Mike Rapoport 897ab3e0c4 userfaultfd: non-cooperative: add event for memory unmaps ... When a non-cooperative userfaultfd monitor copies pages in the background, it may encounter regions that were already unmapped. Addition of UFFD_EVENT_UNMAP allows the uffd monitor to track precisely changes in the virtual memory layout. Since there might be different uffd contexts for the affected VMAs, we first should create a temporary representation for the unmap event for each uffd context and then notify them one by one to the appropriate userfault file descriptors. The event notification occurs after the mmap_sem has been released. [arnd@arndb.de: fix nommu build] Link: http://lkml.kernel.org/r/20170203165141.3665284-1-arnd@arndb.de [mhocko@suse.com: fix nommu build] Link: http://lkml.kernel.org/r/20170202091503.GA22823@dhcp22.suse.cz Link: http://lkml.kernel.org/r/1485542673-24387-3-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-02-24 17:46:55 -08:00
..
compat_mq.c
compat.c
ipc_sysctl.c
Makefile
mq_sysctl.c
mqueue.c	sched/wake_q: Rename WAKE_Q to DEFINE_WAKE_Q	2016-11-21 10:29:01 +01:00
msg.c	ipc: msg, make msgrcv work with LONG_MIN	2016-12-14 16:04:08 -08:00
msgutil.c	ipc: account for kmem usage on mqueue and msg	2016-10-27 18:43:43 -07:00
namespace.c	Merge branch 'nsfs-ioctls' into HEAD	2016-09-22 20:00:36 -05:00
sem.c	ipc/sem.c: fix incorrect sem_lock pairing	2017-01-10 18:31:55 -08:00
shm.c	userfaultfd: non-cooperative: add event for memory unmaps	2017-02-24 17:46:55 -08:00
syscall.c
util.c
util.h