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Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk Writ

From: wyang
Subject: Re: [Qemu-discuss] Understanding QEMU Cache Modes and Emulated Disk Write Cache
Date: Wed, 17 Aug 2016 17:26:29 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

On 2016年08月17日 15:50, Fam Zheng wrote:

I am confused about the difference between the guest disk write cache and the
host page cache. Aren't these effectively the same (in both cases storing the
dirty data in the host's RAM)? Is there a difference between how one gets
Yes they are the same thing.


Fam, if they are the same thing, how to understand "cache=none" as the host page cache is disabled and guest disk write cache is enabled for the guest when setting none?



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