From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AC1C0C79F9F for ; Thu, 10 Sep 2026 19:32:58 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9EEF56B0093; Thu, 10 Sep 2026 15:32:57 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9C66C6B0095; Thu, 10 Sep 2026 15:32:57 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8DD4B6B0096; Thu, 10 Sep 2026 15:32:57 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 567686B0093 for ; Thu, 10 Sep 2026 15:32:57 -0400 (EDT) Received: from smtpin13.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 585A5A066A for ; Thu, 10 Sep 2026 19:32:56 +0000 (UTC) X-FDA: 85198850352.13.093AE94 Received: from mail-qk1-f176.google.com (mail-qk1-f176.google.com [209.85.222.176]) by imf03.hostedemail.com (Postfix) with ESMTP id 7469B2000E for ; Thu, 10 Sep 2026 19:32:54 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=cmpxchg.org header.s=google header.b=qhZKoLMe; dmarc=pass (policy=none) header.from=cmpxchg.org; spf=pass (imf03.hostedemail.com: domain of hannes@cmpxchg.org designates 209.85.222.176 as permitted sender) smtp.mailfrom=hannes@cmpxchg.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789068774; b=zV3GEi4Nwsx7JEQJwqm3GnVsDhnlpeq4A0t/S/Fw8CDn6zbNuVf84GHl4TLAQd5bi9HFhv RpKNJi4IYsCcGs4IEP2+b+qTblPnSO+glWn5TFs+PpPhiaMhEI4vUZhVDJMoNSl/Z246dc Xuwh4uFwzW6Q23qwRc42QOEwNhB/tds= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=cmpxchg.org header.s=google header.b=qhZKoLMe; dmarc=pass (policy=none) header.from=cmpxchg.org; spf=pass (imf03.hostedemail.com: domain of hannes@cmpxchg.org designates 209.85.222.176 as permitted sender) smtp.mailfrom=hannes@cmpxchg.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1789068774; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Wx9b/wJps4tZAupT/5Xjb4IrxZENQ2MyTShVT9MLYWc=; b=RVy5KF3hGWZ1nEqLVJoyG8jOUjj4TASpTs2Wb0ilPBgohkxfpMWSTcS+MpC8mhfU4uPdzk fc7uJkQoAYvwoazoIeTq+WNM4yKRrE9el7OIfg/Fh10Fxsnzv3sgSIcvx40sgRpzg7I3Ba jJXEFU0HSRF5YNakiWSKiRsu83Mtuog= Received: by mail-qk1-f176.google.com with SMTP id af79cd13be357-9399daa3d43so2091585a.2 for ; Thu, 10 Sep 2026 12:32:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg.org; s=google; t=1789068773; x=1789673573; darn=kvack.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=Wx9b/wJps4tZAupT/5Xjb4IrxZENQ2MyTShVT9MLYWc=; b=qhZKoLMelqp+FGt8ScMx5myOFyrH4okTxX7fBGjz54awSxNpfT6YLbFfoGZhG1DlqR IKoNI+NSk7esIOcRd3DN/Ku61/fU0ZlCS5uRJDRTf0Gx6PYZEia08CgY10Lgjc1Z6eFu i42t8gH4jbI+z3OI5uiQvhA4GaVU7C72rY380nougxgKSOGKYrEyZgwuhjQwe77EJv1a Ed6MkHs8pTM+x5ZITSjWiMCP8uq9aFVW/O9trne89iEqTYZpy1Dj+c53HTN+3qmpIZpo 58tfDD9TIYLXIJ+nPOPLDAoyRJbHWq6BuI7DWj6iKavK0TANeIp0wnOnaCOXZxehcm9v PZYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789068773; x=1789673573; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Wx9b/wJps4tZAupT/5Xjb4IrxZENQ2MyTShVT9MLYWc=; b=HeQKtZu8oAbHBjzPtjPJTfBHIS7wmtl+vcti5nDwcKnajc4uAKeCgN20tVBP98S255 wi2GRYxrQ/IP70SG+6852g8Bf/quv7nAdcNb7Jyq/S3783BEi5x69cwDvF5FiRdt8z4o