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From: "Yajun Deng" Message-ID: TLS-Required: No Subject: Re: [PATCH] mm/cma: get nid from physical address To: "Kefeng Wang" , akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <1d38aa26-cd2f-4330-9dcc-6c379cecb83b@huawei.com> References: <20240516091701.1527002-1-yajun.deng@linux.dev> <1d38aa26-cd2f-4330-9dcc-6c379cecb83b@huawei.com> X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: B6E7B40017 X-Rspam-User: X-Rspamd-Server: rspam12 X-Stat-Signature: rh1fh1pcywkhqqx5jneneq8jqsditd75 X-HE-Tag: 1715858170-128797 X-HE-Meta: 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 Qmwr4wOM fY38ENbMJ79NTbOBbPzkoXVQqX8wByH2ZcMzb+Rn9mNws9soeKfK1Vmgbn5SQN7lzbBLiaQdpoQBVu7f8bfU8VOQz2vTxWZHhQcEihrYOy4Ed+M75wb5KuNskTzGqBLg7FGH40pPDFb/Jk0XTPDBtuZBrxPWzcdjuXOf/Fzj9IsS3kGc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: May 16, 2024 at 6:03 PM, "Kefeng Wang" wrote= : >=20 >=20On 2024/5/16 17:17, Yajun Deng wrote: >=20 >=20>=20 >=20> The nid passed to cma_declare_contiguous_nid() may be NUMA_NO_NODE, > >=20 >=20> which is not the actual nid. To get the correct nid, we can get th= e nid > >=20 >=20> from physical address. > >=20 >=20 > Please check >=20 >=20https://lore.kernel.org/linux-riscv/47437c2b-5946-41c6-ad1b-cc03329eb= 230@huawei.com/ >=20 Okay,=20thanks! > >=20 >=20> Signed-off-by: Yajun Deng > >=20 >=20> --- > >=20 >=20> mm/cma.c | 1 + > >=20 >=20> 1 file changed, 1 insertion(+) > >=20 >=20> diff --git a/mm/cma.c b/mm/cma.c > >=20 >=20> index 3e9724716bad..be6cdde32944 100644 > >=20 >=20> --- a/mm/cma.c > >=20 >=20> +++ b/mm/cma.c > >=20 >=20> @@ -361,6 +361,7 @@ int __init cma_declare_contiguous_nid(phys_add= r_t base, > >=20 >=20> kmemleak_ignore_phys(addr); > >=20 >=20> base =3D addr; > >=20 >=20> } > >=20 >=20> + nid =3D early_pfn_to_nid(PHYS_PFN(base)); > >=20 >=20> > ret =3D cma_init_reserved_mem(base, size, order_per_bit, name, r= es_cma); > >=20 >=20> if (ret) > > >