Invention Grant
US08495262B2 Using a table to determine if user buffer is marked copy-on-write
失效
使用表来确定用户缓冲区是否被标记为写时复制
- Patent Title: Using a table to determine if user buffer is marked copy-on-write
- Patent Title (中): 使用表来确定用户缓冲区是否被标记为写时复制
-
Application No.: US12953234Application Date: 2010-11-23
-
Publication No.: US08495262B2Publication Date: 2013-07-23
- Inventor: Prashanth K. Nageshappa , Sathiskumar Palaniappan
- Applicant: Prashanth K. Nageshappa , Sathiskumar Palaniappan
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Winstead, P.C.
- Agent Robert A. Voigt, Jr.
- Main IPC: G06F3/00
- IPC: G06F3/00 ; G06F13/28
Abstract:
A method, system and computer program product for determining if a buffer is marked copy-on-write. A user applications selects a buffer in user space to store data involved in a write/read operation. The user application searches a table storing addresses of buffers in user space that are marked copy-on-write to determine if the address of the selected buffer is listed in the table. If the address is listed in the table, then the selected buffer is marked copy-on-write. If the address is not listed in the table, then the selected buffer is not marked copy-on-write. By having a table store a list of addresses of buffers in user space that are marked copy-on-write by the kernel, the user application is now able to know whether the buffer in user space is marked copy-on-write.
Public/Granted literature
- US20120131235A1 USING A TABLE TO DETERMINE IF USER BUFFER IS MARKED COPY-ON-WRITE Public/Granted day:2012-05-24
Information query
