From patchwork Thu Jan 30 10:00:48 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A. 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Shutemov" To: Andrew Morton , "Matthew Wilcox (Oracle)" , Jens Axboe Cc: "Jason A. Donenfeld" , "Kirill A. Shutemov" , Andi Shyti , Chengming Zhou , Christian Brauner , Christophe Leroy , Dan Carpenter , David Airlie , David Hildenbrand , Hao Ge , Jani Nikula , Johannes Weiner , Joonas Lahtinen , Josef Bacik , Masami Hiramatsu , Mathieu Desnoyers , Miklos Szeredi , Nhat Pham , Oscar Salvador , Ran Xiaokai , Rodrigo Vivi , Simona Vetter , Steven Rostedt , Tvrtko Ursulin , Vlastimil Babka , Yosry Ahmed , Yu Zhao , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv3 10/11] mm/vmscan: Do not demote PG_dropbehind folios Date: Thu, 30 Jan 2025 12:00:48 +0200 Message-ID: <20250130100050.1868208-11-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250130100050.1868208-1-kirill.shutemov@linux.intel.com> References: <20250130100050.1868208-1-kirill.shutemov@linux.intel.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 PG_dropbehind flag indicates that the folio need to be freed immediately. No point in demoting it. Signed-off-by: Kirill A. Shutemov --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 4bead1ff5cd2..4f86e020759e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1231,7 +1231,7 @@ static unsigned int shrink_folio_list(struct list_head *folio_list, * Before reclaiming the folio, try to relocate * its contents to another node. */ - if (do_demote_pass && + if (do_demote_pass && !folio_test_dropbehind(folio) && (thp_migration_supported() || !folio_test_large(folio))) { list_add(&folio->lru, &demote_folios); folio_unlock(folio);