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 DEDF5E77180 for ; Mon, 16 Dec 2024 14:51:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6CB476B008A; Mon, 16 Dec 2024 09:51:06 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 654606B008C; Mon, 16 Dec 2024 09:51:06 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4CDB26B0093; Mon, 16 Dec 2024 09:51:06 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 2962E6B008A for ; Mon, 16 Dec 2024 09:51:06 -0500 (EST) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id D7E124531B for ; Mon, 16 Dec 2024 14:51:05 +0000 (UTC) X-FDA: 82901109354.28.F6BFFAE Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf05.hostedemail.com (Postfix) with ESMTP id 0728A10000C for ; Mon, 16 Dec 2024 14:50:07 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=RvnLNeYD; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf05.hostedemail.com: domain of a.hindborg@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=a.hindborg@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1734360636; a=rsa-sha256; cv=none; b=Zmq5g/w9T3w6shDdt6Tt6mCr53T+qwcRYzw5Xnrtk96kWBJoZmFzZW8ghuVyt3lFhjfy1+ aZKewkn+mE9L/FqsnYQnxXjc2tXYG/kgTHf/x+BQbFENb7xGctmgvKEpOI2c8VUzxzXtCJ ewYsbhwvtwqcPTBbfODbW6z0I4CwFIA= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=RvnLNeYD; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf05.hostedemail.com: domain of a.hindborg@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=a.hindborg@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1734360636; 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=XTXuUO4aBKnsu6RlrhoKNi7uAGfKpJaoy/LLiehShL4=; b=YaODIDull4AhTn7b5SfVTLIL7Em0ro/b5/635iledhh06RG+isTpq8rRecirDmOlGQTGgd IbKcZtj65H9VDU8VkK3lWaPIQOKrM7NpphOCNnBYGLnfpW4NPETA8Mzce+VIetF22aS8Vw a3GwQ2UrPkEeV4U7fvokYt2CyawhccY= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 464045C0685; Mon, 16 Dec 2024 14:50:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F105BC4CED0; Mon, 16 Dec 2024 14:50:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734360662; bh=XTXuUO4aBKnsu6RlrhoKNi7uAGfKpJaoy/LLiehShL4=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=RvnLNeYDgZc69r1Wb+U+sa1LklxVpJgX3RCE3Zq3sx3jMiesF49M82A0w46y05CH4 Bn93v93TrxhFbRxps5Fry23So0WIlaNH5Jqm8HKDdcKJHhUk7KRKqFjCHMnXFE0A3Z FHg3k7ypk4oQgxGNAcVsEyTGNXcGhYEG9tnE5kcezoRZ8ORELKe6TQ5CPJV9J81il1 QQsgEV5hWXuVfGQp4+zoDxIFUBWN50yHGcJrJfAB5b6fTNlfv++F/lLPXu1ElRxkBz 33Asya4gTt9/l6Eu2uiook4CPdj3WJShVtM5yQuS8kGoleAuwcUIb2KGkX+RjjqtjL DYvN7t+2ZLdxg== From: Andreas Hindborg To: "Alice Ryhl" Cc: "Miguel Ojeda" , "Matthew Wilcox" , "Lorenzo Stoakes" , "Vlastimil Babka" , "John Hubbard" , "Liam R. Howlett" , "Andrew Morton" , "Greg Kroah-Hartman" , "Arnd Bergmann" , "Christian Brauner" , "Jann Horn" , "Suren Baghdasaryan" , "Alex Gaynor" , "Boqun Feng" , "Gary Guo" , =?utf-8?Q?Bj=C3=B6rn?