From: Chris Goldsworthy <quic_cgoldswo@quicinc.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: David Hildenbrand <david@redhat.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, "Sudarshan Rajagopalan" <quic_sudaraja@quicinc.com>, Georgi Djakov <quic_c_gdjako@quicinc.com>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>, Chris Goldsworthy <quic_cgoldswo@quicinc.com>, Florian Fainelli <f.fainelli@gmail.com> Subject: [PATCH] arm64: mm: update max_pfn after memory hotplug Date: Tue, 28 Sep 2021 11:51:49 -0700 [thread overview] Message-ID: <a51a27ee7be66024b5ce626310d673f24107bcb8.1632853776.git.quic_cgoldswo@quicinc.com> (raw) In-Reply-To: <cover.1632853776.git.quic_cgoldswo@quicinc.com> From: Sudarshan Rajagopalan <quic_sudaraja@quicinc.com> After new memory blocks have been hotplugged, max_pfn and max_low_pfn needs updating to reflect on new PFNs being hot added to system. Without this patch, debug-related functions that use max_pfn such as get_max_dump_pfn() or read_page_owner() will not work with any page in memory that is hot-added after boot. Fixes: 4ab215061554 ("arm64: Add memory hotplug support") Signed-off-by: Sudarshan Rajagopalan <quic_sudaraja@quicinc.com> Signed-off-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Georgi Djakov <quic_c_gdjako@quicinc.com> --- arch/arm64/mm/mmu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index cfd9deb..fd85b51 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1499,6 +1499,11 @@ int arch_add_memory(int nid, u64 start, u64 size, if (ret) __remove_pgd_mapping(swapper_pg_dir, __phys_to_virt(start), size); + else { + max_pfn = PFN_UP(start + size); + max_low_pfn = max_pfn; + } + return ret; } -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Chris Goldsworthy <quic_cgoldswo@quicinc.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: David Hildenbrand <david@redhat.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, "Sudarshan Rajagopalan" <quic_sudaraja@quicinc.com>, Georgi Djakov <quic_c_gdjako@quicinc.com>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>, Chris Goldsworthy <quic_cgoldswo@quicinc.com>, Florian Fainelli <f.fainelli@gmail.com> Subject: [PATCH] arm64: mm: update max_pfn after memory hotplug Date: Tue, 28 Sep 2021 11:51:49 -0700 [thread overview] Message-ID: <a51a27ee7be66024b5ce626310d673f24107bcb8.1632853776.git.quic_cgoldswo@quicinc.com> (raw) In-Reply-To: <cover.1632853776.git.quic_cgoldswo@quicinc.com> From: Sudarshan Rajagopalan <quic_sudaraja@quicinc.com> After new memory blocks have been hotplugged, max_pfn and max_low_pfn needs updating to reflect on new PFNs being hot added to system. Without this patch, debug-related functions that use max_pfn such as get_max_dump_pfn() or read_page_owner() will not work with any page in memory that is hot-added after boot. Fixes: 4ab215061554 ("arm64: Add memory hotplug support") Signed-off-by: Sudarshan Rajagopalan <quic_sudaraja@quicinc.com> Signed-off-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Georgi Djakov <quic_c_gdjako@quicinc.com> --- arch/arm64/mm/mmu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index cfd9deb..fd85b51 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1499,6 +1499,11 @@ int arch_add_memory(int nid, u64 start, u64 size, if (ret) __remove_pgd_mapping(swapper_pg_dir, __phys_to_virt(start), size); + else { + max_pfn = PFN_UP(start + size); + max_low_pfn = max_pfn; + } + return ret; } -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-09-28 18:52 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-28 18:51 arm64: mm: update max_pfn after memory hotplug Chris Goldsworthy 2021-09-28 18:51 ` Chris Goldsworthy 2021-09-28 18:51 ` Chris Goldsworthy [this message] 2021-09-28 18:51 ` [PATCH] " Chris Goldsworthy 2021-09-28 19:34 ` Georgi Djakov 2021-09-28 19:34 ` Georgi Djakov 2021-10-01 6:38 ` Anshuman Khandual 2021-10-01 6:38 ` Anshuman Khandual 2021-10-01 8:39 ` David Hildenbrand 2021-10-01 8:39 ` David Hildenbrand 2021-10-01 8:52 ` Anshuman Khandual 2021-10-01 8:52 ` Anshuman Khandual 2021-09-29 17:48 ` Will Deacon 2021-09-29 17:48 ` Will Deacon
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