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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 16 Dec 2019 08:25:26 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xBG8PPQ143647108 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 16 Dec 2019 08:25:25 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 91DDAA405B; Mon, 16 Dec 2019 08:25:25 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E7EEEA405F; Mon, 16 Dec 2019 08:25:24 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.212]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 16 Dec 2019 08:25:24 +0000 (GMT) Subject: Re: [PATCH v3 00/15] KVM: Dynamically size memslot arrays To: Sean Christopherson , James Hogan , Paul Mackerras , Janosch Frank , Paolo Bonzini , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Marc Zyngier References: <20191024230744.14543-1-sean.j.christopherson@intel.com> <20191203221433.GK19877@linux.intel.com> <20191213200151.GF31552@linux.intel.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.0 MIME-Version: 1.0 In-Reply-To: <20191213200151.GF31552@linux.intel.com> Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 19121608-0008-0000-0000-000003414B55 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19121608-0009-0000-0000-00004A6156B0 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-16_01:2019-12-16,2019-12-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912160075 Cc: Wanpeng Li , kvm@vger.kernel.org, David Hildenbrand , Joerg Roedel , Cornelia Huck , linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Vitaly Kuznetsov , kvmarm@lists.cs.columbia.edu, Jim Mattson X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 13.12.19 21:01, Sean Christopherson wrote: > On Tue, Dec 03, 2019 at 02:14:33PM -0800, Sean Christopherson wrote: >> On Thu, Oct 24, 2019 at 04:07:29PM -0700, Sean Christopherson wrote: >>> The end goal of this series is to dynamically size the memslot array so >>> that KVM allocates memory based on the number of memslots in use, as >>> opposed to unconditionally allocating memory for the maximum number of >>> memslots. On x86, each memslot consumes 88 bytes, and so with 2 address >>> spaces of 512 memslots, each VM consumes ~90k bytes for the memslots. >>> E.g. given a VM that uses a total of 30 memslots, dynamic sizing reduces >>> the memory footprint from 90k to ~2.6k bytes. >>> >>> The changes required to support dynamic sizing are relatively small, >>> e.g. are essentially contained in patches 14/15 and 15/15. Patches 1-13 >>> clean up the memslot code, which has gotten quite crusty, especially >>> __kvm_set_memory_region(). The clean up is likely not strictly necessary >>> to switch to dynamic sizing, but I didn't have a remotely reasonable >>> level of confidence in the correctness of the dynamic sizing without first >>> doing the clean up. >>> >>> Christoffer, I added your Tested-by to the patches that I was confident >>> would be fully tested based on the desription of what you tested. Let me >>> know if you disagree with any of 'em. >>> >>> v3: >>> - Fix build errors on PPC and MIPS due to missed params during >>> refactoring [kbuild test robot]. >>> - Rename the helpers for update_memslots() and add comments describing >>> the new algorithm and how it interacts with searching [Paolo]. >>> - Remove the unnecessary and obnoxious warning regarding memslots being >>> a flexible array [Paolo]. >>> - Fix typos in the changelog of patch 09/15 [Christoffer]. >>> - Collect tags [Christoffer]. >>> >>> v2: >>> - Split "Drop kvm_arch_create_memslot()" into three patches to move >>> minor functional changes to standalone patches [Janosch]. >>> - Rebase to latest kvm/queue (f0574a1cea5b, "KVM: x86: fix ...") >>> - Collect an Acked-by and a Reviewed-by >> >> Paolo, do you want me to rebase this to the latest kvm/queue? > > Ping. > > Applies cleanly on the current kvm/queue and nothing caught fire in > testing (though I only re-tested the series as a whole). Do you have the latest version somewhere on a branch? The version on the list no longer applies cleanly. _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm