From: Ard Biesheuvel <ardb@kernel.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Wupeng Ma <mawupeng1@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
X86 ML <x86@kernel.org>,
hpa@zyccr.com, Darren Hart <dvhart@infradead.org>,
Andy Shevchenko <andy@infradead.org>,
Mike Rapoport <rppt@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Joerg Roedel <jroedel@suse.de>,
songmuchun@bytedance.com, macro@orcam.me.uk,
Frederic Weisbecker <frederic@kernel.org>,
W_Armin@gmx.de, John Garry <john.garry@huawei.com>,
Sean Christopherson <seanjc@google.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
chenhuacai@kernel.org, David Hildenbrand <david@redhat.com>,
gpiccoli@igalia.com, Mark Rutland <mark.rutland@arm.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-efi <linux-efi@vger.kernel.org>,
linux-ia64@vger.kernel.org, platform-driver-x86@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [PATCH v2 7/9] mm: Calc the right pfn if page size is not 4K
Date: Tue, 19 Apr 2022 20:29:27 +0200 [thread overview]
Message-ID: <CAMj1kXFnEhJ4Qu50Ads9psY6kmT3ddw5Za+6-YqUM+eYj1Oafw@mail.gmail.com> (raw)
In-Reply-To: <672ff459-81bd-38ef-882d-e718992d295c@arm.com>
On Tue, 19 Apr 2022 at 13:13, Anshuman Khandual
<anshuman.khandual@arm.com> wrote:
>
>
>
> On 4/14/22 15:43, Wupeng Ma wrote:
> > From: Ma Wupeng <mawupeng1@huawei.com>
> >
> > Previous 0x100000 is used to check the 4G limit in
> > find_zone_movable_pfns_for_nodes(). This is right in x86 because
> > the page size can only be 4K. But 16K and 64K are available in
> > arm64. So replace it with PHYS_PFN(SZ_4G).
> >
> > Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
> > ---
> > mm/page_alloc.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 6e5b4488a0c5..570d0ebf98df 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -7870,7 +7870,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
> >
> > usable_startpfn = memblock_region_memory_base_pfn(r);
> >
> > - if (usable_startpfn < 0x100000) {
> > + if (usable_startpfn < PHYS_PFN(SZ_4G)) {
> > mem_below_4gb_not_mirrored = true;
> > continue;
> > }
>
> Regardless PFN value should never be encoded directly.
>
> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Andrew, can you please take this one through the -mm tree? The rest of
the series needs a bit more work, but is an obvious fix and there is
no point in holding it up.
Thanks,
Ard.
next prev parent reply other threads:[~2022-04-19 18:35 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 10:13 [PATCH v2 0/9] introduce mirrored memory support for arm64 Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 1/9] efi: Make efi_print_memmap() public Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 2/9] arm64: efi: Add fake memory support Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 3/9] efi: Make efi_find_mirror() public Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 4/9] arm64/mirror: arm64 enabling - find mirrored memory ranges Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 5/9] mm: Ratelimited mirrored memory related warning messages Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 6/9] mm: Demote warning message in vmemmap_verify() to debug level Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 7/9] mm: Calc the right pfn if page size is not 4K Wupeng Ma
2022-04-19 9:59 ` David Hildenbrand
2022-04-19 11:14 ` Anshuman Khandual
2022-04-19 18:29 ` Ard Biesheuvel [this message]
2022-04-20 22:27 ` Andrew Morton
2022-04-20 22:39 ` Ard Biesheuvel
2022-04-14 10:13 ` [PATCH v2 8/9] efi: Disable mirror feature if kernelcore is not specified Wupeng Ma
2022-04-14 10:13 ` [PATCH v2 9/9] ia64/efi: Code simplification in efi_init Wupeng Ma
2022-04-14 10:22 ` [PATCH v2 0/9] introduce mirrored memory support for arm64 Ard Biesheuvel
2022-04-16 1:32 ` mawupeng
2022-04-19 18:32 ` Ard Biesheuvel
2022-04-20 2:13 ` mawupeng
2022-04-19 7:01 ` [PATCH 0/2] Add support to relocate kernel image to mirrored region Wupeng Ma
2022-04-19 7:01 ` [PATCH 1/2] arm64/boot/KASLR: " Wupeng Ma
2022-04-19 7:01 ` [PATCH 2/2] arm64/boot: Add support to relocate kernel image to mirrored region without kaslr Wupeng Ma
2022-05-03 9:58 ` [PATCH 0/2] Add support to relocate kernel image to mirrored region Ard Biesheuvel
2022-05-07 9:28 ` mawupeng
2022-05-19 11:09 ` mawupeng
2022-05-20 6:52 ` Ard Biesheuvel
2022-05-20 6:52 ` Ard Biesheuvel
2022-05-23 11:48 ` mawupeng
2022-05-23 1:18 ` mawupeng
2022-05-23 14:41 ` Ard Biesheuvel
2022-05-24 1:11 ` mawupeng
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