From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx184.postini.com [74.125.245.184]) by kanga.kvack.org (Postfix) with SMTP id 4562B6B0062 for ; Tue, 25 Sep 2012 14:11:25 -0400 (EDT) From: Andrea Arcangeli Subject: [PATCH] thp: avoid VM_BUG_ON page_count(page) false positives in __collapse_huge_page_copy Date: Tue, 25 Sep 2012 20:11:17 +0200 Message-Id: <1348596678-2768-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: linux-mm@kvack.org, Rik van Riel , Johannes Weiner , Hugh Dickins , Mel Gorman , Petr Holasek Some time ago Petr once reproduced a false positive VM_BUG_ON in khugepaged while running the autonuma-benchmark on a large 8 node system. All production kernels out there have DEBUG_VM=n so it was only noticeable on self built kernels. It's not easily reproducible even on the 8 nodes system. This patch removes the false positive and it has been tested for a while and it's good idea to queue it for upstream too. It's not urgent and probably not worth it for -stable, though it wouldn't hurt. On smaller systems it's not reproducible AFIK. Andrea Arcangeli (1): thp: avoid VM_BUG_ON page_count(page) false positives in __collapse_huge_page_copy mm/huge_memory.c | 19 ++++++++++++++++++- 1 files changed, 18 insertions(+), 1 deletions(-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org