On 12/28/18 at 11:00am, Pingfan Liu wrote: > The bottom-up allocation style is introduced to cope with movable_node, > where the limit inferior of allocation starts from kernel's end, due to > lack of knowledge of memory hotplug info at this early time. > Beside this original aim, 'kexec -c' prefers to reuse this style to alloc mem
Wondering what is 'kexec -c'. > at lower address, since if the reserved region is beyond 4G, then it requires > extra mem (default is 16M) for swiotlb. But at this time hotplug info has been The default is 256M, not sure if we are talking about the same thing. low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20); > got, the limit inferior can be extend to 0, which is done by this series > > Cc: Tang Chen <tangc...@cn.fujitsu.com> > Cc: "Rafael J. Wysocki" <r...@rjwysocki.net> > Cc: Len Brown <l...@kernel.org> > Cc: Andrew Morton <a...@linux-foundation.org> > Cc: Mike Rapoport <r...@linux.vnet.ibm.com> > Cc: Michal Hocko <mho...@suse.com> > Cc: Jonathan Corbet <cor...@lwn.net> > Cc: Yaowei Bai <baiyao...@cmss.chinamobile.com> > Cc: Pavel Tatashin <pasha.tatas...@oracle.com> > Cc: Nicholas Piggin <npig...@gmail.com> > Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com> > Cc: Daniel Vacek <ne...@redhat.com> > Cc: Mathieu Malaterre <ma...@debian.org> > Cc: Stefan Agner <ste...@agner.ch> > Cc: Dave Young <dyo...@redhat.com> > Cc: Baoquan He <b...@redhat.com> > Cc: ying...@kernel.org, > Cc: vgo...@redhat.com > Cc: linux-kernel@vger.kernel.org > > Pingfan Liu (2): > mm/memblock: extend the limit inferior of bottom-up after parsing > hotplug attr > x86/kdump: bugfix, make the behavior of crashkernel=X consistent with > kaslr > > arch/x86/kernel/setup.c | 9 +++++--- > drivers/acpi/numa.c | 4 ++++ > include/linux/memblock.h | 1 + > mm/memblock.c | 58 > +++++++++++++++++++++++++++++------------------- > 4 files changed, 46 insertions(+), 26 deletions(-) > > -- > 2.7.4 >
