From: "Jan Beulich" <JBeulich@suse.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Kevin Tian <kevin.tian@intel.com>,
xen-devel@lists.xen.org, Jun Nakajima <jun.nakajima@intel.com>,
Haozhong Zhang <haozhong.zhang@intel.com>
Subject: Re: [PATCH] Revert "x86/hvm: add support for pcommit instruction"
Date: Mon, 06 Jun 2016 04:37:56 -0600 [thread overview]
Message-ID: <57556EA402000078000F1F2F@prv-mh.provo.novell.com> (raw)
In-Reply-To: <20160606103103.GU14588@citrix.com>
>>> On 06.06.16 at 12:31, <wei.liu2@citrix.com> wrote:
> On Mon, Jun 06, 2016 at 02:54:47AM -0600, Jan Beulich wrote:
>> >>> On 06.06.16 at 07:56, <haozhong.zhang@intel.com> wrote:
>> > This reverts commit cfacce340608be5f94ce0c8f424487b63c3d5399.
>> >
>> > Platforms supporting Intel NVDIMM are now required to provide
>> > persistency once pmem stores are accepted by the memory subsystem.
>> > This is usually achieved by a platform-level feature known as ADR
>> > (Asynchronous DRAM Refresh) that flushes any memory subsystem write
>> > pending queues on power loss/shutdown. Therefore, the pcommit
>> > instruction, which has not yet shipped on any product (and will not),
>> > is no longer needed and is deprecated.
>> >
>> > Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
>>
>> Acked-by: Jan Beulich <jbeulich@suse.com>
>>
>> Wei - certainly something to consider for 4.7.
>>
>
> Sure. No point in shipping feature that won't show up in hardware.
>
> Release-acked-by: Wei Liu <wei.liu2@citrix.com>
>
> But please wait a bit before committing while we try to sort out RC5 and
> branching etc.
Sure. Got to wait for a VMX maintainer ack anyway.
Jan
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next prev parent reply other threads:[~2016-06-06 10:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-06 5:56 [PATCH] Revert "x86/hvm: add support for pcommit instruction" Haozhong Zhang
2016-06-06 8:54 ` Jan Beulich
2016-06-06 10:31 ` Wei Liu
2016-06-06 10:37 ` Jan Beulich [this message]
2016-06-07 0:55 ` Tian, Kevin
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