From nobody Tue Feb 10 04:13:27 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (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 E75C7208A4 for ; Mon, 19 Aug 2024 02:16:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724033785; cv=none; b=pzoF9XyW6e9L5BzfXiOjW6G1zIL5nHI1tygMJZrTcbv2NOPk8qXVwSCeJ+nl8U+Dj5AHFzxE+Q9kXv1Nu/WMHEPSrLapnYiJ2QSNTfGE/HYY1q6tXpTxm7umCfVJoQRQl3PQaafFXjsLYUPRpq0zKDTtGmJH5T7thWl6eJfyVds= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724033785; c=relaxed/simple; bh=i9i0GU1tqbl+gZG9rdF1xrCDy8bSikrdWFFB2p3UFUw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=n1xdH/L6xolWQ3SSwTI1BDno0ySVGJjPSuxWUzAXOE8qt3RW6lvHngDdTUN/L0fR3SxFkfxOMCgGV8U44GYzN+bu52CiNNfrVzy4OkG9DEYtEqRxkymj68P1snFk3AJFhE7ZvF0wVMtxBv1bZd27BR1gwoc336tBakV4I8nsfVM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=n8+ZbJkw; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="n8+ZbJkw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724033784; x=1755569784; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=i9i0GU1tqbl+gZG9rdF1xrCDy8bSikrdWFFB2p3UFUw=; b=n8+ZbJkwIVZqGnxMaQ1Ip5KPL4n4+9mrj2IEcSrOhsL6EfKGV/4eI68T Gg8m4A4j/2puc9F6V9kAiKtpoeT3C/DmeH0kBm9c/5NS5Ulsy0KqIh5rt VY0AL+it8/ihygE4JfOOBOWpOM/9zTZbC0MMxSsrRQf78NaZ+GT9xG1pD HFNllmOjlp3VIGFGfRRoosFwnjcaPkIO6YDK0ZsAZX6JyzRDmmARCdga2 fGOHd/j0gRclDCd6RCXsxysYP/gYRX4XUiArYtKNudNcL12IWKmqTXHKL AIKeqkzh4Fzm2Un98XCpd3gqFhXHFdf7qfXcr01eQHIrCvssTyc3nhqRt g==; X-CSE-ConnectionGUID: cRZ2sW0iTZK3P5Oq2KvhiA== X-CSE-MsgGUID: J0WMNWvySDysrcSe2UAHcw== X-IronPort-AV: E=McAfee;i="6700,10204,11168"; a="44782958" X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="44782958" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2024 19:16:23 -0700 X-CSE-ConnectionGUID: wUHvjw1jTIGDkmypoq16Tw== X-CSE-MsgGUID: R4qRuZDVT/aLemdFg0NPEQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,158,1719903600"; d="scan'208";a="64610270" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.6]) by fmviesa005.fm.intel.com with ESMTP; 18 Aug 2024 19:16:21 -0700 From: Kanchana P Sridhar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hannes@cmpxchg.org, yosryahmed@google.com, nphamcs@gmail.com, ryan.roberts@arm.com, ying.huang@intel.com, 21cnbao@gmail.com, akpm@linux-foundation.org Cc: nanhai.zou@intel.com, wajdi.k.feghali@intel.com, vinodh.gopal@intel.com, kanchana.p.sridhar@intel.com Subject: [PATCH v4 1/4] mm: zswap: zswap_is_folio_same_filled() takes an index in the folio. Date: Sun, 18 Aug 2024 19:16:18 -0700 Message-Id: <20240819021621.29125-2-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20240819021621.29125-1-kanchana.p.sridhar@intel.com> References: <20240819021621.29125-1-kanchana.p.sridhar@intel.com> 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" This change is being made so that zswap_store can process mTHP folios. Modified zswap_is_folio_same_filled() to work for any-order folios, by accepting an additional "index" parameter to arrive at the page within the folio to run the same-filled page check. Signed-off-by: Kanchana P Sridhar --- mm/zswap.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/zswap.c b/mm/zswap.c index df66ab102d27..6434e76a4ea3 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -1419,14 +1419,14 @@ static void shrink_worker(struct work_struct *w) /********************************* * same-filled functions **********************************/ -static bool zswap_is_folio_same_filled(struct folio *folio, unsigned long = *value) +static bool zswap_is_folio_same_filled(struct folio *folio, long index, un= signed long *value) { unsigned long *data; unsigned long val; unsigned int pos, last_pos =3D PAGE_SIZE / sizeof(*data) - 1; bool ret =3D false; =20 - data =3D kmap_local_folio(folio, 0); + data =3D kmap_local_folio(folio, index * PAGE_SIZE); val =3D data[0]; =20 if (val !=3D data[last_pos]) @@ -1496,7 +1496,7 @@ bool zswap_store(struct folio *folio) goto reject; } =20 - if (zswap_is_folio_same_filled(folio, &value)) { + if (zswap_is_folio_same_filled(folio, 0, &value)) { entry->length =3D 0; entry->value =3D value; atomic_inc(&zswap_same_filled_pages); --=20 2.27.0