Hello Andrew, I proposed following patch set to support hwpoison flag at kdump second kernel. These patch set includes fixes of both kernel side and makedumpfile side, and both pathes have been acked by maintainers who are Eric and Kumagai-san. [PATCH 0/2 v2] Exclude hwpoison page from vmcore dump https://lkml.org/lkml/2012/10/31/805 [PATCH 1/2 v2] makedumpfile: Add a default action to exclude hwpoison page from vmcore https://lkml.org/lkml/2012/10/31/376 [PATCH 2/2 v2] kexec: Export PG_hwpoison flag into vmcoreinfo https://lkml.org/lkml/2012/10/31/359 Could you please push the kernel side patch to export PG_hwpoison flag into 3.9 during next merge window? This patch exports a PG_hwpoison into vmcoreinfo when CONFIG_MEMORY_FAILURE is defined. "makedumpfile" needs to read information of memory, such as 'mem_section', 'zone', 'pageflags' from vmcore. We introduce a function into "makedumpfile" to exclude hwpoison page from vmcore dump. In order to introduce this function, PG_hwpoison flag have to export into vmcoreinfo. Acked-by: "Eric W. Biederman" <ebiederm at xmission.com> Signed-off-by: Mitsuhiro Tanino <mitsuhiro.tanino.gm at hitachi.com> --- kernel/kexec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/kexec.c b/kernel/kexec.c index 0668d58..0d5d6bc 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -1513,6 +1513,9 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_NUMBER(PG_lru); VMCOREINFO_NUMBER(PG_private); VMCOREINFO_NUMBER(PG_swapcache); +#ifdef CONFIG_MEMORY_FAILURE + VMCOREINFO_NUMBER(PG_hwpoison); +#endif arch_crash_save_vmcoreinfo(); update_vmcoreinfo_note(); -- 1.7.10.1
