linux-kernel - RE: [RFC] arm:extend the reserved mrmory for initrd to be page aligned

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Date:	Mon, 15 Sep 2014 18:22:12 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	'Russell King - ARM Linux' <linux@....linux.org.uk>
CC:	'Will Deacon' <will.deacon@....com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>,
	"'linux-mm@...ck.org'" <linux-mm@...ck.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: RE: [RFC] arm:extend the reserved mrmory for initrd to be page
 aligned

Hi

Oh, I see your meaning,
Yeah , my initrd is a cpio image,
And it can still work after apply this patch.


-----Original Message-----
From: Russell King - ARM Linux [mailto:linux@....linux.org.uk] 
Sent: Monday, September 15, 2014 6:17 PM
To: Wang, Yalin
Cc: 'Will Deacon'; 'linux-kernel@...r.kernel.org'; 'linux-arm-kernel@...ts.infradead.org'; 'linux-mm@...ck.org'; linux-arm-msm@...r.kernel.org
Subject: Re: [RFC] arm:extend the reserved mrmory for initrd to be page aligned

On Mon, Sep 15, 2014 at 05:59:27PM +0800, Wang, Yalin wrote:
> Hi
> 
> Add more log:
> <4>[    0.000000] INITRD unalign phys address:0x02000000+0x0022fb0e
> <4>[    0.000000] INITRD aligned phys address:0x02000000+0x00230000
> <4>[    0.574868] free_initrd: free initrd 0xc2000000+0xc222fb0e
> <4>[    0.579398] free_initrd_mem: free pfn:8192---8752
> 
> The inird used memory is still the same as the one passed by 
> bootloads, I don't change it. It should be safe.

This tells me nothing about whether the initrd is actually /used/.  What it tells me is that it's being freed.  The function of an initrd is not to be a chunk of memory which gets freed later on in the boot process.
It is there to provide an "initial ramdisk" (whether it be a filesystem image, or a CPIO compressed archive) for userspace to run.

So, have you checked that initrd is still functional after this patch?

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