进程控制块（一）
作者 佚名技术
来源 Linux系统
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发布时间 2012-04-09
| ,详细见下 unsigned short used_math; char comm[16]; /* file system info */ int link_count, total_link_count; struct tty_struct *tty; /* NULL if no tty */ unsigned int locks; /* How many file locks are being held */ /* ipc stuff */ struct sem_undo *semundo; struct sem_queue *semsleeping; /* CPU-specific state of this task */ struct thread_struct thread; /* filesystem information */ struct fs_struct *fs; /* open file information */ struct files_struct *files; /* namespace */ struct namespace *namespace; /* signal handlers */ spinlock_t sigmask_lock; /* Protects signal and blocked */
PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, PER_BSD = 0x0006, PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, PER_LINUX32 = 0x0008, PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ PER_RISCOS = 0x000c, PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, PER_HPUX = 0x000f, PER_OSF4 = 0x0010, /* OSF/1 v4 */ PER_MASK = 0x00ff, }; //进程资源的限制,对应task_struct中的struct rlimit rlim[RLIM_NLIMITS],RLIM_NLIMITS的值是11,代表11项资源,分别是 #define RLIMIT_CPU 0 /* CPU time in ms */ #define RLIMIT_FSIZE 1 /* Maximum filesize */ #define RLIMIT_DATA 2 /* max data size */ #define RLIMIT_STACK 3 /* max stack size */ #define RLIMIT_CORE 4 /* max core file size */ #define RLIMIT_RSS 5 /* max resident set size */ #define RLIMIT_NPROC 6 /* max number of processes */ #define RLIMIT_NOFILE 7 /* max number of open files */ #define RLIMIT_MEMLOCK 8 /* max locked-in-memory address space */ #define RLIMIT_AS 9 /* address space limit */ #define RLIMIT_LOCKS 10 /* maximum file locks held */ 本文出自 “只是博客而已” 博客,请务必保留此出处http://forrestcao.blog.51cto.com/2186939/396374
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