Messages in this thread Patch in this message | | | From | Chao Fan <> | Subject | [PATCH v7 3/5] x86/KASLR: Give a warning if movable_node specified without kaslr_mem= | Date | Wed, 17 Jan 2018 18:53:49 +0800 |
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Since only 'movable_node' specified without 'kaslr_mem=' may break memory hotplug, so reconmmend users using 'kaslr_mem=' when 'movable_node' specified..
Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com> --- arch/x86/boot/compressed/kaslr.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index b200a7ceafc1..dca846b522fc 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -282,6 +282,16 @@ static int handle_mem_filter(void) !strstr(args, "kaslr_mem=")) return 0; +#ifdef CONFIG_MEMORY_HOTPLUG + /* + * Check if "kaslr_mem=" specified when "movable_node" found. If not, + * just give warrning. Otherwise memory hotplug could be + * affected if kernel put on movable memory regions. + */ + if (strstr(args, "movable_node") && !strstr(args, "kaslr_mem=")) + warn("kaslr_mem= should specified when using movable_node.\n"); +#endif + tmp_cmdline = malloc(len + 1); if (!tmp_cmdline) error("Failed to allocate space for tmp_cmdline"); -- 2.14.3
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