From: Hoan Tran <Hoan@os.amperecomputing.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Oscar Salvador <osalvador@suse.de>,
Pavel Tatashin <pavel.tatashin@microsoft.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Alexander Duyck <alexander.h.duyck@linux.intel.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"David S. Miller" <davem@davemloft.net>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>
Cc: linux-mm@kvack.org (open list:MEMORY MANAGEMENT),
linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
sparclinux@vger.kernel.org, x86@kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
lho@amperecomputing.com, mmorana@amperecomputing.com,
Hoan Tran <Hoan@os.amperecomputing.com>
Subject: [PATCH v3 0/5] mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA
Date: Sat, 28 Mar 2020 11:31:17 -0700 [thread overview]
Message-ID: <1585420282-25630-1-git-send-email-Hoan@os.amperecomputing.com> (raw)
In NUMA layout which nodes have memory ranges that span across other nodes,
the mm driver can detect the memory node id incorrectly.
For example, with layout below
Node 0 address: 0000 xxxx 0000 xxxx
Node 1 address: xxxx 1111 xxxx 1111
Note:
- Memory from low to high
- 0/1: Node id
- x: Invalid memory of a node
When mm probes the memory map, without CONFIG_NODES_SPAN_OTHER_NODES
config, mm only checks the memory validity but not the node id.
Because of that, Node 1 also detects the memory from node 0 as below
when it scans from the start address to the end address of node 1.
Node 0 address: 0000 xxxx xxxx xxxx
Node 1 address: xxxx 1111 1111 1111
This layout could occur on any architecture. Most of them enables
this config by default with CONFIG_NUMA. This patch, by default, enables
CONFIG_NODES_SPAN_OTHER_NODES or uses early_pfn_in_nid() for NUMA.
v3:
* Revise the patch description
V2:
* Revise the patch description
Hoan Tran (5):
mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA
powerpc: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES
x86: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES
sparc: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES
s390: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES
arch/powerpc/Kconfig | 9 ---------
arch/s390/Kconfig | 8 --------
arch/sparc/Kconfig | 9 ---------
arch/x86/Kconfig | 9 ---------
mm/page_alloc.c | 2 +-
5 files changed, 1 insertion(+), 36 deletions(-)
--
1.8.3.1
next reply other threads:[~2020-03-28 18:32 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-28 18:31 Hoan Tran [this message]
2020-03-28 18:31 ` [PATCH v3 1/5] mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA Hoan Tran
2020-03-28 18:31 ` [PATCH v3 2/5] powerpc: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES Hoan Tran
2020-03-28 18:31 ` [PATCH v3 3/5] x86: " Hoan Tran
2020-03-28 18:31 ` [PATCH v3 4/5] sparc: " Hoan Tran
2020-03-28 18:31 ` [PATCH v3 5/5] s390: " Hoan Tran
2020-03-29 0:19 ` [PATCH v3 0/5] mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA Baoquan He
2020-03-30 7:44 ` Michal Hocko
2020-03-30 8:04 ` Baoquan He
2020-03-30 7:42 ` Michal Hocko
2020-03-30 8:16 ` Baoquan He
2020-03-30 8:28 ` Baoquan He
2020-03-30 9:21 ` Mike Rapoport
2020-03-30 9:58 ` Michal Hocko
2020-03-30 10:26 ` Mike Rapoport
2020-03-30 10:43 ` Baoquan He
2020-03-31 21:56 ` [PATCH RFC] mm: remove CONFIG_HAVE_MEMBLOCK_NODE_MAP (was: Re: [PATCH v3 0/5] mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA) Mike Rapoport
2020-04-01 5:42 ` Baoquan He
2020-04-01 7:51 ` Mike Rapoport
2020-04-02 8:01 ` Michal Hocko
2020-04-09 14:41 ` Baoquan He
2020-04-09 15:33 ` Michal Hocko
2020-04-10 6:46 ` Baoquan He
2020-03-30 9:26 ` [PATCH v3 0/5] mm: Enable CONFIG_NODES_SPAN_OTHER_NODES by default for NUMA Baoquan He
2020-03-30 17:51 ` Mike Rapoport
2020-03-30 18:23 ` Michal Hocko
2020-03-31 8:14 ` Mike Rapoport
2020-03-31 8:55 ` Michal Hocko
2020-03-31 14:03 ` Baoquan He
2020-03-31 14:21 ` Michal Hocko
2020-03-31 14:31 ` Baoquan He
2020-04-03 4:46 ` Hoan Tran
2020-04-03 7:09 ` Baoquan He
2020-04-03 16:36 ` Hoan Tran
2020-04-09 16:27 ` Mike Rapoport
2020-04-10 6:50 ` Baoquan He
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