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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

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.

Wei.

> Jan
> 

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