From nobody Fri Oct 3 16:38:21 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12CA833CEAF; Thu, 28 Aug 2025 17:12:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756401171; cv=none; b=dXLx7bJ9/VQ1rU6CjAD30JZB/JP/heNeOe/Ntb+rH4P6KbJRTXhYZm4DbJ0+HvAdlikGF5gFOChqwG0k0Ib1NHIGvTFIkq3Y/a38XxILoEyzhCrR6O7aAyX4progq9gaSSMwn5nJh+ydFIo2wioXZjt3W74aI23V3glDfBGJtX4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756401171; c=relaxed/simple; bh=fYhqOdJk8g7Kx4IsyLnZ52pSMGRQylBDNBv4D4Pqc2E=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=p5LT1knze+F6wM56/OrylZO4gXiXs+Hk8S4qxfQk4rxJXKEMqpwghhwUizShn4DBE74c0DbXcIUDd0MEtTpJMTwIiT5v4+vGyRhA+5qUwKATW9nRWkx6SsrGLV0TGyTGXLIxxZYxqX0hj5cvXkH8HsDT9OVxV/yAkW79YELhByE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=E6ZWd3xP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="E6ZWd3xP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6EAC6C4CEF9; Thu, 28 Aug 2025 17:12:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756401170; bh=fYhqOdJk8g7Kx4IsyLnZ52pSMGRQylBDNBv4D4Pqc2E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E6ZWd3xPefENCDvxLUzYqof2Vqp7XK2zl+1MsWwPTYSiCWpjFxzhsxx3HgoYntLd3 KKs80tvDNSYseHgdp4uYx96ZzbbpYJSlJecQaVqV63H0YsIJ1BDp0e6ryZvWuNXpW0 zYxzih8BYLXwpN8Cw2Oa6yWhGH7R7CvoIbOqZFT19Ez0nbgRiBrMor49k9eR8TeYvL Cd/dlw2ZYG6FyuMmrNLl3SaPNnhqyt44NSiCM25b+Zj751sI6Qsp3/fg+r74+/t72u q1YDFa+BHVyU3VbzgDt0GI1Y0IfgyUda78LGuwojc6SkRehc1K9GsfIvddbIe0ztzR fqTUmMnayD8SA== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Quanmin Yan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, wangkefeng.wang@huawei.com, zuoze1@huawei.com Subject: [PATCH v3 03/11] mm/damon/paddr: support addr_unit for DAMOS_PAGEOUT Date: Thu, 28 Aug 2025 10:12:34 -0700 Message-Id: <20250828171242.59810-4-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250828171242.59810-1-sj@kernel.org> References: <20250828171242.59810-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support of addr_unit for DAMOS_PAGEOUT action handling from the DAMOS operation implementation for the physical address space. Signed-off-by: SeongJae Park Signed-off-by: Quanmin Yan Reviewed-by: SeongJae Park --- mm/damon/paddr.c | 30 +++++++++++++++++++++++------- 1 file changed, 23 insertions(+), 7 deletions(-) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index d497373c2bd2..696aeb0f6c8e 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -24,6 +24,19 @@ static phys_addr_t damon_pa_phys_addr( return (phys_addr_t)addr * addr_unit; } =20 +static unsigned long damon_pa_core_addr( + phys_addr_t pa, unsigned long addr_unit) +{ + /* + * Use div_u64() for avoiding linking errors related with __udivdi3, + * __aeabi_uldivmod, or similar problems. This should also improve the + * performance optimization (read div_u64() comment for the detail). + */ + if (sizeof(pa) =3D=3D 8 && sizeof(addr_unit) =3D=3D 4) + return div_u64(pa, addr_unit); + return pa / addr_unit; +} + static void damon_pa_mkold(phys_addr_t paddr) { struct folio *folio =3D damon_get_folio(PHYS_PFN(paddr)); @@ -135,10 +148,11 @@ static bool damon_pa_invalid_damos_folio(struct folio= *folio, struct damos *s) return false; } =20 -static unsigned long damon_pa_pageout(struct damon_region *r, struct damos= *s, +static unsigned long damon_pa_pageout(struct damon_region *r, + unsigned long addr_unit, struct damos *s, unsigned long *sz_filter_passed) { - unsigned long addr, applied; + phys_addr_t addr, applied; LIST_HEAD(folio_list); bool install_young_filter =3D true; struct damos_filter *filter; @@ -159,8 +173,8 @@ static unsigned long damon_pa_pageout(struct damon_regi= on *r, struct damos *s, damos_add_filter(s, filter); } =20 - addr =3D r->ar.start; - while (addr < r->ar.end) { + addr =3D damon_pa_phys_addr(r->ar.start, addr_unit); + while (addr < damon_pa_phys_addr(r->ar.end, addr_unit)) { folio =3D damon_get_folio(PHYS_PFN(addr)); if (damon_pa_invalid_damos_folio(folio, s)) { addr +=3D PAGE_SIZE; @@ -170,7 +184,7 @@ static unsigned long damon_pa_pageout(struct damon_regi= on *r, struct damos *s, if (damos_pa_filter_out(s, folio)) goto put_folio; else - *sz_filter_passed +=3D folio_size(folio); + *sz_filter_passed +=3D folio_size(folio) / addr_unit; =20 folio_clear_referenced(folio); folio_test_clear_young(folio); @@ -189,7 +203,7 @@ static unsigned long damon_pa_pageout(struct damon_regi= on *r, struct damos *s, applied =3D reclaim_pages(&folio_list); cond_resched(); s->last_applied =3D folio; - return applied * PAGE_SIZE; + return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit); } =20 static inline unsigned long damon_pa_mark_accessed_or_deactivate( @@ -302,9 +316,11 @@ static unsigned long damon_pa_apply_scheme(struct damo= n_ctx *ctx, struct damon_target *t, struct damon_region *r, struct damos *scheme, unsigned long *sz_filter_passed) { + unsigned long aunit =3D ctx->addr_unit; + switch (scheme->action) { case DAMOS_PAGEOUT: - return damon_pa_pageout(r, scheme, sz_filter_passed); + return damon_pa_pageout(r, aunit, scheme, sz_filter_passed); case DAMOS_LRU_PRIO: return damon_pa_mark_accessed(r, scheme, sz_filter_passed); case DAMOS_LRU_DEPRIO: --=20 2.39.5