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[2a03:2880:20ff:70::face:b00c]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-44fe8123516sm50426311cf.1.2024.07.30.05.54.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jul 2024 05:54:11 -0700 (PDT) From: Usama Arif To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: hannes@cmpxchg.org, riel@surriel.com, shakeel.butt@linux.dev, roman.gushchin@linux.dev, yuzhao@google.com, david@redhat.com, baohua@kernel.org, ryan.roberts@arm.com, rppt@kernel.org, willy@infradead.org, cerasuolodomenico@gmail.com, corbet@lwn.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kernel-team@meta.com, Usama Arif Subject: [PATCH 2/6] Revert "mm: remove free_unref_page_list()" Date: Tue, 30 Jul 2024 13:45:59 +0100 Message-ID: <20240730125346.1580150-3-usamaarif642@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240730125346.1580150-1-usamaarif642@gmail.com> References: <20240730125346.1580150-1-usamaarif642@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" free_unref_page_list will be needed in a later patch for an optimization to free zapped tail pages when splitting isolated thp. Signed-off-by: Usama Arif --- mm/internal.h | 1 + mm/page_alloc.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/mm/internal.h b/mm/internal.h index 7a3bcc6d95e7..259afe44dc88 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -680,6 +680,7 @@ extern int user_min_free_kbytes; =20 void free_unref_page(struct page *page, unsigned int order); void free_unref_folios(struct folio_batch *fbatch); +void free_unref_page_list(struct list_head *list); =20 extern void zone_pcp_reset(struct zone *zone); extern void zone_pcp_disable(struct zone *zone); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index aae00ba3b3bd..38832e6b1e6c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2774,6 +2774,24 @@ void free_unref_folios(struct folio_batch *folios) folio_batch_reinit(folios); } =20 +void free_unref_page_list(struct list_head *list) +{ + struct folio_batch fbatch; + + folio_batch_init(&fbatch); + while (!list_empty(list)) { + struct folio *folio =3D list_first_entry(list, struct folio, lru); + + list_del(&folio->lru); + if (folio_batch_add(&fbatch, folio) > 0) + continue; + free_unref_folios(&fbatch); + } + + if (fbatch.nr) + free_unref_folios(&fbatch); +} + /* * split_page takes a non-compound higher-order page, and splits it into * n (1<