{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9639478","patent":{"patent_number":"US-9639478","title":"Controlling direct memory access page mappings","assignee":null,"inventors":[],"filing_date":"2014-01-17T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"A method for controlling access to a memory of a computer system configured with at least one logical partition may include receiving a first request to map a first page of the memory, the request identifying a first requester. A first logical partition associated with the first page may be determined. It may be determined that an attribute of the first logical partition limits access to individual pages of the first logical partition to a single requester, and that the first page is available to be mapped to a requester. The first page may be mapped to the first requester and a flag indicating that the first page is unavailable for an additional mapping may be set. The first request may be from a device driver on behalf of an input/output adapter, as the first requester, to use the first page in a direct memory access transfer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Controlling direct memory access page mappings","description":"A method for controlling access to a memory of a computer system configured with at least one logical partition may include receiving a first request to map a first page of the memory, the request ide","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9639478","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9639478","citation_suggestion":"Patentable. \"Controlling direct memory access page mappings\" (US-9639478). https://patentable.app/patents/US-9639478","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9639478","json":"https://patentable.app/api/llm-context/US-9639478","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:25:26.722Z"}