From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@qumranet.com>
Subject: [ofa-general] Re: [PATCH 08 of 11] anon-vma-rwsem
Date: Thu, 15 May 2008 14:12:34 +0300
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Cc: linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>,
	Nick Piggin <npiggin@suse.de>, kvm-devel@lists.sourceforge.net,
	Roland Dreier <rdreier@cisco.com>, Eric Dumazet <dada1@cosmosbay.com>,
	general@lists.openfabrics.org, Christoph Lameter <clameter@sgi.com>,
	Nick Piggin <nickpiggin@yahoo.com.au>, Jack Steiner <steiner@sgi.com>,
	Andrea Arcangeli <andrea@qumranet.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Rusty Russell <rusty@rustcorp.com.au>, Chris Wright <chrisw@redhat.com>,
	Anthony Liguori <aliguori@us.ibm.com>, Marcelo Tosatti <marcelo@kvack.org>,
	Kanoj Sarcar <kanojsarcar@yahoo.com>, linux-kernel@vger.kernel.org,
	"Paul E. McKenney" <paulmck@us.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
To: Robin Holt <holt@sgi.com>
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Robin Holt wrote:
> Then we need to deposit the information needed to do the invalidate.
>
> Lastly, we would need to interrupt.  Unfortunately, here we have a
> thundering herd.  There could be up to 16256 processors interrupting the
> same processor.  That will be a lot of work.  It will need to look up the
> mm (without grabbing any sleeping locks in either xpmem or the kernel)
> and do the tlb invalidates.
>
>   

You don't need to interrupt every time.  Place your data in a queue (you 
do support rmw operations, right?) and interrupt.  Invalidates from 
other processors will see that the queue hasn't been processed yet and 
skip the interrupt.

-- 
error compiling committee.c: too many arguments to function