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Date: Sat, 23 Nov 2002 23:23:34 +0100
From: Pavel Machek <pavel@ucw.cz>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-kernel@vger.kernel.org, Doug Ledford <dledford@redhat.com>,
       Alexander Viro <viro@math.psu.edu>
Subject: Re: Module Refcount & Stuff mini-FAQ
Message-ID: <20021123222334.GB5170@elf.ucw.cz>
References: <20021118230821.8F3822C241@lists.samba.org>
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Hi!

> Q: How does the module remove code work?
> A: It stops the machine by scheduling threads for every other CPU,
>    then they all disable interrupts.  At this stage we know that noone
>    is in try_module_get(), so we can reliably read the counter.  If
>    zero, or the rmmod user specified --wait, we set the live flag to
>    false.  After this, the reference count should not increase, and
>    each module_put() will wake us up, so we can check the counter
>    again.

Where is this implemented? I guess I need this for swsusp...

								Pavel
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