Message ID | 20240122194200.381241-9-david@redhat.com |
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State | New |
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Mon, 22 Jan 2024 19:42:47 +0000 (UTC) From: David Hildenbrand <david@redhat.com> To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, David Hildenbrand <david@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Matthew Wilcox <willy@infradead.org>, Ryan Roberts <ryan.roberts@arm.com>, Russell King <linux@armlinux.org.uk>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Dinh Nguyen <dinguyen@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>, "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Alexander Gordeev <agordeev@linux.ibm.com>, Gerald Schaefer <gerald.schaefer@linux.ibm.com>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Sven Schnelle <svens@linux.ibm.com>, "David S. Miller" <davem@davemloft.net>, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org Subject: [PATCH v1 08/11] mm/memory: pass PTE to copy_present_pte() Date: Mon, 22 Jan 2024 20:41:57 +0100 Message-ID: <20240122194200.381241-9-david@redhat.com> In-Reply-To: <20240122194200.381241-1-david@redhat.com> References: <20240122194200.381241-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: <linux-kernel.vger.kernel.org> List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788821226547756305 X-GMAIL-MSGID: 1788821226547756305 |
Series |
mm/memory: optimize fork() with PTE-mapped THP
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Commit Message
David Hildenbrand
Jan. 22, 2024, 7:41 p.m. UTC
We already read it, let's just forward it.
This patch is based on work by Ryan Roberts.
Signed-off-by: David Hildenbrand <david@redhat.com>
---
mm/memory.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c index 2aa2051ee51d3..185b4aff13d62 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -959,10 +959,9 @@ static inline void __copy_present_pte(struct vm_area_struct *dst_vma, */ static inline int copy_present_pte(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma, - pte_t *dst_pte, pte_t *src_pte, unsigned long addr, int *rss, - struct folio **prealloc) + pte_t *dst_pte, pte_t *src_pte, pte_t pte, unsigned long addr, + int *rss, struct folio **prealloc) { - pte_t pte = ptep_get(src_pte); struct page *page; struct folio *folio; @@ -1104,7 +1103,7 @@ copy_pte_range(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma, } /* copy_present_pte() will clear `*prealloc' if consumed */ ret = copy_present_pte(dst_vma, src_vma, dst_pte, src_pte, - addr, rss, &prealloc); + ptent, addr, rss, &prealloc); /* * If we need a pre-allocated page for this pte, drop the * locks, allocate, and try again.