From: Christian Borntraeger Date: Wed, 9 May 2012 14:27:38 +0000 (+0200) Subject: s390/kvm: bad rss-counter state X-Git-Tag: firefly_0821_release~3680^2~2867^2~29 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2739b6d12407792f253b7a15233930338e6831c9;p=firefly-linux-kernel-4.4.55.git s390/kvm: bad rss-counter state commit c3f0327f8e9d7a503f0d64573c311eddd61f197d mm: add rss counters consistency check detected the following problem with kvm on s390: BUG: Bad rss-counter state mm:00000004f73ef000 idx:0 val:-10 BUG: Bad rss-counter state mm:00000004f73ef000 idx:1 val:-5 We have to make sure that we accumulate all rss values into the mm before we replace the mm to avoid triggering this (harmless) bug message. Signed-off-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 6e765bf00670..a3db5a3ea083 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -822,6 +822,8 @@ int s390_enable_sie(void) /* we copy the mm and let dup_mm create the page tables with_pgstes */ tsk->mm->context.alloc_pgste = 1; + /* make sure that both mms have a correct rss state */ + sync_mm_rss(tsk->mm); mm = dup_mm(tsk); tsk->mm->context.alloc_pgste = 0; if (!mm)