From: Mike Rapoport <rppt@kernel.org>
To: openrisc@lists.librecores.org
Subject: [OpenRISC] [PATCH 06/15] powerpc: fadamp: simplify fadump_reserve_crash_area()
Date: Sat, 01 Aug 2020 10:19:13 -0000 [thread overview]
Message-ID: <20200801101854.GD534153@kernel.org> (raw)
In-Reply-To: <87d04d5hda.fsf@mpe.ellerman.id.au>
On Thu, Jul 30, 2020 at 10:15:13PM +1000, Michael Ellerman wrote:
> Mike Rapoport <rppt@kernel.org> writes:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> >
> > fadump_reserve_crash_area() reserves memory from a specified base address
> > till the end of the RAM.
> >
> > Replace iteration through the memblock.memory with a single call to
> > memblock_reserve() with appropriate that will take care of proper memory
> ^
> parameters?
> > reservation.
> >
> > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> > ---
> > arch/powerpc/kernel/fadump.c | 20 +-------------------
> > 1 file changed, 1 insertion(+), 19 deletions(-)
>
> I think this looks OK to me, but I don't have a setup to test it easily.
> I've added Hari to Cc who might be able to.
>
> But I'll give you an ack in the hope that it works :)
Actually, I did some digging in the git log and the traversal was added
there on purpose by the commit b71a693d3db3 ("powerpc/fadump: exclude
memory holes while reserving memory in second kernel")
Presuming this is still reqruired I'm going to drop this patch and will
simply replace for_each_memblock() with for_each_mem_range() in v2.
> Acked-by: Michael Ellerman <mpe@ellerman.id.au>
>
>
> > diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
> > index 78ab9a6ee6ac..2446a61e3c25 100644
> > --- a/arch/powerpc/kernel/fadump.c
> > +++ b/arch/powerpc/kernel/fadump.c
> > @@ -1658,25 +1658,7 @@ int __init fadump_reserve_mem(void)
> > /* Preserve everything above the base address */
> > static void __init fadump_reserve_crash_area(u64 base)
> > {
> > - struct memblock_region *reg;
> > - u64 mstart, msize;
> > -
> > - for_each_memblock(memory, reg) {
> > - mstart = reg->base;
> > - msize = reg->size;
> > -
> > - if ((mstart + msize) < base)
> > - continue;
> > -
> > - if (mstart < base) {
> > - msize -= (base - mstart);
> > - mstart = base;
> > - }
> > -
> > - pr_info("Reserving %lluMB of memory at %#016llx for preserving crash data",
> > - (msize >> 20), mstart);
> > - memblock_reserve(mstart, msize);
> > - }
> > + memblock_reserve(base, memblock_end_of_DRAM() - base);
> > }
> >
> > unsigned long __init arch_reserved_kernel_pages(void)
> > --
> > 2.26.2
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2020-08-01 10:19 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-28 5:12 [OpenRISC] [PATCH 00/15] memblock: seasonal cleaning^w cleanup Mike Rapoport
2020-07-28 5:12 ` [OpenRISC] [PATCH 01/15] KVM: PPC: Book3S HV: simplify kvm_cma_reserve() Mike Rapoport
2020-07-28 5:12 ` [OpenRISC] [PATCH 02/15] dma-contiguous: simplify cma_early_percent_memory() Mike Rapoport
2020-07-28 6:37 ` Christoph Hellwig
2020-07-28 5:12 ` [OpenRISC] [PATCH 03/15] arm, xtensa: simplify initialization of high memory pages Mike Rapoport
2020-07-28 8:09 ` Max Filippov
2020-07-28 5:12 ` [OpenRISC] [PATCH 04/15] arm64: numa: simplify dummy_numa_init() Mike Rapoport
2020-07-29 8:31 ` Jonathan Cameron
2020-07-30 12:04 ` Catalin Marinas
2020-07-28 5:13 ` [OpenRISC] [PATCH 05/15] h8300, nds32, openrisc: simplify detection of memory extents Mike Rapoport
2020-07-29 11:42 ` Stafford Horne
2020-07-28 5:13 ` [OpenRISC] [PATCH 06/15] powerpc: fadamp: simplify fadump_reserve_crash_area() Mike Rapoport
2020-07-30 12:15 ` Michael Ellerman
2020-08-01 10:19 ` Mike Rapoport [this message]
2020-08-01 10:54 ` Hari Bathini
2020-08-02 13:14 ` Michael Ellerman
2020-07-28 5:13 ` [OpenRISC] [PATCH 07/15] riscv: drop unneeded node initialization Mike Rapoport
2020-07-28 5:13 ` [OpenRISC] [PATCH 08/15] mircoblaze: drop unneeded NUMA and sparsemem initializations Mike Rapoport
2020-07-28 5:13 ` [OpenRISC] [PATCH 09/15] memblock: make for_each_memblock_type() iterator private Mike Rapoport
2020-07-30 1:52 ` Baoquan He
2020-07-28 5:13 ` [OpenRISC] [PATCH 10/15] memblock: make memblock_debug and related functionality private Mike Rapoport
2020-07-30 1:54 ` Baoquan He
2020-07-28 5:14 ` [OpenRISC] [PATCH 11/15] memblock: reduce number of parameters in for_each_mem_range() Mike Rapoport
2020-07-30 2:22 ` Baoquan He
2020-07-28 5:14 ` [OpenRISC] [PATCH 12/15] arch, mm: replace for_each_memblock() with for_each_mem_pfn_range() Mike Rapoport
2020-07-28 5:14 ` [OpenRISC] [PATCH 13/15] arch, drivers: replace for_each_membock() with for_each_mem_range() Mike Rapoport
2020-07-28 15:03 ` Emil Renner Berthing
2020-07-28 5:14 ` [OpenRISC] [PATCH 14/15] x86/numa: remove redundant iteration over memblock.reserved Mike Rapoport
2020-07-28 10:44 ` Ingo Molnar
2020-07-28 10:56 ` Mike Rapoport
2020-07-28 11:31 ` Ingo Molnar
2020-07-28 11:03 ` Baoquan He
2020-07-28 14:15 ` Mike Rapoport
2020-07-28 14:24 ` Baoquan He
2020-07-28 5:14 ` [OpenRISC] [PATCH 15/15] memblock: remove 'type' parameter from for_each_memblock() Mike Rapoport
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