Re: [Qemu-devel] The first function called after migration for a block device

[Paolo Bonzini]

Il 30/06/2014 16:03, Xiongzi Ge ha scritto:
> I tried. It invalidated the cache of the block device after migration.

It didn't invalidate anything in the guest, and there's *NO WAY* 
absolutely for QEMU to influence the cache in the guest.

Again: all you can do is use O_DIRECT in the guest.

> So, here, we can use a new cache for the block device after migration.

I don't understand what you mean.

> Is it right?  I can implement a simple block driver in block/ directory.

Probably not.

Paolo