什么也没有发生。
试过几次,重新启动等,仍然没有升级。
没有新更新的sudo apt-get update的输出。下面是sudo apt-get upgrade的输出。
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are