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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: oqhq9xwc9hzbqqqgh39bssampt697xfs X-Rspam-User: X-Rspamd-Queue-Id: 10DF640002 X-Rspamd-Server: rspam07 X-HE-Tag: 1778805887-114531 X-HE-Meta: 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 4gRPIw/x tIo5B5Je1oeC7xXKyBbySNdsyYXYSQTAEcFjnpXBoSpkpObeG9t9LZbDx3anmYYJOf8bd1w0sitYpPeWM8USxveHz9/pu4PEEBG9y0iCd9PKK7rzM8YlNj4Kp33VtgVnUAEt5TEL/Mq7PjtJnJtiL6k+J4SfS1aVSUmLB5dj1vAwqK0QbKPttSBTwvKo9QaJ4ZtgpP1yP1MjWgd5HE85zrxobt9mU6sHoJTsBv4RI5GXAD+c= 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 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