----- [email protected] 写道： > It's better to initialize max_pfn_mapped as initial ident > mapping size but not initial kernel map size for x86_64. > This is also in accordance with i386 code. > > It lead to page tables allocation to as high as 1G for > init_memory_mapping, > this will allow larger crashkernel reservation. > > Tested on HP DL980G7, it can reserve more than 521MiB space for kdump > kernel now. > http://bugzilla.oracle.com/bugzilla/show_bug.cgi?id=13405 > > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: "H. Peter Anvin" <[email protected]> > Cc: Yinghai Lu <[email protected]> > Signed-off-by: Zhenzhong Duan <[email protected]> > Tested-by: Dawei Pang <[email protected]> > --- > arch/x86/kernel/head64.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c > index 3a3b779..3beb94f 100644 > --- a/arch/x86/kernel/head64.c > +++ b/arch/x86/kernel/head64.c > @@ -77,7 +77,7 @@ void __init x86_64_start_kernel(char * > real_mode_data) > /* Make NULL pointers segfault */ > zap_identity_mappings(); > > - max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; > + max_pfn_mapped = PUD_PAGE_SIZE >> PAGE_SHIFT; > > for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) { > #ifdef CONFIG_EARLY_PRINTK > -- > 1.7.3
Hmm, any comment is welcome thanks zduan -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
