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 3127BC83F1A for ; Tue, 22 Jul 2025 00:35:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5D8BE8E0002; Mon, 21 Jul 2025 20:35:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 589B38E0001; Mon, 21 Jul 2025 20:35:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 49F8A8E0002; Mon, 21 Jul 2025 20:35:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 37ACA8E0001 for ; Mon, 21 Jul 2025 20:35:25 -0400 (EDT) Received: from smtpin23.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id A06B31401F5 for ; Tue, 22 Jul 2025 00:35:24 +0000 (UTC) X-FDA: 83690031768.23.E88985D Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf02.hostedemail.com (Postfix) with ESMTP id E459880004 for ; Tue, 22 Jul 2025 00:35:22 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=INuAml7a; spf=pass (imf02.hostedemail.com: domain of akpm@linux-foundation.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1753144523; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=EsXWWPwR7DnfbUiy0T1Ep+dd0MnCyz+JTCzy2sAeeEk=; b=1FqIIiCh+F/tiL4Jr7YPhcX6Sbl0KV9bFtbA/RHIEPVf0O+LnlnCNisKnj0/bFJ7z4WYj7 HsqR57Uo77QL4Kz3SMqwXzou4NYP4jBYa4vtsmRcG79n6egtkTO2Sz57RSyw3jvB9tOqUO Kf/C3qR2R+vH2xR8rVJ7vrR1+xI4hYU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1753144523; a=rsa-sha256; cv=none; b=rmyvvQXy+8k7DMiM+R/inS6ZLEcxrczMvOsyv76ocDipKo0QQ/y8DA/aGfurFSGEuCO4De 5pB3Bu5HcDnuE46cHhTccDDK+64pZrcL+vd6DVIiD8wdBTm9fZOB5SNMbqQmBIFnOvxcO8 hdpLOr4F/wH6iw89z9Sy/5yYun+foFk= ARC-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=INuAml7a; spf=pass (imf02.hostedemail.com: domain of akpm@linux-foundation.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 8B10445E94; Tue, 22 Jul 2025 00:35:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7F17C4CEF6; Tue, 22 Jul 2025 00:35:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1753144521; bh=AT7biWnsDCxaCvU7U+iSpw4vNS5TBQoe3SiDN0kL4kw=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=INuAml7aaOfZKzIUxI4Jtp5dIRPXceDiGCMSn/BcpBEsTc1817QQF/mLnLo7zVGvC tbq9rI4BZrhjCeeHWJKHB4TAfP28laWLUpmcWr4W9hiZ6ObpNJJQoYLudeaLJcdFFn UTOfW5v0jeh5cKAcLjqgeLQM4saR33e63KErjkHU= Date: Mon, 21 Jul 2025 17:35:20 -0700 From: Andrew Morton To: Andrey Ryabinin Cc: Sabyrzhan Tasbolatov , hca@linux.ibm.com, christophe.leroy@csgroup.eu, andreyknvl@gmail.com, agordeev@linux.ibm.com, glider@google.com, dvyukov@google.com, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH v3 01/12] lib/kasan: introduce CONFIG_ARCH_DEFER_KASAN option Message-Id: <20250721173520.a24c29782de519dab1c59fec@linux-foundation.org> In-Reply-To: References: <20250717142732.292822-1-snovitoll@gmail.com> <20250717142732.292822-2-snovitoll@gmail.com> <20250717151048.bb6124bea54a31cd2b41faaf@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E459880004 X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: nccx9zexac79tucdshhyrwe7xat3xnkw X-HE-Tag: 1753144522-212722 X-HE-Meta: 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 zbNBS9nU nVKGAnTQNImSoXrjlZ5xAbiGAa9+WZq9xth7SDA16bXrUUnjtwDn5CussXxC4I8r0EIclt0bDXV3AazLRB8yb/MbsWFj8dXnuJRj+HVQd6wiqUO7zZjiw+I51mg8GuPkKEI3g+/1udwHq1S5E5KQxMWpDNGzQEAGWvvIfwZI9MMcP8w2fKtWY4f9ttlZ4c8ETwmpVcjh/ANsROnf/mSDfzjpAkvXVre6CpC4v5HU4PPg9n+EcV+u5qbYUulmkFEziyVCQT6aVKsaWBRRgrjuU6JrZYCNb9D68Uhv1R+vMVYy1E3YmZA9KnP7B1oCaIOV4K46pQvxIrmmjXmQrbYYyE7RQH2lcy1HzORLBaHvrRC9dI38zWln6nIUusTte3+Axl0YECkA088LoqmY= 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: List-Subscribe: List-Unsubscribe: On Tue, 22 Jul 2025 01:18:52 +0200 Andrey Ryabinin wrote: > >> Architectures that need deferred KASAN should select this option. > >> Architectures that can enable KASAN early will get compile-time > >> optimizations instead of runtime checks. > > > > Looks nice and appears quite mature. I'm reluctant to add it to mm.git > > during -rc6, especially given the lack of formal review and ack tags. > > > > But but but, that's what the mm-new branch is for. I guess I'll add it > > to get some additional exposure, but whether I'll advance it into > > mm-unstable/linux-next for this cycle is unclear. > > > > What do you (and others) think? > > After looking a bit, it breaks UM and probably LoongArch too. > I'd say it needs more work and not ready even for mm-new. OK, thanks. I'll drop the v3 series.