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Wed, 8 Apr 2026 16:12:51 +0800 (CST) Received: from huawei.com (10.50.87.63) by dggpemf500012.china.huawei.com (7.185.36.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 8 Apr 2026 16:12:51 +0800 From: Lin Ruifeng To: , , , CC: , , Subject: [PATCH] mm/damon: support freeze kdamond Date: Wed, 8 Apr 2026 16:06:52 +0800 Message-ID: <20260408080652.1745410-1-linruifeng4@huawei.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.87.63] X-ClientProxiedBy: kwepems200001.china.huawei.com (7.221.188.67) To dggpemf500012.china.huawei.com (7.185.36.8) X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 5F85BA0006 X-Stat-Signature: xh99ipfzr53ktrppuh6tw98stnghwr7w X-Rspam-User: X-HE-Tag: 1775635976-957709 X-HE-Meta: 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 UYLg23m5 aeNblFYwB0j5LlObPe5BGQTdhtNoNeh//C+Wsckj/7HerC+LCsvmKNAKKC6KyhHOshQVOMFW6i0Y0F7EEYbpHVFoXVSZjpLNxyylMJRlEqr1J5P0afe0/S1ZCIjW4hBTWf4uRw1BNJ/BbRWljqAlWn7oIGxC+LNOJZ4dy493dqKeUlTz0kQUT7qV0K1TeRl1H82VEuqGpQZ5Hff83h4fefy69yCGV8LyqZoc0RSrm/IBDrRYD9iKc2ot6Ws9Bk+AaRb7dJj8jjzQ/9dcmqG1FW9Q2mf1VRr9uyMWNbh7iCv1KXoSKRetMidDEBXWcAQJijNAYgKBDGNSir9qrv4cimLPrtoFtbqweuEkT8gaCzuKG0sg= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: During suspend and resume, the data monitored by kdamond is no longer meaningful. Meanwhile, since kdamond may involve I/O operations, it is necessary to freeze it. Signed-off-by: Lin Ruifeng --- mm/damon/core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index 3e1890d64d06..5cd1f0aed66b 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -16,6 +16,7 @@ #include #include #include +#include #define CREATE_TRACE_POINTS #include @@ -2753,6 +2754,7 @@ static int kdamond_fn(void *data) complete(&ctx->kdamond_started); kdamond_init_ctx(ctx); + set_freezable(); if (ctx->ops.init) ctx->ops.init(ctx); @@ -2774,6 +2776,8 @@ static int kdamond_fn(void *data) unsigned long next_ops_update_sis = ctx->next_ops_update_sis; unsigned long sample_interval = ctx->attrs.sample_interval; + try_to_freeze(); + if (kdamond_wait_activation(ctx)) break; -- 2.43.0