From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 C9C1E14A4F9 for ; Fri, 16 May 2025 14:08:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747404485; cv=none; b=L0dcTTTlvtJHE0/iBMo+M6C2jalwTJLvij4YI0q5NH++peAjjQSkVGNIzzTPMLGPKz6Yu1XqAV0w60f+rvwBEHqi1/Nx4WbzHaQXjZoKhfuV3/cnVKEXBImos0CDfbJYkEGF3EALQ1z4TOhTefTp1dV3oTlNRfabzHweqxu3xtU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747404485; c=relaxed/simple; bh=RK9aBFyd79+Q/HcASRcOyCtzdOyDdFJ0ghx50/zDN/w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nw9S+NbBXWgpmy2Kgmk5OxTfBLHN2iF41LMLoNQKbc+W7kHR85UO+YuvIS/wF64/8Fp7CJoOKuJzoN32QCxo+/2rBtwpNNZp+3+GcOkK38c6f8VzHiH5Y2MmvfXY/0JKN73LKnN/73zv1U1i1P+KUUKERFo4csTLfq+fxTipcVw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=gIy91Ko6; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gIy91Ko6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1747404482; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=Uq6KURHAsdiUcEMvv/uoqzWtUBzSDdD1xyqnhIAzcWM=; b=gIy91Ko6Zbi19nU8rgJ7ljd69lfRlzHvPlJF/eUHAoc0BnklSpLOafokRDt+lOOAWUbOvE MqhyaiFwTAVrNQDdxGSfoWbu1C+BeNjjZKQzXhTCstPTkMuGw2A4BoFLSeX1OZUbS36jZa U2namWy3pu3bg9wntkmxEdQryUqdc78= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-211-WSYYvIcrNxezQtxjp3Oaug-1; Fri, 16 May 2025 10:08:00 -0400 X-MC-Unique: WSYYvIcrNxezQtxjp3Oaug-1 X-Mimecast-MFC-AGG-ID: WSYYvIcrNxezQtxjp3Oaug_1747404480 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-43ce8f82e66so11631965e9.3 for ; Fri, 16 May 2025 07:08:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747404479; x=1748009279; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=Uq6KURHAsdiUcEMvv/uoqzWtUBzSDdD1xyqnhIAzcWM=; b=NWtaU1xyUtJ957F84KJsRGnVMHuYEgNIFtHw/D+Q7RMLYqnyRvESkphur/swKNcHPe f5Y6Xcw5kPY6UYyWn2gECYcdjpOR2JKnVcVOwvcJMKN2VX0hvArHmlWie6OY3jw7WQmE eFXN5f4xe+xZAuq+sKGcf0Plfx92D9w9q41Bx6pZXDeUrY6Mg8HWKKL5OE5TrHn6Dx5j RCvPG5Y5qr8DOOSDqMO5ttWhAeA0zZKg/uFBKBSvznnd/duPiXcYRy/2TC7Etkzs6yhH RpNZzV+YlD4djqaEJVWtGRf2/YX1lNO3VBbYAQLofT/cwqPyrGNSRlnyP/p1hJmmt8z0 VcVg== X-Gm-Message-State: AOJu0YwRtEaiaCp9Y5/OKIdxRd2dhkuKm6NbhcFaOUBIFo9QhjjJuJyu LHT/jYDFf9/TP/SUN+4n0Ho/1RmuanIJCK+0mA/CPqz17e9A4UDG808zXxaU9Pdn43VqIHsQlFe bu+Pnzq2A3M0wL3BC0XQ26euSwO8WVHPEg+MTxSpowhjJSTiA36/qtnrXHr/P0KA= X-Gm-Gg: ASbGnctGEma8bqZciE9wgUv5TnhbtXWijiwDfsJqB/gmuACrf5z/0ySfCLP7A/wNdd6 w9BcDTPIfeZmQsZNyEAtYM7i5G787O7/f4g03pVD6wrtwt6pfVNtmJ0SHRwGa5itj/s+q1mHgDC Te8UBErZS1TP1Iz1Q0dmMVWHiUfcV5o5yT5hNyObq5HrY+trKYCpIgOyJGlLNmgSw6ABnf3WAI/ RkAfba2GX/mpxz38KvJuI7CCZVnBJZRsnBMDlGFuPXru9dNkb5w2NVflwdQA589qY9c/f2FjXFU 1tCuGxdcYqOKsJbFqVv2LbIQROOygxxDHqdGGB1zj1v1UUg8kwk9sc7ZV2FuexppkCfXlODu42d hNeN3SFNjRzm19bYZTJ9PE9Yn/cHNzeq18XrWWrs= X-Received: by 2002:a05:600c:3f07:b0:43d:77c5:9c1a with SMTP id 5b1f17b1804b1-442fd60b516mr39862105e9.4.1747404479444; Fri, 16 May 2025 07:07:59 -0700 (PDT) X-Google-Smtp-Source: AGHT+IErUF+kUAa2DUbbfcj03racps/O2R2c/jJuyRwdI2xUqjpHejuSvMBsI2MJ8NaMr9Z5ueg8yA== X-Received: by 2002:a05:600c:3f07:b0:43d:77c5:9c1a with SMTP id 5b1f17b1804b1-442fd60b516mr39861295e9.4.1747404479012; Fri, 16 May 2025 07:07:59 -0700 (PDT) Received: from ?IPV6:2003:d8:2f47:4700:e6f9:f453:9ece:7602? (p200300d82f474700e6f9f4539ece7602.dip0.t-ipconnect.de. [2003:d8:2f47:4700:e6f9:f453:9ece:7602]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442f39e851bsm111513665e9.28.2025.05.16.07.07.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 16 May 2025 07:07:57 -0700 (PDT) Message-ID: Date: Fri, 16 May 2025 16:07:55 +0200 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 1/3] s390/uv: don't return 0 from make_hva_secure() if the operation was not successful To: linux-kernel@vger.kernel.org Cc: linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Sven Schnelle , Thomas Huth , Matthew Wilcox , Zi Yan , Sebastian Mitterle , stable@vger.kernel.org References: <20250516123946.1648026-1-david@redhat.com> <20250516123946.1648026-2-david@redhat.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250516123946.1648026-2-david@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 16.05.25 14:39, David Hildenbrand wrote: > If s390_wiggle_split_folio() returns 0 because splitting a large folio > succeeded, we will return 0 from make_hva_secure() even though a retry > is required. Return -EAGAIN in that case. > > Otherwise, we'll return 0 from gmap_make_secure(), and consequently from > unpack_one(). In kvm_s390_pv_unpack(), we assume that unpacking > succeeded and skip unpacking this page. Later on, we run into issues > and fail booting the VM. > > So far, this issue was only observed with follow-up patches where we > split large pagecache XFS folios. Maybe it can also be triggered with > shmem? Yes! I can reproduce it when allocating pages outside of the qemu process. $ echo force > /sys/kernel/mm/transparent_hugepage/shmem_enabled $ rm /dev/shm/vm-ram $ fallocate -l 4G /dev/shm/vm-ram $ /usr/libexec/qemu-kvm ... -object memory-backend-file,id=mem0,size=4g,share=on,mem-path=/dev/shm/vm-ram -M memory-backend=mem0 LOADPARM=[ ] Using virtio-blk. Using SCSI scheme. ......................................................................................................................... qemu-kvm: KVM PV command 4 (KVM_PV_VERIFY) failed: header rc 102 rrc 1a IOCTL rc: -22 Protected boot has failed: 0xa02 Guest crashed on cpu 0: disabled-wait PSW: 0x0002000080000000 0x0000000000004608 -- Cheers, David / dhildenb