From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1CBE13C81B; Tue, 22 Jul 2025 00:35:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753144522; cv=none; b=EbVRQmJV+rAVogdhwi1uxbZ0EVcwrM5XOeob8p9P8kTGd9sni/zGP1Kr0RWAiwNJ1gZnf8lnuYQ4j/q8zyF/TAUQdc2+7hBF1lpwqwkv3Epl319ThUPzRdHo8xx6JpgiFBqF90KA9DOxaGW9wou8US0eSmg0+GJXH4oydGRCQUs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753144522; c=relaxed/simple; bh=AT7biWnsDCxaCvU7U+iSpw4vNS5TBQoe3SiDN0kL4kw=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=CZ0NtP0fSQmo9csBKyhdmwvd3sBLe+bA8M6EaCQXdJdxYWRsLxmzpB/OGTDxJwbIiYMHLaWtVfbflaGSGqwn6chNYqycH3tZITEzEMfEbZtngy1ZTCMk2J8xJyPTnulo3/tQVbYzoo1t18SPqKZ0wylpwOkLLvckGOC+PFxUNDc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=INuAml7a; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="INuAml7a" 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) Precedence: bulk X-Mailing-List: linux-kernel@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 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.