From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f48.google.com (mail-qv1-f48.google.com [209.85.219.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 199A5230BDB for ; Thu, 23 Apr 2026 17:42:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776966131; cv=none; b=X//nNSvBmHNH5i4nCx77QsuWfRKymVUlHxo67+oygBNbgYxPsz4GDLP5c3yMUxfywXGj2cuTaYgOAz9INlc3gzLIWmZlLo2xRgkac+mzGWaLz1tp4WcNVPDMghAGbIm59dR/sRexQhdFbLpMlv1FM6G7ihXg5fSVWgbPRq/MYyA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776966131; c=relaxed/simple; bh=+h1upxh8wAP9KhfzOGlvmcL5ix9gyVDXYQlyfiAh+RU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=W7aT1lBSIFDnp4r6WUAkhqBAnUaWNHTedrf7QQAjM7YbN4722DXaNvWdUguSRhxjENu36fnh8LbmI9TNUNLo0Ud+dwDXz/p7yYqsM9mMy/eYbi0aBhqj7RoDzZ9I/eSsRLmCHbY1SuaYAB74AEnptRAD5NTI8Hlo+wS/aOuOkrs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=soleen.com; spf=pass smtp.mailfrom=soleen.com; dkim=pass (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b=RxbmmhGV; arc=none smtp.client-ip=209.85.219.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=soleen.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=soleen.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b="RxbmmhGV" Received: by mail-qv1-f48.google.com with SMTP id 6a1803df08f44-899a5db525cso55576166d6.3 for ; Thu, 23 Apr 2026 10:42:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; t=1776966129; x=1777570929; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=q8pH7aIhkAAd4FmOdPYp3EielDOR+Hmc79iCFACzh0o=; b=RxbmmhGV8VZs+I+xhj7zu1q0Y4gcqgprB27Mg8mEXS8o0k0V8cXcozpjQ5mCGeO+Ao wChkh+rs6bBd4CEowF6dZ6X4hjdstdkr4214w07+Oc7oOYFdUStGi1yiZWCK64Elv0N3 vexkTBp7OEuInJ7diHNbbNTp78yQuaFRm7oRUKmcNcWnOfIGJICa9CGx+pq+Yq/5NFZQ TvSgkpPygmyNQLasSejB9hUO7hYWMlbW7PxOm0t+uB76w43ziuMRw2JHIKyKl7MHc7DA LCXOTPx5CVzeG81lUf+jvjBUR4bUL3oZ13bGfgtAU4MPyfjhUTNe6iLUyIWZHXh4ZiWv m1SA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776966129; x=1777570929; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=q8pH7aIhkAAd4FmOdPYp3EielDOR+Hmc79iCFACzh0o=; b=RKhLbTVit3SyHCDIw+U2sU+3BfA5C0nG2fZVZb5TKb+s+naMcwyQat5djPLvkmVw0y 4EbgGkmd9F6/+dD+TfTph2Rc6WWvzbwxFVyQbsmKZbV8kSchI/qnIILtyOFJRjhoxKDg 8qop7jrMGDqSLpvB0qVOKvYqUcEJQIkLnfHO1Y41cBqznk9lKMhPZ3znfXElbptFfLwG uJhhXJyOhPCqi9tV+vBqGSZTJNuaoFonAdLcB+HtCaQDgMtM2gcnE1UhNycUMI7VCXD1 OvdZLFteRj9lBLZJl6CypZ+Gr/CXlUdowbvi1MC3e+nbi/Vf/OEKvVbVxnusCQ1wqfnQ rORg== X-Forwarded-Encrypted: i=1; AFNElJ/8jrAknylO2R8bGE6PHfv1oMMiUVJZHtmQzpWdtC1GrJ1z5XjM5fguUO+ACQb4RUygTumT3C8fxPFmy9I=@vger.kernel.org X-Gm-Message-State: AOJu0Yy40A6iCcvXpwjxBFpeR1In2+gcn2EtN30WFoMSf6XlQgSG8x6U TcNIDXc+7GcJkMSNCwDTTOg77pIiik8a2DUIp8H5vhxATkqgzyMkAFFNg92AIH7GUFI= X-Gm-Gg: AeBDiev+JnM+duWbN3BUoSyb83SPxwA/zo3Xv7JileYpBcQlTNEiCj+pzm2mizwIFvH 0KsMSiG5OoATaK6i7fo2lf13Jkz0B+Y/+S0o8oM96b+RQhYHSTB7X8E/dHwt+4EqC0dasyQTZ+Z giQSCVKwgSnT9ndcY79QOf+UcRQb3Cu4Cvtwoxm/hA8WPhsYSm7EAcRCIVqXmUWrg+v4Jsa5RhZ sHI/esbP/veXoZV23LNByuPCdFgwDZBxPk9JcGV5DRVcQtNXnR7xyFJyMmKEAir8DAnMoYbYHIu duYDsI8XEOajGWQmRxm8Q7690RoSqN3FpE3qFh8lw9vH7LCYjL/2jT2KLNhfh8nBWNB4CHsJxzL XotuygPfEpO3RNn2EKv8W2j1dGjT2vBFABPja4bsxOKYYjy/Ww3xWl+N/b53ewrIpR79kSiCNiN wHMa4TGpgjJQQi4oiqLiry2H4SApo0PFIUnK/E1bYBGJRwNS7q9T1Id6PPZPaAuw== X-Received: by 2002:a05:6214:8016:b0:8ac:b328:1314 with SMTP id 6a1803df08f44-8b028012885mr364606876d6.10.1776966128995; Thu, 23 Apr 2026 10:42:08 -0700 (PDT) Received: from plex ([71.181.43.54]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b02ac78513sm164398756d6.19.2026.04.23.10.42.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Apr 2026 10:42:08 -0700 (PDT) Date: Thu, 23 Apr 2026 17:42:07 +0000 From: Pasha Tatashin To: Michal Clapinski Cc: Evangelos Petrongonas , Pasha Tatashin , Mike Rapoport , Pratyush Yadav , Alexander Graf , Samiullah Khawaja , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan Subject: Re: [PATCH v9 1/3] kho: fix deferred initialization of scratch areas Message-ID: References: <20260423122538.140993-1-mclapinski@google.com> <20260423122538.140993-2-mclapinski@google.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: <20260423122538.140993-2-mclapinski@google.com> On 04-23 14:25, Michal Clapinski wrote: > Currently, if CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, > kho_release_scratch() will initialize the struct pages and set migratetype > of KHO scratch. Unless the whole scratch fits below first_deferred_pfn, > some of that will be overwritten either by deferred_init_pages() or > memmap_init_reserved_range(). > > To fix it, make memmap_init_range(), deferred_init_memmap_chunk() and > __init_page_from_nid() recognize KHO scratch regions and set > migratetype of pageblocks in those regions to MIGRATE_CMA. > > Co-developed-by: Mike Rapoport (Microsoft) > Signed-off-by: Mike Rapoport (Microsoft) > Signed-off-by: Michal Clapinski Reviewed-by: Pasha Tatashin