Commit 2739b6d1 authored May 09, 2012 by Christian Borntraeger Committed by Martin Schwidefsky May 16, 2012

s390/kvm: bad rss-counter state



commit c3f0327f
    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 <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent ae73c76a

arch/s390/mm/pgtable.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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)