Re: [Qemu-devel] [PATCH v6 0/3] linux-aio: introduce submit I/O asabatch

[Zhang Haoyu]

>> Can we use the queued io data as caches, 
>> io write will directly return and tell the guest the io is completed after 
>> the io is enqueued, 
>> better user experience for burst io,
>> and io-read will firstly search the io queue, if matched data found, 
>> directly get the data from the queue, 
>> if not, then read the data from the disk or host page cache.
>> Any ideas?
>
>Guest kernel already has a page cache that exactly does this, also keeping a
>copy of guest request data in qemu may hurt the bandwidth in some cases.
>
You are right.
Does the io merging in queue is worthy to be performed ?

Thanks,
Zhang Haoyu
>Fam