From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 08B1327E04D for ; Fri, 20 Jun 2025 09:01:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750410111; cv=none; b=FjCFLcXzRpA1WLt92JQtwkaR+fefBU/LrW0Z2BSRnn0VmXGcX+pPJ8gDNcPiwDYcKoGLMYK81skMFB2Qf1PIfIUms0jsXon9gQqayCeAi/iTPzpC69GX6Z5cPn8WNPkpvM2L/hDTWXLGultBkd9eDJ2oy2GvQA8rk2MQIkcJEvc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750410111; c=relaxed/simple; bh=u20LsYVv2bBVewclmCl8t7SLbB0OfMCAGOvLPeYZR3U=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=n00WbHWTSG2WRDxlXCPGwDdspGd5lLIYa8Z5fA9gyfpQVBC9QfXHRkJsY27VJdmVh2mGsxpsKEZA5Ns4BcprShw3kHRVIzJMiKkpqa++J7XTVsemMT9oKUi+0fa/Zwt+JXqO05qfbDpZvxVsIQtPeoMZWu+i3iSWgphkIkjVR2s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=b5+IYxp2; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="b5+IYxp2" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=uc0t/KwBwBUp7lsgLA5du3AoKFB1dg6IBCy1aVt3dzM=; b=b5+IYxp2455cgv8be4OjVh7SlN ya8O/sBc8w00lHFoQNCMm57gzJKffIQcjVyWBMFz9KWwvWjZYMeF6073W2g2SQhJUYrkKcwTHlcN0 JVAhLQ224MIla7i2hKRycdxJghEZ3+ezbIRnM/qTH4d4B6vjO7utnKHa06wXuL3xhZcRc6rgRzSqZ UtDwdYzGp4QW2Mwqd35AdkQFpcu6V2ZOUb/pmUotxwi7m6ePzQ9NAJLyYsmwfwTRHQCNYg+0hAxXH /I07MfAjWwc/fWyaWad/wa6/9BYr0/QynToY2YsLp6hVgc2QQ244SKPuVxYE2/kz192UJLh/aZsZH mrxDkgSQ==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1uSXcz-00000004gAz-283L; Fri, 20 Jun 2025 09:01:41 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 91CDD308989; Fri, 20 Jun 2025 11:01:40 +0200 (CEST) Date: Fri, 20 Jun 2025 11:01:40 +0200 From: Peter Zijlstra To: Khalid Ali Cc: dave.hansen@linux.intel.com, luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/mm: Fix log overwrite in CPA check_conflict() Message-ID: <20250620090140.GR1613376@noisy.programming.kicks-ass.net> References: <20250619174305.897-1-khaliidcaliy@gmail.com> 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-Disposition: inline In-Reply-To: <20250619174305.897-1-khaliidcaliy@gmail.com> On Thu, Jun 19, 2025 at 05:42:41PM +0000, Khalid Ali wrote: > From: Khalid Ali > > On certain configurations (e.g. custom builds), check_conflict() > may produce a large number of warnings, flooding the kernel log > and overwriting earlier messages. > > Observed warning: > > CPA protect Rodata RO: 0xffff888022a75000 - 0xffff888022a75fff > PFN 22a75 req 8000000000000023 prevent 0000000000000002 That's not good. Your system is sick, limiting the warns isn't making that better.