Re: [Xen-devel] Does blkback bypass Dom0's memory buffer?

[xu cong <congxumail@xxxxxxxxx>]

Yes, my question is confusing. Please ignore the last sentence. I just wonder whether block backend thread will use Dom0's memory buffer or not. Thanks.

2014-02-04 Wei Liu <liuw@xxxxxxxxx>:

On Tue, Feb 4, 2014 at 9:15 PM, xu cong <congxumail@xxxxxxxxx> wrote:
> Does blkback thread bypass Dom0's memory buffer? If I write in DomU without
> O_Direct, the data will be buffered in DomU's memory cache then be flushed
> to disk. Will them be buffered in Dom0's memory again? How about the
> netback? Thanks.
>

Why is netback involved? I don't quite get your question. Block device
has a completely different data path from network.

Wei.

> Regards,
> Cong
>
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