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Wed, 13 Oct 2021 13:23:58 +0000 (GMT) Received: from [9.43.38.58] (unknown [9.43.38.58]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 13 Oct 2021 13:23:57 +0000 (GMT) Message-ID: Date: Wed, 13 Oct 2021 18:53:55 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [RFC PATCH] mm/mempolicy: add MPOL_PREFERRED_STRICT memory policy Content-Language: en-US To: Andi Kleen , linux-mm@kvack.org Cc: akpm@linux-foundation.org, Ben Widawsky , Dave Hansen , Feng Tang , Michal Hocko , Andrea Arcangeli , Mel Gorman , Mike Kravetz , Randy Dunlap , Vlastimil Babka , Dan Williams , Huang Ying References: <20211013094539.962357-1-aneesh.kumar@linux.ibm.com> <83483424-e617-51c4-d55c-6106e66e2659@linux.intel.com> From: "Aneesh Kumar K.V" In-Reply-To: <83483424-e617-51c4-d55c-6106e66e2659@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: KuHhXFWW4orwDX74EYINs9COe5ejI14R X-Proofpoint-ORIG-GUID: nDZuOmx_iMq-4tZ_RdNYURYeZWD2gpSw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-10-13_05,2021-10-13_02,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 bulkscore=0 malwarescore=0 suspectscore=0 phishscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110130088 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 1F3043000100 X-Stat-Signature: o9nt98qkdjzghmgnrm9q3pxkdzn9a1fs Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=BsQr8l+9; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf09.hostedemail.com: domain of aneesh.kumar@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=aneesh.kumar@linux.ibm.com X-HE-Tag: 1634131466-687564 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 10/13/21 18:46, Andi Kleen wrote: > >> The difference with MPOL_BIND is the ability to specify a preferred node >> which is the first node in the nodemask argument passed. > > That's always the one with the lowest number. Isn't that quite limiting > in practice? > > It seems if you really want to do that you would need another argument. > Yes. But that would make it a new syscall. Should we do that? -aneesh