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 CF45B4570EE for ; Wed, 29 Jul 2026 11:11:55 +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=1785323518; cv=none; b=ffb8KQLY+NrDVUzhH6ZwGg83EzcsQ9b5Zh8y5O0u++Xh11/BIIBeQn2L4WXZdCPkVCZZhs0HN65M0VZesHykNO2q8KTof+HFEMlACHhZ/GCbyzHIowJIxRFDGB+CepK3eqNnDra5qC8hLE32nNp/DD14P4V2psezRXPzumWt74o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785323518; c=relaxed/simple; bh=4SMrxZFu5PL7ZJ0IMWWAVx458jkDG5Hh2cXO23LVhnQ=; h=Message-ID:Date:From:To:Cc:Subject; b=Xj0j2uSwtwsJmF0tOfCv7VH0Nib1S/nKcMkklmkLLnbuMpaLBEa94EQeTthoC0GrhK4nVBVh/jynJIJsBYxwKVEn6Ffbfs/8hmxqLNRi0hU7U42ZbwSRkYsFFicKSvdO0t3Vs2kfYoXYvb9L6VH2rkb6IVPZ0qx+1rKVTSMiefc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=cbMo6xHQ; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass 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="cbMo6xHQ" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=4SMrxZFu5PL7ZJ0IMWWAVx458jkDG5Hh2cXO23LVhnQ=; b=cbMo6xHQxDTYeWOvZyxEE9tkru 57QStZ22zD/EOjiUwUwb4L9di/SEhfQsEwTFX3IjUwYRdxffKjteC8X1j7cuTM0Hq6GwNxMg6pE+7 IzEirJ42pc5c2qJgY5tn1ChTX1U9dP8OaVqdPf/4JHgDllYwIOvF2cd/lJnE+ezuX0qHi+EAUYEOW obUyBy+DEvmzwpMTBQ2OguorvZ9pfsSv+LRmAvGd1KchcQsMbxzMJHgnVAO+l+Vzw4ru0262mB4h6 oOdDKdBh4cWLD98pMiWjo/HXXigDesnjTQJ4jVYW6VdHP+lHumwL7vaed4v5ciKacsLADZz43K2vG e2tZBOvQ==; 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 4.99.2 #2 (Red Hat Linux)) id 1wp2CM-00000005hpy-1oc8; Wed, 29 Jul 2026 11:11:42 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 0) id ACF023004C9; Wed, 29 Jul 2026 13:11:40 +0200 (CEST) Message-ID: <20260729110807.797920433@infradead.org> User-Agent: quilt/0.68 Date: Wed, 29 Jul 2026 13:08:07 +0200 From: Peter Zijlstra To: Dave Hansen Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, Andy Lutomirski , Borislav Petkov , David Hildenbrand , Ingo Molnar , Jason Gunthorpe , Juergen Gross , Kevin Tian , Kiryl Shutsemau , "Liam R. Howlett" , Lorenzo Stoakes , Lu Baolu , Mike Rapoport , "H. Peter Anvin" , Shakeel Butt , Suren Baghdasaryan , Thomas Gleixner , Toshi Kani , Vlastimil Babka , Will Deacon , linux-mm@kvack.org, x86@kernel.org Subject: [PATCH 0/3] x86/mm: DEBUG_PAGEALLOC musings Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Hai, my take on how we should be 'fixing' this DEBUG_PAGEALLOC thing. It appears to boot in qemu with debug_pagealloc=on and such things.