> OK, I did the following, which is what I think you wanted, plus Zwane's
> observation that task_state acquires the task_struct lock (we're the only
> caller, so I just removed it), but I still get the same panic and this time
> the box hung. No doubt I've just done something stupid in the patch ...
> (task_state takes the tasklist_lock ... is that safe to do inside task_lock?)
It looks like you now try and take the tasklist_lock inside a task_lock()
region, but task_lock says no-can-do:
/* Protects ->fs, ->files, ->mm, and synchronises with wait4(). Nests
* inside tasklist_lock */
static inline void task_lock(struct task_struct *p)
{
...
Anton
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This archive was generated by hypermail 2b29 : Sun Feb 23 2003 - 22:00:15 EST