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Re: [Qemu-devel] [RFC] vhost: Can we change synchronize_rcu to call_rcu

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [RFC] vhost: Can we change synchronize_rcu to call_rcu in vhost_set_memory() in vhost kernel module?
Date: Fri, 09 May 2014 11:53:41 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

Il 09/05/2014 11:04, Gonglei (Arei) ha scritto:
> Yes, for example enabling/disabling PCI BARs would have that effect.
Yes, but PCI BARs are mapped in PCI hole, and they are not overlapped with ram
memory regions, so disable or enable PCI BARs would not change ram MRs' mapping.

PCI BARs can be RAM (one special case being the ROM BAR).


Since vhost_region_add/vhost_region_del check if changed MemoryRegionSection is 
so vhost memoey mappings will not be influenced, is this correct?

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