On Tue, Mar 26, 2013 at 05:31:51PM +0530, Aneesh Kumar K.V wrote: > Naoya Horiguchi <[email protected]> writes: > > > +/* Returns true for head pages of in-use hugepages, otherwise returns > > false. */ > > +bool is_hugepage_movable(struct page *hpage) > > +{ > > + struct page *page; > > + struct hstate *h; > > + bool ret = false; > > + > > + VM_BUG_ON(!PageHuge(hpage)); > > + /* > > + * This function can be called for a tail page because memory hotplug > > + * scans movability of pages by pfn range of a memory block. > > + * Larger hugepages (1GB for x86_64) are larger than memory block, so > > + * the scan can start at the tail page of larger hugepages. > > + * 1GB hugepage is not movable now, so we return with false for now. > > + */ > > + if (PageTail(hpage)) > > + return false; > > + h = page_hstate(hpage); > > + spin_lock(&hugetlb_lock); > > + list_for_each_entry(page, &h->hugepage_activelist, lru) > > + if (page == hpage) { > > + ret = true; > > + break; > > + } > > + spin_unlock(&hugetlb_lock); > > + return ret; > > +} > > + > > May be is_hugepage_active() ?
Yes, it would be nice. Thanks, Naoya -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
