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[172.10.233.147]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66fb48b374bsm12096623d50.3.2026.09.09.03.10.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 03:10:22 -0700 (PDT) Date: Wed, 9 Sep 2026 03:10:17 -0700 (PDT) From: Hugh Dickins To: Andrew Morton cc: Ackerley Tng , Alexander Viro , Alexandre Ghiti , Baolin Wang , Barry Song , Binbin Wu , Christian Brauner , Christoph Hellwig , Christoph Lameter , Claudio Imbrenda , David Hildenbrand , JP Kobryn , Jan Kara , Jens Axboe , Johannes Weiner , Kairui Song , Kiryl Shutsemau , Lance Yang , Leonardo Bras , Lorenzo Stoakes , Marcelo Tosatti , Matthew Wilcox , Mel Gorman , Miaohe Lin , Michal Hocko , Minchan Kim , Muchun Song , Oscar Salvador , Peter Zijlstra , Qi Zheng , Rik van Riel , Sebastian Andrzej Siewior , Shakeel Butt , Suren Baghdasaryan , Vlastimil Babka , Yang Shi , Yu Zhao , Zach O'Keefe , Zi Yan , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 14/26] mm/fbatch: no lru_add_drain() nor _all() for memfd_wait_for_pins() In-Reply-To: Message-ID: <5b393933-b097-9d70-be09-2d00c8d62f6b@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII memfd_tag_pins() used lru_add_drain(), memfd_wait_for_pins() then used lru_add_drain_all(): remove those calls, no longer useful now that the per-cpu fbatch references are gone. Signed-off-by: Hugh Dickins --- mm/memfd.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/mm/memfd.c b/mm/memfd.c index c708d92533f4..064f24dcddaa 100644 --- a/mm/memfd.c +++ b/mm/memfd.c @@ -40,8 +40,6 @@ static void memfd_tag_pins(struct xa_state *xas) struct folio *folio; int latency = 0; - lru_add_drain(); - xas_lock_irq(xas); xas_for_each(xas, folio, ULONG_MAX) { if (!xa_is_value(folio) && memfd_folio_has_extra_refs(folio)) @@ -168,9 +166,7 @@ static int memfd_wait_for_pins(struct address_space *mapping) if (!xas_marked(&xas, MEMFD_TAG_PINNED)) break; - if (!scan) - lru_add_drain_all(); - else if (schedule_timeout_killable((HZ << scan) / 200)) + if (scan && schedule_timeout_killable((HZ << scan) / 200)) scan = LAST_SCAN; xas_set(&xas, 0); -- 2.51.0