From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>,
Kevin Tian <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>,
Eddie Dong <eddie.dong@intel.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
tim@xen.org, xen-devel@lists.xen.org,
Kai Huang <kai.huang@linux.intel.com>,
Ross Lagerwall <ross.lagerwall@citrix.com>,
Jan Beulich <jbeulich@suse.com>
Subject: Re: [PATCH for-4.6] p2m/ept: Set the A bit only if PML is enabled
Date: Wed, 23 Sep 2015 11:28:33 -0400 [thread overview]
Message-ID: <20150923152832.GA3441@konrad-lan.dumpdata.com> (raw)
In-Reply-To: <20150923151846.GA9208@zion.uk.xensource.com>
On Wed, Sep 23, 2015 at 04:18:46PM +0100, Wei Liu wrote:
> With the discussion still not finalised I'm a bit worried that this
> issue will block the release.
>
> I think we have a few options here. I will list them in order of my
> preference. Please correct me if I'm talking non-sense, and feel free to
> add more options if I miss anything.
>
> 1. Disable PML on broken chips, gate access to A bit (or AD) with PML.
>
> In the sub-thread I had with Ross, the proposed patch already does that.
> There is no need to "disable PML in broken chips" because that feature
> is not supported by broken chips in the first place.
>
> The downside is that the overhead of gating with `if' statement which
> makes things a tad slower for everyone. But that's not really reason to
> reject this patch because any gating method would involve similar
> overhead.
One could use alternative assembler for this.
next prev parent reply other threads:[~2015-09-23 15:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-16 8:47 [PATCH for-4.6] p2m/ept: Set the A bit only if PML is enabled Ross Lagerwall
2015-09-16 14:46 ` Wei Liu
2015-09-16 15:17 ` Ross Lagerwall
2015-09-16 15:23 ` Wei Liu
2015-09-16 19:47 ` Andrew Cooper
2015-09-21 12:30 ` Jan Beulich
2015-09-21 14:33 ` Tim Deegan
2015-09-23 15:18 ` Wei Liu
2015-09-23 15:28 ` Konrad Rzeszutek Wilk [this message]
2015-09-23 15:43 ` George Dunlap
2015-09-23 15:46 ` Tim Deegan
2015-09-24 7:02 ` Jan Beulich
2015-09-24 9:10 ` Tim Deegan
2015-09-24 9:13 ` Andrew Cooper
2015-09-24 9:20 ` Tim Deegan
2015-09-24 9:41 ` Jan Beulich
2015-09-24 9:33 ` Jan Beulich
2015-09-24 10:45 ` Wei Liu
2015-09-24 10:49 ` Wei Liu
2015-09-28 8:42 ` Kai Huang
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