Messages in this thread | | | From | mingz <> | Subject | defunc thread? | Date | Tue, 15 Jul 2003 09:54:42 -0400 |
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I code a smal example about kernel thread. But when I insmod thrtest.o & more /proc/testthread ps aux
then i can see my thread become defunc. if i insmod (and wait till it return, ) more /proc/testthread, ps aux,
the thread status is correct. can anybody tell me why? thx
ming --------------------------------------------------------------------------------- #include <linux/errno.h> /* Miscellaneous error codes */ #include <linux/stddef.h> /* NULL */ #include <linux/slab.h> /* kmalloc() */ #include <linux/module.h> /* EXPORT_SYMBOL */ #include <linux/pci.h> #include <linux/smp_lock.h> #include <linux/proc_fs.h> #include <asm/uaccess.h> #include <linux/interrupt.h>
DECLARE_WAIT_QUEUE_HEAD(test_wait);
int t_thread(void *startup) { int i = 0; lock_kernel(); daemonize(); current->tty = NULL; strcpy(current->comm, "testthread"); unlock_kernel();
spin_lock_irq(¤t->sigmask_lock); sigfillset(¤t->blocked); recalc_sigpending(current); spin_unlock_irq(¤t->sigmask_lock);
complete((struct completion *)startup);
printk("test thread up and call complete\n"); interruptible_sleep_on(&test_wait); printk("thread wake up %d times\n", ++i);
printk("test thread do cleanup work\n");
return 0; }
int test_read_procmem(char *buf, char **start, off_t offset, int count, int *eof, void *data) { int len = 0;
len += sprintf(buf+len,"test v0.1 Dragonfly, ELE, URI\n"); *eof = 1;
wake_up_interruptible(&test_wait); return len; }
static struct completion startup = COMPLETION_INITIALIZER(startup);
int test_init(void) { kernel_thread(t_thread, &startup, CLONE_FS | CLONE_FILES | CLONE_SIGNAL); wait_for_completion(&startup);
create_proc_read_entry("testthread", 0, NULL, test_read_procmem, NULL); set_current_state (TASK_INTERRUPTIBLE); schedule_timeout (30*HZ); __set_current_state (TASK_RUNNING);
return 0; }
void test_clean(void) { remove_proc_entry("helpm", NULL); }
module_init(test_init); module_exit(test_clean);
MODULE_DESCRIPTION("Test Thread"); MODULE_LICENSE("GPL");
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