On Tue, Apr 26, 2005 at 10:43:36AM +0400, Evgeniy Polyakov wrote:
> On Mon, 2005-04-25 at 15:22 -0500, Dmitry Torokhov wrote:
> > On 4/25/05, Evgeniy Polyakov <[email protected]> wrote:
> > > While thinking about locking schema
> > > with respect to sysfs files I recalled,
> > > why I implemented such a logic -
> > > now one can _always_ remove _any_ module
> > > [corresponding object is removed from accessible
> > > pathes and waits untill all exsting users are gone],
> > > which is very good - I really like it in networking model,
> > > while with whole device driver model
> > > if we will read device's file very quickly
> > > in several threads we may end up not unloading it at all.
> >
> > I am sorrry, that is complete bull*. sysfs also allows removing
> > modules at an arbitrary time (and usually without annoying "waiting
> > for refcount" at that)... You just seem to not understand how driver
> > code works, thus the need of inventing your own schema.
>
> Ok, let's try again - now with explanation,
> since it looks like you did not even try to understand what I said.
> If you will remove objects from ->remove() callback
> you may end up with rmmod being stuck.
Yes, and that is acceptable. networking implemented their own locking
method to allow unloading of their drivers in such a manner. No other
subsystem is going to do that kind of implementation, so Dmitry is
correct here.
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]