From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793478383; b=lTrsgthYRLTjKcOvWVih9IYdcNQe8xUuX8Eea5hAhGXsWEZrsnoI/ttmAFVm3Y+lO9KY XUU/X8LjQJMtVWFH5jo0vwMfU5Sza2mpVLgFF09AduyfS75SynMNRZ25vd9HUJO/jgRnL EZuXfErB8BRkkmiThg0l4jplQhkCJYWeXC+AJFi95re/0Fb2jWh5/h9nYRu5F51oSrQHk 4N8PSDT7N11pqYkHacRU9UMqzEJLui4qJ8urvjNwo9kK2Uky2lsHWbLR64Jt4tlQrXgfo v/D1+CeC65T38HjJMOTX7g1UY41QO8UzRz+bLQ4Xwy45m8++THMFy9nGVjpB6AmSubA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793478383; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=kOWWL3M+VZ5r98aKn5hrniliEJVp1VQubbGhe+wLkOI=; b=T04OkkFx/8M6LrwzGhYqgHxnpxfVjo4lSsx8a/Kh0bzaCUfVU3Xk5qdOPbC+3qPyUrGk iixC6Nb2nEmZbh+WuOL9FY+oKJpwbZMUDDNWEVYi3UF6neOmTFqqw1IdpwxwGeAVX9zCu j/7N72nzYJGDgVKJJlLuL+5A6byA/+YPev7cdJc3YoFgFdLZtldyy0J/+iENfcF8ma4p3 jvT1GTYDKY1cMyeJsqSuXr/+sxKmDhe4m4ISysjnbIuHBmAy4pcxdR2IoYq1OupWA5h/n uYOXQUqLvzXRLCNx5hOeRA5e6xYMjXe8+3SOv/vCUhOwmbEK6V0QXH5vLzKIjOxgLCg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=RwUuj8bJ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68037606A323; Sat, 31 Oct 2026 20:26:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=RwUuj8bJ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16F9B1F00A15; Sat, 31 Oct 2026 20:26:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793478383; bh=kOWWL3M+VZ5r98aKn5hrniliEJVp1VQubbGhe+wLkOI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RwUuj8bJhrOGolYSTqKBJpONRcCmYDmwI/dbDHKggPP3UnwuRI1Whwuv/2KWvgDgj OKnKP3ulpyV5d7iqrRdeWpE5RimU6BKA8uPisfPOUx8TqfFhPOOVsN7rw9dbPoxSbb T3RLoE5bLCIo1geXJMPfW/HUGza3al88kA5YbokU0d98ZYQeSbi+RY/++2uRgKbuJf BR1VIImWdvjeA3lwElWJ7DGVrToZRyDOytPnABYUhiuHhz8sQPXfXVXuYatfvdiZxK ivSJgz3VwyJX4pa604MJW85gSZh7c+yuRu0Kd+lQ8hVmWeOZoQLUMAyHGf0SS67PH1 WRMNkItbY50zA== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 3/6] mm/damon/vaddr: implement sz_filter_passed for migrate_{hot,cold} action Date: Sat, 31 Oct 2026 13:26:10 -0700 Message-ID: <20261031202614.96036-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261031202614.96036-1-sj@kernel.org> References: <20261031202614.96036-1-sj@kernel.org> X-Mailing-List: damon@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Support of DAMOS ops filter and sz_filter_passed support is up to each operation set. DAMON_VADDR supports both for only damos_stat action. It intentionally does not support those for madvise-based actions because applying filters could make it unnecessarily complicated and expensive. The vaddr implementation of migrate_{hot,cold} action does support DAMOS ops filters but sz_filter_passed. There is no real reason to not support sz_filter_passed. Add the support. Pass the sz_filter_passed pointer to the filter applying logic and accumulate the number. Closes: https://sashiko.dev/#/bug/linux-986e8b64-8e65-4e32-970f-4d3ebdf8206e Signed-off-by: SJ Park --- mm/damon/vaddr.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index c271b6d63c027..112095c2d53fd 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -776,6 +776,7 @@ static bool damos_va_filter_out(struct damos *scheme, struct folio *folio, struct damos_va_migrate_private { struct list_head *migration_lists; struct damos *scheme; + unsigned long *sz_filter_passed; }; /* @@ -840,6 +841,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, struct damos_va_migrate_private *priv = walk->private; struct list_head *migration_lists = priv->migration_lists; struct damos *s = priv->scheme; + unsigned long *sz_filter_passed = priv->sz_filter_passed; struct damos_migrate_dests *dests = &s->migrate_dests; struct folio *folio; spinlock_t *ptl; @@ -858,6 +860,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, goto huge_out; if (damos_va_filter_out(s, folio, walk->vma, addr, NULL, pmd)) goto huge_out; + *sz_filter_passed += folio_size(folio); damos_va_migrate_dests_add(folio, walk->vma, addr, dests, migration_lists); huge_out: @@ -885,6 +888,7 @@ static int damos_va_migrate_pmd_entry(pmd_t *pmd, unsigned long addr, nr = folio_nr_pages(folio) - page_idx; if (damos_va_filter_out(s, folio, walk->vma, addr, pte, NULL)) continue; + *sz_filter_passed += folio_size(folio); damos_va_migrate_dests_add(folio, walk->vma, addr, dests, migration_lists); } -- 2.47.3