search for: xenfeat_highmem_assist

...n.c 2008-10-27 11:56:39.000000000 +0100 +++ head-2008-10-24/arch/i386/mm/highmem-xen.c 2008-10-27 11:56:59.000000000 +0100 @@ -151,9 +151,56 @@ struct page *kmap_atomic_to_page(void *p return pte_page(*pte); } +void clear_highpage(struct page *page) +{ + void *kaddr; + + if (likely(xen_feature(XENFEAT_highmem_assist)) + && PageHighMem(page)) { + struct mmuext_op meo; + + meo.cmd = MMUEXT_CLEAR_PAGE; + meo.arg1.mfn = pfn_to_mfn(page_to_pfn(page)); + if (HYPERVISOR_mmuext_op(&meo, 1, NULL, DOMID_SELF) == 0) + return; + } + + kaddr = kmap_atomic(page, KM_USER0); + clear_page(kaddr); + kunmap...

This patch series is a reworking of a series developed by Mukesh Rathor at Oracle. The entirety of the design and development was done by him; I have only reworked, reorganized, and simplified things in a way that I think makes more sense. The vast majority of the credit for this effort therefore goes to him. This version is labelled v13 because it is based on his most recent series, v11.