Hi Greg & Christoph, > Subject: Re: [PATCH V3 2/4] misc: vop: do not allocate and reassign the used > ring > > On Thu, Oct 22, 2020 at 01:06:36PM +0800, Sherry Sun wrote: > > We don't need to allocate and reassign the used ring here and remove > > the used_address_updated flag.Since RC has allocated the entire vring, > > including the used ring. Simply add the corresponding offset can get > > the used ring address. > > Someone needs to verify this vs the existing intel implementations.
Hi Greg, @gre...@linuxfoundation.org, sorry I don't have the Intel MIC devices so cannot test it, do you know anyone who can help test this patch changes on the Intel MIC platform? Thanks. > > > - used = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, > > - get_order(vdev->used_size[index])); > > + used = va + PAGE_ALIGN(sizeof(struct vring_desc) * > > +le16_to_cpu(config.num) + > > This adds an over 80 char line. Hi Christoph, will fix it in V4, thanks. > > > + vdev->used[index] = config.address + PAGE_ALIGN(sizeof(struct > > +vring_desc) * le16_to_cpu(config.num) + > > Again. Best regards Sherry
