From: Randy Dunlap <randy.dunlap@oracle.com>
To: Michael Neuling <mikey@neuling.org>
Cc: linux-kernel@vger.kernel.org, H Peter Anvin <hpa@zytor.com>,
Andrew Morton <akpm@osdl.org>, Al Viro <viro@ftp.linux.org.uk>
Subject: Re: [PATCH] free initrds boot option
Date: Wed, 6 Dec 2006 16:25:48 -0800 [thread overview]
Message-ID: <20061206162548.7c145d2c.randy.dunlap@oracle.com> (raw)
In-Reply-To: <4410.1165450723@neuling.org>
On Thu, 07 Dec 2006 11:18:43 +1100 Michael Neuling wrote:
> Add free_initrd= option to control freeing of initrd memory after
> extraction. By default, free memory as previously.
Please add doc. for this in Documentation/kernel-parameters.txt.
> Signed-off-by: Michael Neuling <mikey@neuling.org>
> ---
> Useful for kexec when you want to reuse the same initrd. Testing on
> POWERPC with CPIOs
>
> init/initramfs.c | 18 ++++++++++++++++--
> 1 file changed, 16 insertions(+), 2 deletions(-)
>
> Index: linux-2.6-ozlabs/init/initramfs.c
> ===================================================================
> --- linux-2.6-ozlabs.orig/init/initramfs.c
> +++ linux-2.6-ozlabs/init/initramfs.c
> @@ -487,6 +487,17 @@ static char * __init unpack_to_rootfs(ch
> return message;
> }
>
> +static int do_free_initrd = 1;
> +
> +int __init free_initrd_param(char *p)
> +{
> + if (p && strncmp(p, "0", 1) == 0)
> + do_free_initrd = 0;
> +
> + return 0;
> +}
> +early_param("free_initrd", free_initrd_param);
> +
> extern char __initramfs_start[], __initramfs_end[];
> #ifdef CONFIG_BLK_DEV_INITRD
> #include <linux/initrd.h>
> @@ -494,10 +505,13 @@ extern char __initramfs_start[], __initr
>
> static void __init free_initrd(void)
> {
> -#ifdef CONFIG_KEXEC
> unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
> unsigned long crashk_end = (unsigned long)__va(crashk_res.end);
>
> + if (!do_free_initrd)
> + goto skip;
> +
> +#ifdef CONFIG_KEXEC
> /*
> * If the initrd region is overlapped with crashkernel reserved region,
> * free only memory that is not part of crashkernel region.
> @@ -515,7 +529,7 @@ static void __init free_initrd(void)
> } else
> #endif
> free_initrd_mem(initrd_start, initrd_end);
> -
> +skip:
> initrd_start = 0;
> initrd_end = 0;
> }
> -
---
~Randy
next prev parent reply other threads:[~2006-12-07 0:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-07 0:18 [PATCH] free initrds boot option Michael Neuling
2006-12-07 0:25 ` Randy Dunlap [this message]
2006-12-07 0:30 ` Andrew Morton
2006-12-07 0:37 ` H. Peter Anvin
2006-12-07 3:36 ` Michael Neuling
2006-12-07 16:47 ` [Fastboot] " Vivek Goyal
2006-12-07 21:40 ` Haren Myneni
2006-12-07 23:32 ` Michael Neuling
2006-12-13 1:35 ` [Fastboot] " Horms
2007-02-08 12:35 ` Horms
2007-02-08 22:58 ` Michael Neuling
2006-12-07 3:56 ` Haren Myneni
2006-12-07 3:42 Michael Neuling
2006-12-07 5:07 ` Randy Dunlap
2006-12-07 5:14 ` Randy Dunlap
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