linux-kernel - Re: Make sure we populate the initroot filesystem late enough

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Message-Id: <1172452660.3971.33.camel@shinybook.infradead.org>
Date:	Sun, 25 Feb 2007 20:17:40 -0500
From:	David Woodhouse <dwmw2@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...abs.org, john stultz <johnstul@...ibm.com>
Subject: Re: Make sure we populate the initroot filesystem late enough

On Sun, 2007-02-25 at 16:24 -0800, Linus Torvalds wrote:
> Hmm. No, I don't think that should be a problem. free_initmem() only 
> happens at the very, after do_basic_setup() has been run, which
> includes all the initcall stuff.

I'm inclined to agree that it _shouldn't_ be a problem. Nevertheless,
even this hack seems sufficient to 'fix' it:

--- arch/powerpc/mm/init_32.c   2007-02-25 20:06:54.000000000 -0500
+++ arch/powerpc/mm/init_32.c.not       2007-02-25 20:06:41.000000000 -0500
@@ -243,13 +243,14 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
        if (start < end)
-               printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
+               printk ("NOT Freeing initrd memory: %ldKiB would be freed\n", (end - start) >> 10);
+       return;
        for (; start < end; start += PAGE_SIZE) {
                ClearPageReserved(virt_to_page(start));
                init_page_count(virt_to_page(start));
                free_page(start);
                totalram_pages++;
        }
 }
 #endif


-- 
dwmw2

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