Re: [Xen-devel] [PATCH] Revert "x86/hvm: add support for pcommit instruction"

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 06.06.16 at 12:31, <wei.liu2@xxxxxxxxxx> wrote:
> On Mon, Jun 06, 2016 at 02:54:47AM -0600, Jan Beulich wrote:
>> >>> On 06.06.16 at 07:56, <haozhong.zhang@xxxxxxxxx> 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@xxxxxxxxx>
>> 
>> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
>> 
>> 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@xxxxxxxxxx>
> 
> 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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