Re: [RFC v2 09/11] HID: hyperv: Make ringbuffer at least take two pages

2020-09-02 Thread Jiri Kosina
On Wed, 2 Sep 2020, Boqun Feng wrote: > When PAGE_SIZE > HV_HYP_PAGE_SIZE, we need the ringbuffer size to be at > least 2 * PAGE_SIZE: one page for the header and at least one page of > the data part (because of the alignment requirement for double mapping). > > So make sure the ringbuffer sizes

[RFC v2 09/11] HID: hyperv: Make ringbuffer at least take two pages

2020-09-01 Thread Boqun Feng
When PAGE_SIZE > HV_HYP_PAGE_SIZE, we need the ringbuffer size to be at least 2 * PAGE_SIZE: one page for the header and at least one page of the data part (because of the alignment requirement for double mapping). So make sure the ringbuffer sizes to be at least 2 * PAGE_SIZE when using vmbus_ope