[Xen-devel] Re: [PATCH][RFC] fix some spinlock issues in vmsi

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 06/03/2009 09:21, "Qing He" <qing.he@xxxxxxxxx> wrote:

>> Add the locks, making it correct. Then optimise later as necessary, using
>> RCU or (perhaps easier) just smaller locks: Per MSI-X or per-pci-dev or
>> whatever. Throwing in racey code condemns us to subtle races forever more.
> 
> Ok, I'll make a patch to use the locks.
> 
> Do you think it's ok to assume that guest has already free the device
> when calling remove_pci_device on hotplugging?

Do you mean deinitialised and unloaded the device driver?

 -- Keir



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