发明名称 |
Multipath I/O in a computer system |
摘要 |
Multipath I/O in a computer system includes: receiving asynchronously, for a single I/O operation by a memory controller from a plurality of I/O adapters, a request to access a memory page, where each request to access the memory page includes an adapter-specific tag; and for each request received by the memory controller: determining, by the memory controller, whether an adapter-specific tag has been assigned to the memory page; if an adapter-specific tag has not been assigned to the memory page: assigning, by the memory controller, the received adapter-specific tag to the memory page; and allowing, by the memory controller, access to the memory page; and if an adapter-specific tag has been assigned to the memory page, granting access to the memory page only when the received adapter-specific tag is the adapter-specific tag assigned to the memory page. |
申请公布号 |
US9529759(B1) |
申请公布日期 |
2016.12.27 |
申请号 |
US201614995982 |
申请日期 |
2016.01.14 |
申请人 |
International Business Machines Corporation |
发明人 |
Hart Brian W.;Kalavakolanu Anil;Pafumi James A.;Ramagiri Vani D.;Yeung Evelyn T. |
分类号 |
G06F13/38;G06F13/40;G06F13/42;G06F13/28 |
主分类号 |
G06F13/38 |
代理机构 |
Kennedy Lenart Spraggins LLP |
代理人 |
Kennedy Brandon C.;Johnson Grant A.;Kennedy Lenart Spraggins LLP |
主权项 |
1. An apparatus for multipath I/O (‘input/output’), the apparatus comprising a computer processor, a computer memory, a plurality of I/O adapters, and a memory controller, the memory controller configured to carry out:
receiving asynchronously, for a single I/O operation from the plurality of I/O adapters, a request to access a memory page, where each request to access the memory page includes an adapter-specific tag; and for each request received by the memory controller: determining whether an adapter-specific tag has been assigned to the memory page; if an adapter-specific tag has not been assigned to the memory page:
assigning, by the memory controller, the received adapter-specific tag to the memory page; andallowing, by the memory controller, access to the memory page; and if an adapter-specific tag has been assigned to the memory page, granting access to the memory page only when the received adapter-specific tag is the adapter-specific tag assigned to the memory page. |
地址 |
Armonk NY US |