linux-kernel - Re: [PATCH v5 10/14] efi: only print saved efi runtime maps instead of all memmap ranges for kexec

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Message-ID: <20131216020010.GC3754@dhcp-16-126.nay.redhat.com>
Date:	Mon, 16 Dec 2013 10:00:10 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, greg@...ah.com, matt@...sole-pimps.org,
	toshi.kani@...com
Subject: Re: [PATCH v5 10/14] efi: only print saved efi runtime maps instead
 of all memmap ranges for kexec

> > -	print_efi_memmap();
> > +	if (efi_setup) {
> > +		int s;
> > +		struct efi_setup_data *data;
> > +
> > +		s = sizeof(*data) + nr_efi_runtime_map * sizeof(data->map[0]);
> > +		data = early_memremap(efi_setup, s);
> > +		if (!data)
> > +			return;
> > +		print_efi_memmap(data->map, nr_efi_runtime_map,
> > +				 sizeof(data->map[0]));
> > +		early_memunmap(data, s);
> 
> Well, if you call print_efi_memmap() in parse_efi_setup() you can save
> yourself that map/unmaping no?

In parse_efi_setup, I need map twice as well:
  mapping sizeof(struct setup_data) to get the payload len, then mapping
  the data->map again and call print_efi_memmap..

Another where what I print in this patch is same position what non-kexec kernel
does, it looks better that print them only if earlier init is ok. 

--
Thanks for review
Dave
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