h1DH6HBKGVi53MY+fTpk8FXzK9mjzgsUAp1yPYtlXB+pvafN477Wibb8wOsFOqcnlfOn tJh4kMDSQsBdVFcln89Fb5Afj+HztYPcoDuX9tUu5QjKz9MG/P47TI8Y7ZjXh5zNanh6 UvR9G430EOiwupsw5+dMUR+aXi4qzqTpRRMUTeTg7zPYXewBVxnC9aTbyvv/sDRws4Rw an/g== X-Forwarded-Encrypted: i=1; AKwUvByOAkmdRHOuHn05lTxkgBwONprkRersfD+1OWvNv5Nhirf3lYj3z2CCEb+GpfJd6I1Aj6fLJI9t5Q==@kvack.org X-Gm-Message-State: AFuF++miJEiNhL28MdTOe43hUDQpHDes6r3xsFIx3odcoSfZup6/Qufh iKlK0W5kBy4UgoIaPCvHi9RpdzkowZw6C/PMGkhKTE41I0BGdSnZr+xD39OuZzYraN4= X-Gm-Gg: AYBFou1X71xG67/OP86DdmBhwVEHPUh6wn8MNbG0xWkNXFDiZXZwLYasl7aTXo4OCVj girkys+S961VKGA+7pimNNjRzFGy+v6OD3WDNI1f8f+xx8356GvRjszdle21BzuHqPLK9lh9maf 05e1YVBlNRg6So6Ds6B627r9KTfNgLu56e9524gJSdaonBUiX7d/Qe5G8FKq3+qfagUWeiuqjqL oDbL15VSSiE8aVPsS8lo1Yq96o4fp5eJJLUYNjhKITuf8VF1J/HEaC5Q2VrJM56MTd15Yxs5DqO pzIjNUBPLft7hFoD7PvFspnfDm5k3s2qrLldgyf8pPHw7ADjgwpmHShwvr+51Me7SG4phYtwyhV aaHUuLnr3oCNn9Ey6MB/m8LU2FP1Fly6/50QOLtzPYCZ3OI91vdsB75KOwWhVCwRI6lF0NqeIkw waZKtbxYnI69Hl1NSs1Qihquj7uNlFk5JK0+lCu2JFgs0GsaVZYx2GEI8xeGjvNYELgUaYpUJUk DStyxLm X-Received: by 2002:a05:620a:27d4:b0:939:5ab4:e6ab with SMTP id af79cd13be357-939ea107106mr50396685a.5.1789068773404; Thu, 10 Sep 2026 12:32:53 -0700 (PDT) Received: from localhost ([2603:7001:f100:500:365a:60ff:fe62:ff29]) by smtp.gmail.com with ESMTPSA id af79cd13be357-939e80bfc90sm54889785a.37.2026.09.10.12.32.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2026 12:32:52 -0700 (PDT) Date: Thu, 10 Sep 2026 15:32:52 -0400 From: Johannes Weiner To: Kefeng Wang Cc: Andrew Morton , linux-mm@kvack.org, Chengming Zhou , Kairui Song , Nhat Pham , Yosry Ahmed Subject: Re: [PATCH v3 2/3] mm: zswap: skip xarray walk in zswap_invalidate() when zswap is unused Message-ID: References: <20260910123544.818146-1-wangkefeng.wang@huawei.com> <20260910123544.818146-3-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260910123544.818146-3-wangkefeng.wang@huawei.com> X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 7469B2000E X-Stat-Signature: mt7t5ck814yj5kk5sdwstsdne3cihyn6 X-HE-Tag: 1789068774-308641 X-HE-Meta: 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 gEZqaIw5 zyTwl5MZXcfgX65v+pbZzD0JBSIkLZq5JozeJkbNv5g/HhHB9Kg2LwT8kAaZ4DX7xfLD4NTGEyHtY8/zoLPsw1OLHeqwMyrhqbD80AHVL8c+A27J/t3qi+gxIfx6ZV6uuNVSsp75P+S+wtd1+pjPPaMT63gqr18ScPTadQoaXCpKkoZMVLmg+Hhg2ut+HlOxr7jn2I1+tLkZ3vG4/hOKVlGDcxP8BG983gTj/CpL6xz4X/oTCoOsUZ/APvh4WaSKsDkHe/x0QL+P8Ba0tJeUOs8JAvHf3YGCJDTTed8YknZNdTmgQ0PvdP6lwKTUGxmPgHT0SAqpSAxukGF11s8S4hlEGOVWvw0k24DD9Hfr2j+G9w+PXJcgYHJL8M0JzKsPEWvcvxeBY+rR+D4tCykxVEs0LHxrQH3TKIUxNVkfITev1iotv17g3JbnFamleH9vDQQGsV64ipL27nif57CknxOK/nLUQ2DCSg9ZkLH/Am+F4+6TZ5h626l2lEZxN5I3AuFKEkfx9Uk/wnDlWL1c/EEe0SA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Sep 10, 2026 at 08:35:43PM +0800, Kefeng Wang wrote: > zswap_invalidate() still walks the per-area xarray even when zswap has > never been enabled. Add a zswap_never_enabled() to skip it. > > Signed-off-by: Kefeng Wang Reviewed-by: Johannes Weiner