From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 196D922B8AB for ; Mon, 22 Dec 2025 22:12:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766441574; cv=none; b=lD+1U5nBP33N6N2E+Tm1CC89dL+ZVq19+nE010owMsPlFmGTU7KzlwC5jXk2FNN40lqk+q5pA8eyjuh+TmruFVAko3MpaVDnbrOfiWX4SlTcic1LDK2ZGNlE0MZxrDjYZWxqWH3fccFTXVCBdcvCk9Z7+VbWjOn5RdnowWXfQMo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766441574; c=relaxed/simple; bh=dbulMu/sWboXqvHQUO4pB23e78RbvcX80pdm6qOA5lM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DnQqFRBdiYD2BuAbKvvDPH2U2ynw4AN5mujn3dwVAke/ORt3MDJepnaqz8Ja9QELV2Y/awYfMKIhiuHiDV2pCB60DR1tICYj/N6ov++iRZmS4nHC1AHrvJ++Vpf9Qt9GAgLPL5XSKvrqrST+/AQmm9n09h/cQWZDLuBVlwpGpk0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=mR5RyS9C; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="mR5RyS9C" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=xHAzWrLppnd1qY7HWbrjONaXT11vwpbQpr85CaG0W+c=; b=mR5RyS9CCuNYAjuw7S/j2YJ+ob UQQQ6Ff6Px910GxRsdifWZqCxJo/Cb1ngYGnxJLGnIoTf/G3s9Sqiqlr9cDCCPLoyoVcq+2Ccojh/ Zw/Mu53dp7bpw1Rj6Bn2q9eiyNNjEBqieE8Z8Z/yeLFIenlsaecMAmZt3g2UkC2LVQ+3ib087V50u pyy8ICCrhp5T42J2InjhaCKBKnzRbKnN2L0+gx2/xEcVUncdygPWpJ0ER5bMkfWb22i44dQkOsIBD BPnetJx32TNIIV3EE/yqejjcdjWnwbTo2dAVibctdGwNFuNg21fnpIkKltY+MFm94DD+mb5F7qd6N pf+WCslw==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vXo8n-0000000CFGM-0cch; Mon, 22 Dec 2025 22:12:33 +0000 Date: Mon, 22 Dec 2025 22:12:32 +0000 From: Matthew Wilcox To: Jiaqi Yan Cc: jackmanb@google.com, hannes@cmpxchg.org, linmiaohe@huawei.com, ziy@nvidia.com, harry.yoo@oracle.com, nao.horiguchi@gmail.com, david@redhat.com, lorenzo.stoakes@oracle.com, william.roche@oracle.com, tony.luck@intel.com, wangkefeng.wang@huawei.com, jane.chu@oracle.com, akpm@linux-foundation.org, osalvador@suse.de, muchun.song@linux.dev, rientjes@google.com, duenwen@google.com, jthoughton@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com Subject: Re: [PATCH v2 3/3] mm/memory-failure: simplify __page_handle_poison Message-ID: References: <20251219183346.3627510-1-jiaqiyan@google.com> <20251219183346.3627510-4-jiaqiyan@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: <20251219183346.3627510-4-jiaqiyan@google.com> On Fri, Dec 19, 2025 at 06:33:46PM +0000, Jiaqi Yan wrote: > Now that no HWPoison page will be given away to buddy allocator > at the end of dissolve_free_hugetlb_folio, there is no need to > drain_all_pages and take_page_off_buddy anymore, so remove them. What if we discover a hardware error in a page which is currently in the buddy system? Why don't we need to remove that page from the buddy system?