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Re: [Qemu-devel] Linux kernel polling for QEMU
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] Linux kernel polling for QEMU |
Date: |
Wed, 30 Nov 2016 09:46:10 +0000 |
On 30 November 2016 at 09:05, Andrew Jones <address@hidden> wrote:
> The problem is indeed with the scheduling. The way it currently works
> is to depend on the iothread to kick a reschedule once in a while, or
> a cpu to issue an instruction that does so (wfe/wfi). However if
> there's no io and a cpu never issues a scheduling instruction, then it
> won't happen. We either need a sched tick or to never have an infinite
> iothread ppoll timeout (basically using the ppoll timeout as a tick).
Ah yes, that one. I thought Alex had a patch which added
a timer to ensure that we don't allow a single guest
TCG vCPU to hog the execution thread, but maybe I'm
misremembering.
thanks
-- PMM
- Re: [Qemu-devel] Linux kernel polling for QEMU, (continued)
- Re: [Qemu-devel] Linux kernel polling for QEMU, Fam Zheng, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Paolo Bonzini, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Fam Zheng, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Andrew Jones, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Fam Zheng, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Andrew Jones, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Paolo Bonzini, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Andrew Jones, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Peter Maydell, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU, Andrew Jones, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU,
Peter Maydell <=
- Re: [Qemu-devel] Linux kernel polling for QEMU, Paolo Bonzini, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU, Paolo Bonzini, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Stefan Hajnoczi, 2016/11/29
- Re: [Qemu-devel] Linux kernel polling for QEMU, Fam Zheng, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU, Stefan Hajnoczi, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU, Fam Zheng, 2016/11/30
- Re: [Qemu-devel] Linux kernel polling for QEMU, Stefan Hajnoczi, 2016/11/30