Messages in this thread Patch in this message | | | From | Michael Neuling <> | Subject | [PATCH] free initrds boot option | Date | Thu, 07 Dec 2006 14:42:57 +1100 |
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Add retain_initrd option to control freeing of initrd memory after extraction. By default, free memory as previously.
Signed-off-by: Michael Neuling <mikey@neuling.org> --- Updated based on comments from akpm. Added documentation and changed option name to "retain_initrd" Tested on POWERPC with CPIOs
Documentation/kernel-parameters.txt | 2 ++ init/initramfs.c | 18 ++++++++++++++++-- 2 files changed, 18 insertions(+), 2 deletions(-)
Index: linux-2.6-ozlabs/Documentation/kernel-parameters.txt =================================================================== --- linux-2.6-ozlabs.orig/Documentation/kernel-parameters.txt +++ linux-2.6-ozlabs/Documentation/kernel-parameters.txt @@ -1366,6 +1366,8 @@ and is between 256 and 4096 characters. resume= [SWSUSP] Specify the partition device for software suspend + retain_initrd [RAM] Keep initrd memory after extraction + rhash_entries= [KNL,NET] Set number of hash buckets for route cache 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_retain_initrd = 0; + +static int __init retain_initrd_param(char *str) +{ + if (*str) + return 0; + do_retain_initrd = 1; + return 1; +} +__setup("retain_initrd", retain_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_retain_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; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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