= Roy Baron , "Benno Lossin" , "Trevor Gross" , , , Subject: Re: [PATCH v11 5/8] mm: rust: add mmput_async support In-Reply-To: <20241211-vma-v11-5-466640428fc3@google.com> (Alice Ryhl's message of "Wed, 11 Dec 2024 10:37:09 +0000") References: <20241211-vma-v11-0-466640428fc3@google.com> <20241211-vma-v11-5-466640428fc3@google.com> Date: Mon, 16 Dec 2024 14:10:47 +0100 Message-ID: <87seqnai3s.fsf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 0728A10000C X-Stat-Signature: f3wsz8uf8fstdjtgws38ppwnwuy6i5r7 X-Rspam-User: X-HE-Tag: 1734360607-449531 X-HE-Meta: U2FsdGVkX19M9xnmTCdtiVeDHPIWDzQVQXgEO0pZv05L0HaLxXd5NJ8TSGTnFuEZvf+3btQtawAcFupXzLfAo3FLMpPmTn1n1tkIWmDKAe4O2rHa3rif9nhEz8d1202K7R93lHbj5+unEQ5KoSu+gcpHHZzgyA3owHq80LIQhzmUm11uHch3k6J9bo9rpjuDH9N9Bc0H675e/K92gxCpDOXWl7yaaRXo1KMufLGvntOJTpSe74BHeisn1cON/ZFv7Gz0mbx+pqQ4vUSXdiModjh7tmHy2mzqP4jTRw8lXgjL81ed+tcieseBIqO5F+wHWt19HgDFvL5FqP+S0noo0JWy1OK1fSrIAnhdS9qB9UVxkPv5K0BUXP7o9dbMBSkg/u8d6UJ+b2ow3LKVeDBliR7Y83aGNV2v9Pr6bczONdsgj9qDsmW5hBkmbG5/HeYARX7NrxOWEsU/0S3VHND8IVhn0qD0mZxTvGaJxdeygz45WgE4amCgFHUqtZQofh5Nad1N2kP9D+6pVV8H8fp9+fzIJxhaTADnrKvSIfGL9H3ynabDwrKcCc8sclPv5hWxovMNF5tH2UG6u0xo0ab0WqfSsnq4Ein0aTX3cI3S5jiIgPUe8E1QeLxu1BD0dDjuga1Eveb3KOg3tlJ7/KU2c5tdy17JtramU6yE08XKkIBqHVHDVA78OPcpx9VEHHD7+FjpkDXS1OH310ddtA/MZ58946DcpYkikTA3pcaqsiB6WjT/FsjbyAsvlXKb6dFbKvVBuuULHSMvd+YU14cougDChaQtJZcyvnt72rVF8SkX55O8+OuOGNirUhAu3rUzFBfLkIXbcYQIjIGrVxmDWbNahjl02o8PCd+vGrjsHtD5/YZvLGB0cQ4aA6YSRtYPNgKXOA+jEo+/1g5l2WmNfgJ57YZrUaAgbZwWTmKJ3bOZzt1zhHO22XPIgtNEjZJiRma+UpMPNQYI9q3L8HA nPecvyg/ IIcaF78R9btq0hVh3ka6iHbpihjdBvcZCt2cQeCBlHH+hkB73BiRQjXWFf9JZ/ShLrrH+fT0XLsQwsWK1kuD2dAdVXhcNYV+xkCu4RVPQjGY5P7AK8gY/NP4auLOmeTMrC+PfD00qhuWjtWke/lLivgVJhMfbOxcEkBNrsxvgtbP5ab+SSRaQG/NDgJ2GEeMeTju2YAY4PlPg3N9HDOUVxu9bmQ67AA7cBxnIhJ0BtKFCuLZP+DOlQ4HAcmtp62LWEXOc2H19nchhfSg+3H7CyE3bOASfXlgdyDtmhqh5mcnwq3chn9QbREdV6D+nWsypAZifQZMuA8zKQQk787sLpc789imJDdnFR3KZR1NTDRFd+q4e0uEv//5kOTR39kGcnPJ7LakVdj+XTjmYPwEXe35IY7azUfuLnwv/ X-Bogosity: Ham, tests=bogofilter, spamicity=0.438605, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: "Alice Ryhl" writes: > Adds an MmWithUserAsync type that uses mmput_async when dropped but is > otherwise identical to MmWithUser. This has to be done using a separate > type because the thing we are changing is the destructor. > > Rust Binder needs this to avoid a certain deadlock. See commit > 9a9ab0d96362 ("binder: fix race between mmput() and do_exit()") for > details. It's also needed in the shrinker to avoid cleaning up the mm in > the shrinker's context. > > Acked-by: Lorenzo Stoakes (for mm bits) > Signed-off-by: Alice Ryhl Reviewed-by: Andreas Hindborg Best regards, Andreas Hindborg