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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] Linux kernel polling for QEMU |
Date: | Mon, 28 Nov 2016 16:41:13 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 28/11/2016 16:29, Stefan Hajnoczi wrote: > Thanks for sharing the link. I'll let you know before embarking on an > effort to make epoll support busy_loop. > > At the moment I'm still evaluating whether the good results we've gotten > from polling in QEMU userspace are preserved when polling is shifted to > the kernel. > > FWIW I've prototyped ioctl(EVENTFD_SET_POLL_INFO) but haven't had a > chance to test it yet: > https://github.com/stefanha/linux/commit/133e8f1da8eb5364cd5c5f7162decbc79175cd13 This would add a system call every time the main loop processes a vring, wouldn't it? Paolo
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