From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [Pv-ops][PATCH 0/4 v2] Netback multiple threads support
Date: Mon, 3 May 2010 12:02:28 -0400
Message-ID: <20100503160228.GA31299@phenom.dumpdata.com>
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To: "Xu, Dongxiao" <dongxiao.xu@intel.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Steven Smith <steven.smith@citrix.com>
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> when we test this patch, we found that the domain_lock in grant table
> operation (gnttab_copy()) becomes a bottle neck. We temporarily
> remove the global domain_lock to achieve good performance.

Without that change (global domain_lock in place), what are the
performance numbers?

Is there a forthcoming patch to make the gnttab_copy have a much finer
grained lock?