[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO"
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO" |
Date: |
Thu, 28 May 2015 13:19:08 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
On 28/05/2015 13:11, Fam Zheng wrote:
> > Whoever uses ioeventfd needs to implement pause/resume, yes---not just
> > dataplane, also "regular" virtio-blk/virtio-scsi.
> >
> > However, everyone else should be okay, because the bottom half runs
> > immediately and the big QEMU lock is not released in the meanwhile. So
> > the CPUs have no occasion to run. This needs a comment!
>
> I'm not sure. It seems timer callbacks also do I/O, for example
> nvme_process_sq().
Right, that's also true for USB devices. :(
Perhaps we can skip block_job_defer_to_main_loop if not necessary
(bs->aio_context == qemu_get_aio_context()).
Paolo
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", (continued)
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Max Reitz, 2015/05/26
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Kevin Wolf, 2015/05/27
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/27
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Kevin Wolf, 2015/05/27
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/27
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/27
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO",
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Andrey Korolyov, 2015/05/29
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/30
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Kevin Wolf, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Kevin Wolf, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Fam Zheng, 2015/05/28
- Re: [Qemu-devel] [PATCH v6 01/13] block: Add op blocker type "device IO", Paolo Bonzini, 2015/05/28