[PATCH 2/4] nvme-pci: use appropriate initial chunk size for HMB allocation

[Keith Busch]

On Wed, Sep 06, 2017 at 03:55:30PM +0200, Christoph Hellwig wrote:
> From: Akinobu Mita <akinobu.mita at gmail.com>
> 
> The initial chunk size for host memory buffer allocation is currently
> PAGE_SIZE << MAX_ORDER.  MAX_ORDER order allocation is usually failed
> without CONFIG_DMA_CMA.  So the HMB allocation is retried with chunk size
> PAGE_SIZE << (MAX_ORDER - 1) in general, but there is no problem if the
> retry allocation works correctly.
> 
> Signed-off-by: Akinobu Mita <akinobu.mita at gmail.com>
> [hch: rebased]
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> Cc: stable at vger.kernel.org
> ---

Looks good.

Reviewed-by: Keith Busch <keith.busch at intel.com>