From: Rusty Russell <rusty@rustcorp.com.au>
To: Kedar Sovani <kedars@gmail.com>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Unreliable Guide to Locking - Addition?
Date: Tue, 09 Aug 2005 12:35:06 +1000 [thread overview]
Message-ID: <1123554907.13481.20.camel@localhost.localdomain> (raw)
In-Reply-To: <5edf7fc905080806117df1ab32@mail.gmail.com>
On Mon, 2005-08-08 at 18:41 +0530, Kedar Sovani wrote:
> when the last atomic_dec_and_test() (the last == the one which
> returns 0) is being called on the object, the object is usually not
> accessible to others (list_del()) and hence the simultaneous
> atomic_inc() call never occurs.
Yes, a reference count must count references. Of course, you can get
around with with "atomic_dec_and_lock", but I hate that primitive as it
has scalability issues (it can't be translated to RCU).
I'll look and see if I can make this requirement explicit.
Thanks!
Rusty.
--
A bad analogy is like a leaky screwdriver -- Richard Braakman
prev parent reply other threads:[~2005-08-09 2:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-08 13:11 Unreliable Guide to Locking - Addition? Kedar Sovani
2005-08-09 2:35 ` Rusty Russell [this message]
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