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

To: xen-devel@xxxxxxxxxxxxxxxxxxx
From: xu cong <congxumail@xxxxxxxxx>
Date: Tue, 4 Feb 2014 16:15:28 -0500
Delivery-date: Tue, 04 Feb 2014 21:15:50 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

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.

Regards,

Cong

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