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b=ppLexMirhSeD9E+SCsqA39/jd0rc9uOgTn8XQSvvohheJ4uFm1wYys1uncpVtJJdJ ZfQXviR97WUSVWsXSAmIpJejuiuTNgy+IEyjQhEbYok5qXsEu7FOXfKzT4JGuSmESU E2afXBz6oCWTqdKUQuzRKRMSpw7PnOgdxEmsnlHFtys3wYOD7hTS3S44J25Tsbz40C VjX0TUn/Sm8QK1k2sBHwGU37CjpBSo/oEMH5v01E1M97S5jpbERbTYCWwQXadfwQpE DVfSRlzEp2zVwliP4CJubiVlO9zLbylhoUV2ylJNemGyKZIEoczNgm4ARSrqBkiP8W 5xAadZlukYt1Q== 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 04/28] mm/damon/core: commit probes Date: Tue, 12 May 2026 07:36:19 -0700 Message-ID: <20260512143645.113201-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260512143645.113201-1-sj@kernel.org> References: <20260512143645.113201-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 385AC40004 X-Stat-Signature: kkxmb5gw5waxfw8kre3qyjc5xuqu8ca4 X-Rspam-User: X-HE-Tag: 1778596619-749215 X-HE-Meta: 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 Dy+HZk/6 ZwYneas4+XiZHHWrBAYwY69aoY623g+glPVjhvWnlT/eUOKkQu1Xjnu7sTcqc5tnw0qDLesLWDoY2W42XU3cpgQBodgDrYzckDHUeCtp8y0knNAiFjd+0Vhs605iSiJyXnT8hLMfBm1T0GzgOpcfa4csyNbz1LfAkm+COGgbzJNChUumejAYu584Q4T/ANBnoItJUH8yiw+zcHUaRoSd66N4n52CRyvbpkS4pOalkT7N4vBw= 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 d01417955a3b4..240cae1420c12 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -133,11 +133,34 @@ 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; @@ -175,6 +198,18 @@ 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) { @@ -1386,6 +1421,72 @@ 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. @@ -1442,6 +1543,9 @@ 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