• Cyrill Gorcunov's avatar
    mm: migration: do not lose soft dirty bit if page is in migration state · c3d16e16
    Cyrill Gorcunov authored
    If page migration is turned on in config and the page is migrating, we
    may lose the soft dirty bit.  If fork and mprotect are called on
    migrating pages (once migration is complete) pages do not obtain the
    soft dirty bit in the correspond pte entries.  Fix it adding an
    appropriate test on swap entries.
    Signed-off-by: default avatarCyrill Gorcunov <gorcunov@openvz.org>
    Cc: Pavel Emelyanov <xemul@parallels.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Matt Mackall <mpm@selenic.com>
    Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
    Cc: Marcelo Tosatti <mtosatti@redhat.com>
    Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
    Cc: Stephen Rothwell <sfr@canb.auug.org.au>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
    Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    c3d16e16
migrate.c 44.7 KB