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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5FC49C6FD19 for ; Thu, 16 Mar 2023 18:00:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CBEC3900004; Thu, 16 Mar 2023 14:00:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C47B5900002; Thu, 16 Mar 2023 14:00:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC0CB900004; Thu, 16 Mar 2023 14:00:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 94834900002 for ; Thu, 16 Mar 2023 14:00:56 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 6C8D5804CB for ; Thu, 16 Mar 2023 18:00:56 +0000 (UTC) X-FDA: 80575527312.25.14323B4 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf07.hostedemail.com (Postfix) with ESMTP id 11DF040024 for ; Thu, 16 Mar 2023 18:00:53 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="YDu/OlAZ"; spf=pass (imf07.hostedemail.com: domain of dhowells@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=dhowells@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1678989654; 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=qbEsnALNOSBxPiXGIwmunczWgV/dhcVYCQ7WT9nvyUY=; b=NbMuElI8dj92/yzLCVIoUjMv36pRIO7MmuhoBYYXCapFcjv2TTs5ggwKzO8iL6wpBRIhfw eJDZMLJEc1P89BsKALM0b4Ny75dRpxYb5NtKnSAPctqq7+FXqNym+WSVk3aOt+PEviB0b8 CFTC7LXshIbggcN1NL2qs3YhRPzRLLQ= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="YDu/OlAZ"; spf=pass (imf07.hostedemail.com: domain of dhowells@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=dhowells@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1678989654; a=rsa-sha256; cv=none; b=honCsKkSJjSCT8t5HNU3wTcFei7p9IZNguS+MvJQ3/4JSiCUu1qTywFFQWSzGlZlcf8IwQ 94cV7Qm1mjTUyXwTHt07C0qjRl6oYF5u3zcfaWfzmaWThfEOg8bOxJwdMl4H2bKKQCcBkZ XcC1Bcx9lx8ltWe0E3I7uiUipEfTXow= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678989653; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qbEsnALNOSBxPiXGIwmunczWgV/dhcVYCQ7WT9nvyUY=; b=YDu/OlAZpA1JmxyjW6uhZfJcVDKBjBmi7KGFAV+3Srwn39HFP/R2Jc4QYDiH0/++vfkH2v uS8k1rnQFBvSXdTndixKHvQ5FWnk/sZoYvMWMsYQM8BmPnmOVtkG+yzXONMFNYSpV1ppeD /hVcR+Rk2uhTLYIX27agwiWBTbFDgMw= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-450-kNgie8orP4CyP7VIozu2TQ-1; Thu, 16 Mar 2023 14:00:40 -0400 X-MC-Unique: kNgie8orP4CyP7VIozu2TQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 405F01C075B5; Thu, 16 Mar 2023 18:00:39 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1AE75492B00; Thu, 16 Mar 2023 18:00:37 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <20230316152618.711970-1-dhowells@redhat.com> <20230316152618.711970-3-dhowells@redhat.com> To: Matthew Wilcox Cc: dhowells@redhat.com, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Al Viro , Christoph Hellwig , Jens Axboe , Jeff Layton , Christian Brauner , Linus Torvalds , netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Bernard Metzler , Tom Talpey , linux-rdma@vger.kernel.org Subject: Re: [RFC PATCH 02/28] Add a special allocator for staging netfs protocol to MSG_SPLICE_PAGES MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <809771.1678989636.1@warthog.procyon.org.uk> Date: Thu, 16 Mar 2023 18:00:36 +0000 Message-ID: <809772.1678989636@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 X-Rspamd-Queue-Id: 11DF040024 X-Stat-Signature: fuh96i3ucqqzbz6hasjpujdc8qpt87yb X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1678989653-685140 X-HE-Meta: U2FsdGVkX18qyE6vmOqfeawcK6yYXm/tAdPx+23Ql8ZenYbDdiL7ROGSyjqtb4LiBgN3YMv+FPlb54um/y4tbhnmtCQCy8jjVA/YocXSGFl2pQHRgwq2PTfxudI78MoeelUW8XSQzKBQxJzsyHZIgKnIc93iqqo/vxmGfo7r7Jc2SfzMhZViZqvP5ymHaIdJakmrMAGkIKvq+yjanjrO67YrvVbVNYBTpl9IVMymThTNgVIEX1Xjw650AoVFbt+viOR0nvWATMsWLqiRblQoDhxaTnUGFDJ8X3me6wO578R1hn/rsIVdRdkdyIhOIErKBuz0m0UXY93EeJvpl4M+W5Y3kgp0Pk1LmjmdI7ccSjYOkpzNj4RgEDFrvMax0cN3omzY5BBn8NMnpVpHPcbaVcO3CTmKBBP1Zl+ZrZuWkgUWSazO9fQo+s0bLX94CLT2LVzm7uVM6sJ3p+Wq0VTFuTzGNqU1mmhAOgHSpeaIIOpkcSGqCr9S0/vlzOoS44ZQH9ra60xFQn85RcZlsGSW+vlcadEbIfsWRyNKMQMEZSEySKdbEo4UVxN0nk8lB4nmFyfXXcSF1AQ5VlaMixxFYLtccFZLj1pQ8U6afHQmf/JaIPhnTWWBbnq+G2XBGZkPGl2ekv/jXxHeZ8XHmmFYKol0mQs47ajAEXZTlevyEuxLY+08bNb6ABqSsgd7nZK/0QjwsQSUAEjZKGIC7schP4Y7kcsxgk0ZkVx7U0RO+9pduHO7xeGv6ewOrx972zsJ4Y0GEwNczmqTWbML2xaxouQ4cZ0z1/cm9+niIL8y0yEi6Vmp8bQNU/UQNtUWHbHsK3vOiTylSF+zn0gSMZz70ytkqOSlPdqdlVTrF9/aZ0NiFggUWkWbRpsx0A9GM3hPr28GNAgqvZMFhTfEOh7ZW6FLLG2r3EyWJl0FFZ5ChdjdtsqMCe2DsWkwwKiDWZdqouwDqe2XW46BXGlZIFn mOWQIoVj xPhj0rnyagIgVDC2NiqmyFwbgGg6cyOmP2e4N+mVuKHWpdeqEZ/7ASTZBJ32lBzPQPIdJPPKA2ZOoFqeG1uSFOjnwcc1fn730j0krVwWTOWpVBRsDKixpIbOMQ0LSR3+V5ZoRvOonTqG7Axslmj30f6am0A8r7AjiX3F/aOzG97OyEMZcpFM2qT6k8UnuGL9Z6x2ZB0eeBMllzdM4kPtisnehGxZGvgRU9b+xC6tSeGK+rpxUIrd+ao9s/gzyJ3nfuHBJNQJPz7hnHEg9XX2Jah06s3LcNm2mkew7y1AAyrYwQ09z0Z/Ho7k3lA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Matthew Wilcox wrote: > This feels a _lot_ like the page_frag allocator. Can the two be > unified? Looks kind of similar. I might well be able to use that instead. David