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[2003:cb:c73b:5600:c716:d8e0:609d:ae92]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-388c801af46sm12218432f8f.61.2024.12.17.14.28.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Dec 2024 14:28:09 -0800 (PST) Message-ID: Date: Tue, 17 Dec 2024 23:28:06 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 20/25] mm/mlock: Skip ZONE_DEVICE PMDs during mlock To: Alistair Popple , akpm@linux-foundation.org, dan.j.williams@intel.com, linux-mm@kvack.org Cc: lina@asahilina.net, zhang.lyra@gmail.com, gerald.schaefer@linux.ibm.com, vishal.l.verma@intel.com, dave.jiang@intel.com, logang@deltatee.com, bhelgaas@google.com, jack@suse.cz, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, willy@infradead.org, djwong@kernel.org, tytso@mit.edu, linmiaohe@huawei.com, peterx@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, david@fromorbit.com References: From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 29F6B180004 X-Stat-Signature: oqx9utty6pkr8hg6hkoiy97d33z8mgw4 X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1734474461-943656 X-HE-Meta: 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 iBFb8KG6 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000052, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 17.12.24 06:13, Alistair Popple wrote: > At present mlock skips ptes mapping ZONE_DEVICE pages. A future change > to remove pmd_devmap will allow pmd_trans_huge_lock() to return > ZONE_DEVICE folios so make sure we continue to skip those. > > Signed-off-by: Alistair Popple > --- > mm/mlock.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/mm/mlock.c b/mm/mlock.c > index cde076f..3cb72b5 100644 > --- a/mm/mlock.c > +++ b/mm/mlock.c > @@ -368,6 +368,8 @@ static int mlock_pte_range(pmd_t *pmd, unsigned long addr, > if (is_huge_zero_pmd(*pmd)) > goto out; > folio = pmd_folio(*pmd); > + if (folio_is_zone_device(folio)) > + goto out; > if (vma->vm_flags & VM_LOCKED) > mlock_folio(folio); > else Acked-by: David Hildenbrand -- Cheers, David / dhildenb