Re: module

[John L. <mo...@co...>]

On Thu, Oct 25, 2001 at 02:58:21AM +0200, Andi Kleen wrote:

> On Thu, Oct 25, 2001 at 02:35:42AM +0200, Philippe Elie wrote:
> > An idea why lsmod can return
> > 
> > oprofile (deleted)
> > 
> > and I can not unload/relod the module ?
> 
> It has an usage count of -1.
> That's the usual way to make sure an module cannot be unloaded when 
> it is unsafe to do so.

if it stays like this more than a second after op_stop, we have a bug
(assuming an oprofiled process hasn't hung in a read, which aj may have
seen)

check oprofile.c:can_unload() - note the owner: THIS_MODULE ups the count
during a ->read()

regards
john

-- 
"If the software that a company produces isn't reliable, adding a bunch of
'Mother, may I' rules to the language and the code won't fix it."
	- Pete Becker