In fs/proc/array.c (2.4.20-pre9, 2.4.19 and likely many other
versions) in function 'proc_pid_stat()' there is a code like that:
......
read_lock(&tasklist_lock);
ppid = task->pid ? task->p_opptr->pid : 0;
read_unlock(&tasklist_lock);
res = sprintf(buffer,"<long format string>",
task->pid,
......
ppid,
......
So assignment to ppid is locked but other reads from fiels of 'task'
structure are not guarded that way. Is this ok or if not we do not
particularly care? Function 'task_state()' in the same file seems
to be more careful about this.
Michal
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This archive was generated by hypermail 2b29 : Mon Oct 07 2002 - 22:01:00 EST