From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 859BB357D1A; Fri, 15 May 2026 00:44:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778805888; cv=none; b=ezuuTg301sS+ZXgxLLwIICxfCfRNdQErmPKa7tPmR2MFGsY0wvuVxfFeEtEWoz1Njb2oUo5RIn7Lf0m2fAFMpg7k9ak4bPugI//XbxNVmd4Q4GvZzsMxPfOo8tV1vSXkVJ09d9uNVub0qOHpkfN30kOn8yXOPAi/Atu0dfipBqU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778805888; c=relaxed/simple; bh=V8jJ5epB+GwJSdNuM2GEIbS33YAdZRISnffFQmMwTmE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=L/NKBj/yWHL7eCxKz2X+rgvtdIYA08CdleO+HbojGRa2ydkevz0RR2YlcZJqtpUDqAPwO0CnTuD9Wkc8G4CVgZYVj5iBeV3MURuQk+9TXVhwyzrWQ5Fw7XbbXyHC3OcNGpGjwS+cjU9laQX7p4XdSqG640ar5NAOe8HsFKVt6SY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DEag+6Bh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DEag+6Bh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D9C6C2BCC7; Fri, 15 May 2026 00:44:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778805887; bh=V8jJ5epB+GwJSdNuM2GEIbS33YAdZRISnffFQmMwTmE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DEag+6BhvYJSw028G0t8O1d7yqMVKyRpjB5E1/J++lmoTA6dpKdJ7GA+oy55g7Uzt P36DjO9aKIfGSOHQO02aTSTwlbYPGqdIb4o27ZP35TqAqYVrYqZzKVvBlJdGoqUouj djw/KLj7Pz0GEzKb3FEUMg6jRShh4QzrXGCybNfyAg7Y/ON5A73IUmyQT6n1+9zaTt 8JPHmzr2j3QxMqfiDVY7XK6N10BiSiAbTPFLIQD0SWxxKjMgIbE+V6hYxPF8rwyomp NyfMWJz8PEejdzfsE31a6iVkn8H2mTkEOfsWTKT7T4ZphdoDaTXREaS7Zl464B8sil Fk3x1WDrDjGlg== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.2 04/28] mm/damon/core: commit probes Date: Thu, 14 May 2026 17:44:05 -0700 Message-ID: <20260515004433.128933-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Update damon_commit_ctx() to commit installed data probes, too. Signed-off-by: SeongJae Park --- mm/damon/core.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index 44943d654dcce..15f2795a1156f 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -129,11 +129,34 @@ void damon_add_filter(struct damon_probe *p, struct damon_filter *f) list_add_tail(&f->list, &p->filters); } +static void damon_del_filter(struct damon_filter *f) +{ + list_del(&f->list); +} + static void damon_free_filter(struct damon_filter *f) { kfree(f); } +static void damon_destroy_filter(struct damon_filter *f) +{ + damon_del_filter(f); + damon_free_filter(f); +} + +static struct damon_filter *damon_nth_filter(int n, struct damon_probe *p) +{ + struct damon_filter *f; + int i = 0; + + damon_for_each_filter(f, p) { + if (i++ == n) + return f; + } + return NULL; +} + struct damon_probe *damon_new_probe(void) { struct damon_probe *p; @@ -171,6 +194,18 @@ static void damon_destroy_probe(struct damon_probe *p) damon_free_probe(p); } +static struct damon_probe *damon_nth_probe(int n, struct damon_ctx *ctx) +{ + struct damon_probe *p; + int i = 0; + + damon_for_each_probe(p, ctx) { + if (i++ == n) + return p; + } + return NULL; +} + #ifdef CONFIG_DAMON_DEBUG_SANITY static void damon_verify_new_region(unsigned long start, unsigned long end) { @@ -1378,6 +1413,72 @@ static int damon_commit_targets( return 0; } +static void damon_commit_filter(struct damon_filter *dst, + struct damon_filter *src) +{ + dst->type = src->type; + dst->matching = src->matching; + dst->allow = src->allow; +} + +static int damon_commit_filters(struct damon_probe *dst, + struct damon_probe *src) +{ + struct damon_filter *dst_filter, *next, *src_filter, *new_filter; + int i = 0, j = 0; + + damon_for_each_filter_safe(dst_filter, next, dst) { + src_filter = damon_nth_filter(i++, src); + if (src_filter) + damon_commit_filter(dst_filter, src_filter); + else + damon_destroy_filter(dst_filter); + } + + damon_for_each_filter_safe(src_filter, next, src) { + if (j++ < i) + continue; + + new_filter = damon_new_filter(src_filter->type, + src_filter->matching, src_filter->allow); + if (!new_filter) + return -ENOMEM; + damon_add_filter(dst, new_filter); + } + return 0; +} + +static int damon_commit_probes(struct damon_ctx *dst, struct damon_ctx *src) +{ + struct damon_probe *dst_probe, *next, *src_probe, *new_probe; + int i = 0, j = 0, err; + + damon_for_each_probe_safe(dst_probe, next, dst) { + src_probe = damon_nth_probe(i++, src); + if (src_probe) { + err = damon_commit_filters(dst_probe, src_probe); + if (err) + return err; + } else { + damon_destroy_probe(dst_probe); + } + } + + damon_for_each_probe_safe(src_probe, next, src) { + if (j++ < i) + continue; + + new_probe = damon_new_probe(); + if (!new_probe) + return -ENOMEM; + damon_add_probe(dst, new_probe); + err = damon_commit_filters(new_probe, src_probe); + if (err) + return err; + } + return 0; +} + /** * damon_commit_ctx() - Commit parameters of a DAMON context to another. * @dst: The commit destination DAMON context. @@ -1418,6 +1519,9 @@ int damon_commit_ctx(struct damon_ctx *dst, struct damon_ctx *src) return err; } dst->ops = src->ops; + err = damon_commit_probes(dst, src); + if (err) + return err; dst->addr_unit = src->addr_unit; dst->min_region_sz = src->min_region_sz; -- 2.47.3