[PATCH] powerpc: add Book E support to 64-bit hibernation

[Wang Dongsheng-B40534]

> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Thursday, April 04, 2013 4:16 AM
> To: Wang Dongsheng-B40534
> Cc: Wood Scott-B07421; Johannes Berg; linuxppc-dev at lists.ozlabs.org
> Subject: Re: [PATCH] powerpc: add Book E support to 64-bit hibernation
> 
> On 04/03/2013 12:36:41 AM, Wang Dongsheng-B40534 wrote:
> >
> >
> > > -----Original Message-----
> > > From: Wood Scott-B07421
> > > Sent: Wednesday, April 03, 2013 8:35 AM
> > > To: Wang Dongsheng-B40534
> > > Cc: Wood Scott-B07421; Johannes Berg; linuxppc-dev at lists.ozlabs.org
> > > Subject: Re: [PATCH] powerpc: add Book E support to 64-bit
> > hibernation
> > >
> > > On 04/02/2013 12:28:40 AM, Wang Dongsheng-B40534 wrote:
> > > > Hi scott & Johannes,
> > > >
> > > > Thanks for reviewing.
> > > >
> > > > @scott, About this patch, could you please help ack this patch?
> > >
> > > Please investigate the issue of whether we are loading kernel module
> > > code in this step, and whether cache flushing is needed as a result.
> > >
> > Sorry, I am not very clear what you mean.
> > When the kernel boot end, modprobe some xx.ko?
> 
> Suppose, before the kernel was suspended, modules had been loaded.  At
> what point do those modules get restored, and when does the cache get
> flushed?
> 
Before the kernel was suspended, modules had been loaded, the modules is
already in memory. And /lib/modules/* is belong to vfs.
When suspend to disk, all used pages will be saved.(Include VFS, Loaded modules)
When restore, the kernel will not modprobe again.
The non-bootcpu will restore all pages.(Include VFS, Loaded modules)

So, It does not need to flush.