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List:       linux-aio
Subject:    Re: kvm aio wishlist
From:       Avi Kivity <avi () redhat ! com>
Date:       2008-11-29 19:01:04
Message-ID: 49319170.9030201 () redhat ! com
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FUJITA Tomonori wrote:
>>> You can. What I wanted to say is that nobody supports ordered tag and
>>> seems you always have to do downgrading even if you implement
>>> something in aio.
>>>   
>>>       
>> That's fine.  It allows us to avoid the turkey+egg problem where we 
>> don't implement something because we have no users and we have no users 
>> because we haven't implemented anything.
>>     
>
> I'm not sure I correctly understand what you mean but IIRC there were
> some attempts to implement ordered tagging in the SCSI mid-layer and
> we decided that it's better not to support it.
>   

But if it is eventually implemented, I'd like the userspace interface to 
support it.

> BTW, anyone in kvm camp has started to work on the kernel-thread-based
> AIO support that you discussed?
>   

Anthony is working on this, I think (a userspace implementation).

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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