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Date: Wed, 6 Dec 2006 21:07:19 -0800 From: Randy Dunlap <randy.dunlap@...cle.com> To: Michael Neuling <mikey@...ling.org> Cc: linux-kernel@...r.kernel.org, H Peter Anvin <hpa@...or.com>, Andrew Morton <akpm@...l.org>, Al Viro <viro@....linux.org.uk> Subject: Re: [PATCH] free initrds boot option On Thu, 07 Dec 2006 14:42:57 +1100 Michael Neuling wrote: > Add retain_initrd option to control freeing of initrd memory after > extraction. By default, free memory as previously. > > Signed-off-by: Michael Neuling <mikey@...ling.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/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); How does this work when CONFIG_KEXEC=n ?? Tested? > + 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; > } > - --- ~Randy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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