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Tue, 26 Mar 2019 09:16:12 +0000 Received: from SG2PR02MB3098.apcprd02.prod.outlook.com ([fe80::f432:20e4:2d22:e60b]) by SG2PR02MB3098.apcprd02.prod.outlook.com ([fe80::f432:20e4:2d22:e60b%4]) with mapi id 15.20.1730.019; Tue, 26 Mar 2019 09:16:12 +0000 From: Pankaj Suryawanshi To: Michal Hocko CC: Kirill Tkhai , Vlastimil Babka , "aneesh.kumar@linux.ibm.com" , "linux-kernel@vger.kernel.org" , "minchan@kernel.org" , "linux-mm@kvack.org" , "khandual@linux.vnet.ibm.com" Subject: Re: [External] Re: vmscan: Reclaim unevictable pages Thread-Topic: [External] Re: vmscan: Reclaim unevictable pages Thread-Index: AQHU3WaYCAMWaFadm0e/0+hd2XPYGaYRGYZ/gAAG5oCAAAD82oAAAx4AgAABDq2AAAzwgIAC47DNgAmAbsCAABOgAIAAA15X Date: Tue, 26 Mar 2019 09:16:11 +0000 Message-ID: References: <0b86dbca-cbc9-3b43-e3b9-8876bcc24f22@suse.cz> <56862fc0-3e4b-8d1e-ae15-0df32bf5e4c0@virtuozzo.com> <4c05dda3-9fdf-e357-75ed-6ee3f25c9e52@virtuozzo.com> <09b6ee71-0007-7f1d-ac80-7e05421e4ec6@virtuozzo.com> ,<20190326090142.GH28406@dhcp22.suse.cz> In-Reply-To: <20190326090142.GH28406@dhcp22.suse.cz> Accept-Language: en-GB, en-US Content-Language: en-GB X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=pankaj.suryawanshi@einfochips.com; 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Vlastimil Babka; aneesh.kumar@linux.ibm.com; linux-kernel= @vger.kernel.org; minchan@kernel.org; linux-mm@kvack.org; khandual@linux.vn= et.ibm.com Subject: Re: [External] Re: vmscan: Reclaim unevictable pages [You were asked to use a reasonable quoting several times. This is really annoying because it turns the email thread into a complete mess] [Already fix the email client, but dont know the reason for quoting Maybe a= ccount issue.] On Tue 26-03-19 07:53:14, Pankaj Suryawanshi wrote: > Is there anyone who is familiar with this? Please Comment. Not really. You are observing an unexpected behavior of the page reclaim which hasn't changed for quite some time. So I find more probable that your non-vanilla kernel is doing something unexpected. It would help if you could track down how does the unevictable page get down to the reclaim path. I assume this is a CMA page or something like that but those shouldn't get to the reclaim path AFIR. As i said earlier, i am using vanilla kernel 4.14.65. -- Michal Hocko SUSE Labs ***************************************************************************= ***************************************************************************= ******* eInfochips Business Disclaimer: This e-mail message and all attachm= ents transmitted with it are intended solely for the use of the addressee a= nd may contain legally privileged and confidential information. If the read= er of this message is not the intended recipient, or an employee or agent r= esponsible for delivering this message to the intended recipient, you are h= ereby notified that any dissemination, distribution, copying, or other use = of this message or its attachments is strictly prohibited. If you have rece= ived this message in error, please notify the sender immediately by replyin= g to this message and please delete it from your computer. 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