From nobody Mon Feb 9 16:01:28 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 F0C6E81749 for ; Fri, 16 Aug 2024 05:48:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723787293; cv=none; b=jFFdCHHwDqf9rG3kpdrw/JYyqOEulUdH3FjTUGOrGH5KRTwLRANR84i3G3KC+pMH30Z/AReIvHh74F2Zqj9q/KNnwMaHeshqMzUXmJmqXFjmDZVgM76JtSOzUAHybsRedZXY/3ytFYiibkJ5+VbTObWTRKnbEiidMsrKdZ6KNa4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723787293; c=relaxed/simple; bh=8aJTLnzMPmjHtUmt/CSvhY9AKnZREM8rFjycd3MYym0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nRI9MnuniXTpWdZKrjZUs9DVy/0blxgQ8tiDoHLwL7spH+K5kV07k21gMnq1L2ooHt9rDon4gvwre7TmiG6Jzb5WioNTo7opIc3nUAwYhk5G1+gvAgvoamjEP4q54BA/HDcTdLi6UlZ3wri1QvqgQ3Gg3O7RIxQL6ohddBoP9Q8= 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=jpVcvlYQ; arc=none smtp.client-ip=198.175.65.11 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="jpVcvlYQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1723787292; x=1755323292; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8aJTLnzMPmjHtUmt/CSvhY9AKnZREM8rFjycd3MYym0=; b=jpVcvlYQdrxl1jKadDtIuLEqhfTt2xUs8vrtFp18UIb/tk+dr/Te9UbM Dkph/Ys2IeuTuLC5jMy1Mx0Ip3pC1M9mopcOrmmtLOA22+VaU4/4TrD/m 5uHRQKXjf7zbYYXtC0NTFD9KYtp25dyplLvPONJhYtRYlnkE/BnIPFtx3 clqgEa2xNjnhHPgpqD//vUL9eacvKNVhzW7Hmq52pStgC4cjj1Z4S/HLv kP0Ij5Y4mVhLU0XnzCQzUsOOAGMYKWlMPm2XQSXT6pGpEiOTk5tzVDmm7 PgD1msPxEitAVDesmZzakqZR0fq9DRZyvxXAit591RnZ9J9qDVU42UvO/ w==; X-CSE-ConnectionGUID: bKc3z4fjR6aG5odObSrzYg== X-CSE-MsgGUID: qMK7W7bMRf2UwNLGMeuAyg== X-IronPort-AV: E=McAfee;i="6700,10204,11165"; a="32648114" X-IronPort-AV: E=Sophos;i="6.10,150,1719903600"; d="scan'208";a="32648114" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Aug 2024 22:48:07 -0700 X-CSE-ConnectionGUID: CmHiJCcuQdavnb7D8MPHOQ== X-CSE-MsgGUID: 39CNgtIxREOwdGxpX5wumw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,150,1719903600"; d="scan'208";a="59415332" Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.6]) by orviesa010.jf.intel.com with ESMTP; 15 Aug 2024 22:48:06 -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 v2 1/4] mm: zswap: zswap_is_folio_same_filled() takes an index in the folio. Date: Thu, 15 Aug 2024 22:48:02 -0700 Message-Id: <20240816054805.5201-2-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20240816054805.5201-1-kanchana.p.sridhar@intel.com> References: <20240816054805.5201-1-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