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b=UxGQuFi+56gUrbDHVKPXs43VOxdya1Luqh1HeFxSpNC80syWtNsjRod7vsh0Wo2WX HUv1IU7w3c4TuyxRhs9tvfOXiMAJWSEoNn+PbFJcnRfH9TO56WvA/9w/Ig3mKrmpjg O13c6Vo82grMUU9qJkIX81Wi6O9zRStciEOObMIE5Kkyrp20NaI0HRJoMSgx36aEXa D3vUuTOQleM1h5p1/Qw+gO7ZOk9W2agKzkzPYqScmpFj2u0jQTkOKUdicqf+qHrjXZ mpM1NJlXFJWX8T3EJKGAs6kgovzm34R7Y8dmAiWAlY0km6mnaPtal8w/1p6e3kbHF+ DFoISSHaeyFmQ== From: "Barry Song (Xiaomi)" To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: axelrasmussen@google.com, david@kernel.org, hannes@cmpxchg.org, kasong@tencent.com, linux-kernel@vger.kernel.org, ljs@kernel.org, lyugaofei@xiaomi.com, mhocko@kernel.org, qi.zheng@linux.dev, shakeel.butt@linux.dev, stevensd@chromium.org, weixugc@google.com, yuanchu@google.com, chenridong@xiaomi.com, zhangbo56@xiaomi.com, wangzicheng@honor.com, lianux.mm@gmail.com, "Barry Song (Xiaomi)" Subject: [RFC PATCH v3 6/6] mm: mglru: run aging if the preferred type has no folios in reclaimable gens Date: Fri, 31 Jul 2026 16:38:43 +0800 Message-Id: <20260731083843.37811-7-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260731083843.37811-1-baohua@kernel.org> References: <20260731083843.37811-1-baohua@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 237D880005 X-Rspam-User: X-Stat-Signature: z7a98nsh91aehkp56xxdd74b347dyidq X-Rspamd-Server: rspam04 X-HE-Tag: 1785487164-967501 X-HE-Meta: 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 9O2Dpi7d 3xDPSYPdsSm49CYdohTg3Ql49jJPGObuSb2wE9WlCKnCb+vkT2SKEfGr06YBZsaGu1NYKm9R24Kq+C8W0xFLXvVk1X0LIYPsOKTQQNDFZ1feY3l4nNsTnnqgePTeZ18W45BmIoYs7vo+GgiOHmpTUiwch5R/fI7GVBT5G3Jr/C1frGTkSeIQq2dbJavpxJzUvddsSDj9yPcVsI4hrIGJ16pYpiVF+TZkMHS1IMAWj2p1dM59RtvskyZoVeHVP+j3LwGPIohIXHm1fH3iHO336xTRh+3tvolXlWZQtYKqybZ1DyDVZn15V7FE3qQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Respect the type selected by positive_ctrl_err(). If there are no reclaimable generations left for that type, run aging. For balanced swappiness values near the middle, still allow gentle reclaim since the swappiness bias is less of a concern, while the slightly increased aging overhead might become a problem. Signed-off-by: Barry Song (Xiaomi) --- mm/vmscan.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index 98fd2fac90ac..902d85afc5f6 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -5035,6 +5035,10 @@ static bool should_run_aging(struct lruvec *lruvec, unsigned long max_seq, if (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS > max_seq) return true; + /* run aging if the preferred type is exhausted for extreme swappiness */ + if (min_seq[type] + MIN_NR_GENS > max_seq && !swappiness_is_balanced(swappiness)) + return true; + /* try to avoid aging, do gentle reclaim at the default priority */ if (sc->priority == DEF_PRIORITY) return false; -- 2.34.1