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b=SDQJoe1NFwHYqANaMOcCpJgaKxKqgUOOQFcaHK+dQDBzj62M2kqwbRu7YI4QitFf3 63l7CpBP7+tA7bhepE122ngllyQHBSstJ78Zg9v5v+3soPmmbQTQlNDix+guqzZIwO Tmq70z1SV+5T0Co9FVYXpvu3PCfrX3gM6V1vC44viR2SjLBat6ZSBv+FiAlPojytMQ /OlnA1g1WkSBbENnbAiR+tdtHyCneE+SiVkYq9wGTlIESAmfOPC5Si3jb69Dudw5AA vxnw91V5zasqUR/fp6yDLfWZGDnvbwSQHMG1sEQZ18zpODH7bUp+FkBb87McGC7RDu r8rKzWNedcTeA== 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 04/19] mm/damon/core: commit probes Date: Sun, 26 Apr 2026 13:52:05 -0700 Message-ID: <20260426205222.93895-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260426205222.93895-1-sj@kernel.org> References: <20260426205222.93895-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 0896A18000B X-Stat-Signature: k5jeyfzit1ywadj51to43r99rwigfnhd X-Rspam-User: X-HE-Tag: 1777236756-5186 X-HE-Meta: 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 CMcieHNb sIvaPle0rnbF57VrdYyQ6NgeyC4QizQ3h9BSv3rUH1g/kgwXsuAjn0eSQ92mYejndU3hcQ7iZGxyyqtlb/yPTW2ncDTl0H7hrHMy6zkNtLNMlCjKFL/wKWNz4i+2M2B5E9L1CAOuH37HyiVRDg8iguUZAul76KDyPeAzAvB/4M9hv7Qu50ua4K5QufVDQxwZS22G48zopLUmPacVjVy6PYm1e3R8gBqOoDaS8XXaMPOuzieE= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 170abba8fdf2a..2ab1d6dd47da4 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) { @@ -1412,6 +1447,72 @@ 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. @@ -1453,6 +1554,9 @@ int damon_commit_ctx(struct damon_ctx *dst, struct damon_ctx *src) } dst->pause = src->pause; 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