Hi David, On 11/14/18 at 10:17pm, David Hildenbrand wrote: > Let's export PG_offline via PAGE_OFFLINE_MAPCOUNT_VALUE, so > makedumpfile can directly skip pages that are logically offline and the > content therefore stale.
It would be good to copy some background info from cover letter to the patch description so that we can get better understanding why this is needed now. BTW, Lianbo is working on a documentation of the vmcoreinfo exported fields. Ccing him so that he is aware of this. Also cc Boris, although I do not want the doc changes blocks this he might have different opinion :) > > Cc: Andrew Morton <[email protected]> > Cc: Dave Young <[email protected]> > Cc: "Kirill A. Shutemov" <[email protected]> > Cc: Baoquan He <[email protected]> > Cc: Omar Sandoval <[email protected]> > Cc: Arnd Bergmann <[email protected]> > Cc: Matthew Wilcox <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: "Michael S. Tsirkin" <[email protected]> > Signed-off-by: David Hildenbrand <[email protected]> > --- > kernel/crash_core.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index 933cb3e45b98..093c9f917ed0 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -464,6 +464,8 @@ static int __init crash_save_vmcoreinfo_init(void) > VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE); > #ifdef CONFIG_HUGETLB_PAGE > VMCOREINFO_NUMBER(HUGETLB_PAGE_DTOR); > +#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline) > + VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE); > #endif > > arch_crash_save_vmcoreinfo(); > -- > 2.17.2 > Thanks Dave _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
