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received-spf: None (protection.outlook.com: fb.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: bCVpPbS9kR6oJYAPqI7i5Yw2PEChqmQYjjQmeJUnxayNT3jDlfB+tU4VvwCf5Y/P/dJP+8IxhhdXgnK9o+vHWVTqsvpZyFQfV23oduzlkOvLV9Tsj01IP8iE2o7gzJccMMWdMmUzO9TeLhhM9UEz8I58DzJNpUzcGugNBSnxOUOJEz7z9/c5pKw/dNXIE9kCcKpBjLK3QfUbmtI2bSuMiWS+ducsRsGxOHmrdrNN8TNbrbR4BnGP/d/yraTkt3u0BM7pe5osgXhWZXnBVd/eo6hu+NwoI36v02mLrpiQi3LVPhxL0OQma+Amwlz58pu/goZeTSNU1DixWR7h0rqQrS329DErNo7ohtAuWnny23E= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: <691E3861403A884F9C13E463795DDAC2@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: d0fa8820-411f-4bf3-51c1-08d638303557 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Oct 2018 15:08:22.9629 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR15MB0791 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-10-22_11:,, signatures=0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 22, 2018 at 10:33:22AM +0200, Michal Hocko wrote: > Cc som more people. >=20 > I am wondering why 172b06c32b94 ("mm: slowly shrink slabs with a > relatively small number of objects") has been backported to the stable > tree when not marked that way. Put that aside it seems likely that the > upstream kernel will have the same issue I suspect. Roman, could you > have a look please? Sure, already looking... Spock provided some useful details, and I think, I know what's happening... Hope to propose a solution soon. RE backporting: I'm slightly surprised that only one patch of the memcg reclaim fix series has been backported. Either all or none makes much more sense to me. Thanks!