From nobody Mon Feb 9 19:38:06 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 BB5DE6E619 for ; Sat, 17 Aug 2024 05:09:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723871371; cv=none; b=iyn5mr9wVc2zBMNiXyqT1q2g0aSkXZ0HJmhCRJj/4H/Gf0gv3AiwB5/blyVLUqZAeJK1eiWsUh3wjryk+Lyujt64Bo8VrYrs7aevtMa8OYaIL3Tc35P9yhOUGLu6UBMrNPMabg8nhgwE3W6kT6bXYeWZzUgniASreaXH04Uh3D8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723871371; c=relaxed/simple; bh=8aJTLnzMPmjHtUmt/CSvhY9AKnZREM8rFjycd3MYym0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aNtltd8FJ8L7qztKhzp7sCUm8mtDKW7sssrOnC2i+l2ds7kfYXVw4cvaRl3VPWxPjPyNnwbhEzpXmPlypLtwV8/Lr+c/t9ohZz8FJ4C5NAB4mftkJ7Kymon0mmRznxtU06I7SRP6ntgFOMkIP0YxD+/Bi9j4CV8veCReDe5YmVg= 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=kkWDkZXa; arc=none smtp.client-ip=198.175.65.15 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="kkWDkZXa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1723871369; x=1755407369; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8aJTLnzMPmjHtUmt/CSvhY9AKnZREM8rFjycd3MYym0=; b=kkWDkZXaJR9rEdru248RrG6sydONdnS8MDygDqzBDTIuy6Jr0BPTE0JD ZzIH2lricC4gSOKoynWnuqwkrOoSg0TgvEu/7xRO6pxgpPynSSzlx6bL4 ovPp/MGahq9ojszEpKvJ95H3wS3gwA6VHp1J5tPZHN5XjN1W2eR43+OvY eb3xVyrYSgCBD4ZJSkEqVzNaX81Pyajm2m6j6kl6ivtO2BXsfuQ7nrHrY SZMrw+yiSleTT/1fx3CXu+yLo3xMoDDb8yWIOZoPzdbrDjD9Mlai7Ga3T XHkVNmu7rQyb/SiPNZ/ooxRmeVobMXaiEKzjlwuAxOjnZSAC/Ve3j3QiL w==; X-CSE-ConnectionGUID: 0jKjyGBTQA2e/pVDLn8Q8w== X-CSE-MsgGUID: IFwNiohNRyeHsXL+IYGIrw== X-IronPort-AV: E=McAfee;i="6700,10204,11166"; a="25929463" X-IronPort-AV: E=Sophos;i="6.10,154,1719903600"; d="scan'208";a="25929463" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2024 22:09:21 -0700 X-CSE-ConnectionGUID: SVdXdoIIRwOh7Pc03Kd8zg== X-CSE-MsgGUID: Uu+OYl+RRTiJZwt1cW3OLg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,154,1719903600"; d="scan'208";a="60141492" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.6]) by orviesa006.jf.intel.com with ESMTP; 16 Aug 2024 22:09:21 -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 v3 1/4] mm: zswap: zswap_is_folio_same_filled() takes an index in the folio. Date: Fri, 16 Aug 2024 22:09:18 -0700 Message-Id: <20240817050921.18462-2-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20240817050921.18462-1-kanchana.p.sridhar@intel.com> References: <20240817050921.18462-1-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 adeaf9c97fde..6c5c656ec282 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -1358,14 +1358,14 @@ 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]) @@ -1435,7 +1435,7 @@ 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