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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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.

Jan


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