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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 10:23:18 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

On 28/05/2015 04:49, Fam Zheng wrote:
> On a second thought, although in this series, we only need to modify
> virtio-{scsi,blk}, Wen pointed out that mirror job also wants this during
> completion (because bdrv_swap is in a BH after the job coroutine returns).

Mirror needs to pause/resume the source.  It doesn't need to handle
pause/resume of the target, does it?

> So, in order for the solution to be general, and complete, this nofitier list
> approach relies on the listening devices to do the right thing, which requires
> modifying all of them, and is harder to maintain.

Isn't it only devices that use aio_set_event_notifier for their ioeventfd?


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