On 03/01/2022 05:55 PM, Mike Rapoport wrote:
Hi,
On Tue, Mar 01, 2022 at 12:28:57PM +0800, Tiezhu Yang wrote:
In the current code, the kernel command-line parameter mem= and memmap=
can not work well on MIPS, this patchset refactors the related code to
fix them.
For kdump on MIPS, if the users want to limit the memory region for the
capture kernel to avoid corrupting the memory image of the panic kernel,
use the parameter memmap=limit@base is the proper way, I will submit a
patch to use memmap=limit@base for kexec-tools after this patchset is
applied.
Sorry, apparently I misread the prevoius version.
What's wrong with the current implementation of mem=limit@base for the
kdump case?
In the current code, without this patchset, kernel boot hangs when add
mem=3G, mem=3G@64M or memmap=3G@64M to the command-line, it means that
the parameter mem= and memmap= have bug on mips.
Thanks,
Tiezhu
v4: Fix some build warnings reported by kernel test robot
v3: Modify patch #3 to maintain compatibility for memmap=limit{$,#,!}base,
commented by Mike Rapoport, thank you
v2: Add some new patches to support memmap=limit@base
Tiezhu Yang (4):
MIPS: Refactor early_parse_mem() to fix mem= parameter
memblock: Introduce memblock_mem_range_remove_map()
MIPS: Refactor early_parse_memmap() to fix memmap= parameter
MIPS: Remove not used variable usermem
arch/mips/kernel/setup.c | 69 ++++++++++++++++++++++--------------------------
include/linux/memblock.h | 1 +
mm/memblock.c | 9 +++++--
3 files changed, 40 insertions(+), 39 deletions(-)
--
2.1.0
