On Mon, Nov 16, Andrew Cooper wrote: > On 16/11/15 06:36, Zhangbo (Oscar) wrote: > > Hi all: > > I'd like to SLEEP a while in xen kernel during VMEXIT, the easiest way > > is to call "udelay" or "mdelay" there. However, these 2 functions use busy > > wait to sleep, which is a waste. > > In linux kernel, there's a function named 'schedule_timeout', allowing > > the CPU to run other tasks during SLEEPING. > > So, is there any equivalent function to "schedule_timeout" in xen kernel > > ? > > Thanks in advance. > > > > There is not any equivalent. Paths through Xen are synchronous > (scheduling vCPUS has different requirements/constraints than scheduling > userspace tasks), and there are no concepts of tasks like the Linux > kernel has.
For xenpaging xen/common/wait.c was invented, which gives some sort of async. The thread of execution goes to sleep, until another thread wakes it up again. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
