METHOD AND DEVICE FOR PROCESSING I/O REQUEST UNDER KVM VIRTUALIZATION

WIPO Patent Application WO/2017/121273

A1

Provided are a method and device for processing an I/O request under KVM virtualization. The method comprises: intercepting, by means of a kernel-based virtual machine (KVM), an I/O request transmitted by a virtual machine, and determining information of an I/O channel corresponding to the I/O request, wherein the I/O channel has a corresponding buffer zone, and the information of the I/O channel includes a file descriptor for an event notification (eventfd) (101); writing the I/O request into the buffer zone of the corresponding I/O channel (102); using the eventfd to notify the I/O channel of a corresponding user mode process (103); and in the user mode process, monitoring, according to the eventfd, an event of the corresponding I/O channel, acquiring the I/O request from the buffer zone of the corresponding I/O channel, and executing I/O simulation on the I/O request (104), wherein the user mode process includes a first device simulation process and a second device simulation process that is independent from the first device simulation process. The method can realize distribution of I/O requests in a kernel mode, and can support multiple device simulation processes for a single virtual machine, thereby improving an I/O simulation efficiency.

ZHANG XIANTAO (CN)
DING SHENGGE (CN)
TIAN SHUANGTAI (CN)

PCT/CN2017/070151

July 20, 2017

January 04, 2017

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ALIBABA GROUP HOLDING LTD (CN)

G06F9/455

CN104503825A	2015-04-08
CN101968746A	2011-02-09
CN101706757A	2010-05-12
CN104104705A	2014-10-15
US20080104589A1	2008-05-01

BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)

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