From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 412BA3CE4BA for ; Fri, 5 Jun 2026 08:33:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780648417; cv=none; b=m9x3kvUhgMMLPd7hrD8MFdivcY78MCW3iFpYTTBw+x3nCBcmskVHmcet6MOUQ7hiw52D7zcAM9toRlQHC/N2vHvVSpNtHoJbtrvSKydHJP3dabVCtAnFytzu2347tI3+hrPvUkod/6X+NM+9eypGXGOH7zOUyPNpxFUO+cIBRoc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780648417; c=relaxed/simple; bh=dw5ZX2TWY6dZxDUNc60ak9mge7y/ImiGMvgzZEHUi2g=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=utsahC5U0hmV5Zl7UsE0RljSA9eBEtx0wU8DqSn3rLwzLz53m8VEdhkf8uvS9P+qJLVtKYQylxZRLheABQpEEB8tYjhhjTx+v3SZA5bIVrLHw/5LIsfCj+UN7fIxq00DYLllkyHnjjEdABoRA/0Bhag+E8vg5oND8FGEaxtt6ig= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=nJz4tggM; arc=none smtp.client-ip=209.85.221.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nJz4tggM" Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-45ee6d32402so884453f8f.1 for ; Fri, 05 Jun 2026 01:33:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1780648415; x=1781253215; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=h7EXbRC8R67rHvzXFjU33E64Dl9gsGtZbMHZP+ijZ/c=; b=nJz4tggMJJD7crGEEgG150BuCI8vKJ39zcU6sPIXnQqpOh7nrSB5H0g8Uk6bs7bU5e irOPuMEs+7bFgcZ1MKCW9XicfTmJn7qi30DdQswOHtDQY9Pnpmi8ccgZUCQhX+epmpR9 +zKonV1LwtyIGTavv/CNMmYONEUKzAgFZd6xTR6k9OJ+Z3+BZ3byc3lbePTS3O8R+BSi +94kTl+PiY1gxjGIwvqH+uotLZuLb8/FDRtxg8KUwfgn1zT0X4AvJcmGdJtjk5JUt0fG L+5Xul89jRKKwtZJwBAIvpVC5zOqrMhNs4ueqEMxS2KyOoKOLWI2lcDD6F3eruBZ8tPG X0QA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780648415; x=1781253215; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=h7EXbRC8R67rHvzXFjU33E64Dl9gsGtZbMHZP+ijZ/c=; b=PTwlxpfsL1ZcfdoB4gvw6PdDl1cBQczPIjOdcvx4nYHwGbhf19xQpjnzhqtfmDj7RP KczUmmOHCw/woTy8PhNv3wtUjUbE4A4EMSKoRTCVlOU04Ni255hzLfMuGdUdhdSpLiJy 1i6NlNZ7M+QZOKJiVpAPgVYWQQuQImoRPAZ3ACq4mrD51gMGmEEmpC6uWSj3uDTbnSGO cvOs2EHytEv0G0ccovaPXthS/imG6hPuX1ELlwnyVsWkqYS8MjRO3usQ2dl9b415bDTx XHSQP87PLqTVnpFr7UAlYVtsrCUoj3hdKYxZ2l8qmflNKmjhg9PEddx1KjZL2sJLX79X O1bg== X-Forwarded-Encrypted: i=1; AFNElJ8ub5Dd7qzlHTLSHR2EZ3AnToumVYSP3JlJaCuoqUnrJNfi9ifdLcBBAW07uYX2g/1uxcr8owoj2NivTPII@vger.kernel.org X-Gm-Message-State: AOJu0YykYoM5XUwcfq5UTa6I4h/U1qL7uQxsTpFkpdFcGfx0sYs4BYX/ 6/B75LGns6hUmAEdGaPbc+53scMnta2gHXVazhBspWYA9FreNG2JpGPQ X-Gm-Gg: Acq92OHP6JlYEl0eeEkB4qxvTJaapxcFX+QEdIjeSzxFS7QGONpSacDq1gIfgx/G2Kh BMbX2EaSkYixLW/FAub5VJyP6Wlwz04tk+IOP8EPSYN/P4J+gZ4sCATkCI48+dId1ZpwNM6nB8Z Xuje6ycRNTc5u4uMuCs9JYiTmUqMB3ejhTMSbeusvXR8koqmkaI6htXpvkqh0qNisbx+WfplIJk VuyReWcg4PJHX6Cl6F1pBkxh6vBfHUTCob2evkf9FoyWg7M5jjH5wUXbz2j0QjnRtAcVklxEjrj FQHzjRhLtjFMP7+lZsJwVfZrYrFCr6+HMnKKd0EBetPKIxMi1UQfb8gS1Co8+gFQE98gbv5Px+8 zx9ETlZ4XD52RbFs9t5XWGqAvqp3TxiGaOzyvt3q4b+MuvF/THRvyEV3uSiYvJko9YtsyiTgO7L q89NuWlI21lc9kP6yEWQzTQeez6+Q1IhV6hwmlhpTR6j9NHGCtRqL8trhv5R+dyfEMGiFd3Mw= X-Received: by 2002:a05:6000:1288:b0:45e:ed7e:f8f8 with SMTP id ffacd0b85a97d-460304f07b8mr2783510f8f.8.1780648414528; Fri, 05 Jun 2026 01:33:34 -0700 (PDT) Received: from pumpkin (82-69-66-36.dsl.in-addr.zen.co.uk. [82.69.66.36]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4601f2e4004sm24140153f8f.9.2026.06.05.01.33.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 01:33:34 -0700 (PDT) Date: Fri, 5 Jun 2026 09:33:32 +0100 From: David Laight To: "Theodore Tso" Cc: Mike Rapoport , Jan Kara , Mark Fasheh , Joel Becker , Joseph Qi , Ryusuke Konishi , Viacheslav Dubeyko , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Alexander Viro , Christian Brauner , Jan Kara , Dave Kleikamp , Miklos Szeredi , Andreas Hindborg , Breno Leitao , Kees Cook , "Tigran A. Aivazian" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@lists.linux.dev, linux-nilfs@vger.kernel.org, linux-nfs@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-ext4@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 10/17] jbd2: replace __get_free_pages() with kmalloc() Message-ID: <20260605093332.7b067876@pumpkin> In-Reply-To: References: <20260523-b4-fs-v1-0-275e36a83f0e@kernel.org> <20260523-b4-fs-v1-10-275e36a83f0e@kernel.org> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 4 Jun 2026 10:05:52 -0400 "Theodore Tso" wrote: ... > I suppose we could do it with kmalloc() with some flags which to > prevent forced reclaim / compaction, and if that fails, then fall back > to vmalloc(). Is there a better way? There is already kvalloc(). I'm not sure how hard that tries to get kmalloc() to succeed. -- David > > Thanks, > > - Ted >