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bh=j8SWQuWvWu2mDr3ZPa1cO5y8fbw9Oppo9ANwQ11kECE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MA8n1J11Q+N453pKNit7qsK5N8m3xsD/WiHIm1bYiUNfAtBL9TJl+eMtw24ru5EL1 cakIWDwPlXCptF4UsAX7P5KTwmIqBh8OFy8A+bZZqFTdCvXZWWe70HoAOQ5Iv0EvZy jlMOBWy17LWZDIYp93GDUXP1Y4oRawKlOVvORwqK+JzNm+JA2VpM53CLmpsUTpKY2h y6GND+wLVryqKyy2rzfGkY2Mx9s6y/n3mJny+1vKjLQTFVZfl+//WovOqdLPeKnD0z 6iNCX/b2scJnYCJTW/DDxobJBZ/Qx5/4Dvs6eMLiPC9xtzxyt1TexVX+zKMGC5tJ5k GT8FS3GM9Huiw== From: SJ Park To: Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.2 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Thu, 10 Sep 2026 18:13:22 -0700 Message-ID: <20260911011330.93678-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 53C25C0008 X-Stat-Signature: fwp4fgpa4amcqfnymhm6da3f8ejz7fwp X-Rspam-User: X-HE-Tag: 1789089219-174590 X-HE-Meta: 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 13WyMaR2 yHjrO0T4UPoFledAHGGb2sO9OnfFzhz4Foy4nwy/6/f8voBOmMZyf7mo0gECplxLC3THphdyMrA3DsEhbI0gCI/+6Zl/VqrFAP7YrwUm0coH7Dz24PBEqj4W6Iiy0+ZmN8NSH2GamAHqe5kfBp+JdL4gAJPomMCKQYEQ+aoYTsBB1O0UdrhnEhdEbK91jP/H0gVHt77+uZuEDnV+nXxPn4PPUNq4w0ZFiMvUk3HUu4NqA/8sq8cag0fFbyAPUC006BwPgW57SLzNygm31RKOELwlLefhODZdKtqZTMrTeRlWHRZ4EHpwD8BvKN26P1+DXDahqTcdHemQph2AoKIKfrhwM+L2zYvtvDpLt Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Update DAMON kernel API to introduce new DAMOS core filter type, PROBE_HITS_WSUM. It will allow API callers to describe the DAMOS action target regions based on their probe_hits weighted sum. For describing the filtering target weighted sum range, add two type-dependent union fields to damos_filter. Signed-off-by: SJ Park --- include/linux/damon.h | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..ef99ff778ae10 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,14 +399,15 @@ struct damos_stat { * @DAMOS_FILTER_TYPE_UNMAPPED: Unmapped pages. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. + * @DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: probe_hits weighted sum range. * @NR_DAMOS_FILTER_TYPES: Number of filter types. * - * All types except &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET - * are handled by the underlying &struct damon_operations as a part of scheme - * action trying, and therefore accounted as 'tried'. In contrast, - * &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET filters are handled - * by the core layer before trying of the action, and therefore not accounted - * as 'tried'. + * All types except &DAMOS_FILTER_TYPE_ADDR, &DAMOS_FILTER_TYPE_TARGET and + * &DAMOS_FILTER_TYPE_PROBE_HITS_WSUM are handled by the underlying &struct + * damon_operations as a part of scheme action trying, and therefore accounted + * as 'tried'. In contrast, &DAMOS_FILTER_TYPE_ADDR and + * &DAMOS_FILTER_TYPE_TARGET filters are handled by the core layer before + * trying of the action, and therefore not accounted as 'tried'. * * Support for the operations-handled filters depends on the running * &struct damon_operations. @@ -420,6 +421,7 @@ enum damos_filter_type { DAMOS_FILTER_TYPE_UNMAPPED, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, + DAMOS_FILTER_TYPE_PROBE_HITS_WSUM, NR_DAMOS_FILTER_TYPES, }; @@ -434,6 +436,8 @@ enum damos_filter_type { * &damon_ctx->adaptive_targets if @type is * DAMOS_FILTER_TYPE_TARGET. * @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE. + * @range_min: Minimum value of range arguments. + * @range_max: Maximum value of range arguments. * * Before applying the &damos->action to a memory region, DAMOS checks if each * byte of the region matches to this given condition and avoid applying the @@ -450,6 +454,10 @@ struct damos_filter { struct damon_addr_range addr_range; int target_idx; struct damon_size_range sz_range; + struct { + unsigned long range_min; + unsigned long range_max; + }; }; /* private: */ /* List head for siblings. */ -- 2.47.3