From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Sun, 8 Feb 2015 13:47:29 +1300 From: Michael Cree To: Mathieu Desnoyers Cc: Greg KH , linux-alpha@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , Matt Turner , Huang Ying , linux-kernel@vger.kernel.org, Paul McKenney , David Howells , Pranith Kumar , stable@vger.kernel.org Subject: Re: [PATCH] llist: Fix missing lockless_dereference() Message-ID: <20150208004729.GA10472@omega> References: <1423274934-10625-1-git-send-email-mathieu.desnoyers@efficios.com> <20150207221625.GB31119@kroah.com> <1117480383.90061.1423348244225.JavaMail.zimbra@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1117480383.90061.1423348244225.JavaMail.zimbra@efficios.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: On Sat, Feb 07, 2015 at 10:30:44PM +0000, Mathieu Desnoyers wrote: > > On Fri, Feb 06, 2015 at 09:08:21PM -0500, Mathieu Desnoyers wrote: > > > A lockless_dereference() appears to be missing in llist_del_first(). > > > It should only matter for Alpha in practice. What could one anticipate to be the symptoms of such a missing lockless_dereference()? The Alpha kernel is behaving pretty well provided one builds a machine specific kernel and UP. When running an SMP kernel some packages (most notably the java runtime, but there are a few others) occasionally lock up in a pthread call --- could be a problem in libc rather then the kernel. > > Meta-comment, do we really care about Alpha anymore? Is it still > > consered an "active" arch we support? There are a few of us still running recent kernels on Alpha. I am maintaining the unofficial Debian alpha port at debian-ports, and the Debian popcon shows about 10 installations of Debian Alpha. Cheers Michael.