From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965602AbbKDPB2 (ORCPT ); Wed, 4 Nov 2015 10:01:28 -0500 Received: from mx2.suse.de ([195.135.220.15]:53114 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965325AbbKDPB0 (ORCPT ); Wed, 4 Nov 2015 10:01:26 -0500 From: Vlastimil Babka To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Joonsoo Kim , Minchan Kim , Sasha Levin , "Kirill A. Shutemov" , Mel Gorman , Vlastimil Babka Subject: [PATCH 0/5] page_owner improvements for debugging Date: Wed, 4 Nov 2015 16:00:56 +0100 Message-Id: <1446649261-27122-1-git-send-email-vbabka@suse.cz> X-Mailer: git-send-email 2.6.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I know it's merge window, but this might potentially help us with some outstanding bugs if page_owner was enabled e.g. for trinity runs, so here you go. Patch 1 is a bug fix, patch 2 reduces page_owner overhead when compiled in but not enabled on boot. Patch 3 is something I suggested before [1] and it was deemed a good idea, that the page_owner info should follow the page during migration. Patch 4 allows us again to know that a migration happened and for which reason. Patch 5 will hopefully help us when debugging, as it makes all the info be printed as part of e.g. VM_BUG_ON_PAGE(). Until now it was only accessible via /sys file. Patches are based on today's -next. Hugh's migration patches caused conflicts for patches 3 and 4 when rebasing from 4.3. [1] https://lkml.org/lkml/2015/7/23/47 Vlastimil Babka (5): mm, page_owner: print migratetype of a page, not pageblock mm, page_owner: convert page_owner_inited to static key mm, page_owner: copy page owner info during migration mm, page_owner: track last migrate reason mm, page_owner: dump page owner info from dump_page() Documentation/vm/page_owner.txt | 9 +++--- include/linux/page_ext.h | 1 + include/linux/page_owner.h | 50 ++++++++++++++++++++++++--------- mm/debug.c | 2 ++ mm/migrate.c | 11 ++++++-- mm/page_owner.c | 61 +++++++++++++++++++++++++++++++++++++---- mm/vmstat.c | 2 +- 7 files changed, 110 insertions(+), 26 deletions(-) -- 2.6.2