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

..

alchemy

Merge tag 'mips_4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

2017-02-21 14:21:11 -08:00

ar7

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

ath25

genirq: Remove irq argument from irq flow handlers

2015-09-16 15:47:51 +02:00

ath79

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

bcm47xx

MIPS: BCM47XX: Fix button inversion for Asus WL-500W

2017-02-17 11:16:46 +00:00

bcm63xx

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

bmips

MIPS: BMIPS: Support APPENDED_DTB

2016-10-06 17:31:02 +02:00

boot

MIPS: DTS: Add img directory to Makefile

2017-02-17 11:16:46 +00:00

cavium-octeon

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2017-02-22 10:15:09 -08:00

cobalt

MIPS: Cobalt: Fix typo

2016-08-03 08:16:30 +02:00

configs

Merge tag 'mips_4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

2017-02-21 14:21:11 -08:00

dec

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

emma

MIPS: Avoid old-style declaration

2017-01-25 02:51:11 +01:00

fw

MIPS: Fix misspellings in comments.

2016-04-03 12:32:09 +02:00

generic

MIPS: generic/kexec: add support for a DTB passed in a separate buffer

2017-01-03 16:34:46 +01:00

include

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2017-02-22 18:22:53 -08:00

jazz

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

jz4740

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

kernel

userfaultfd: non-cooperative: add event for memory unmaps

2017-02-24 17:46:55 -08:00

kvm

KVM: race-free exit from KVM_RUN without POSIX signals

2017-02-17 12:27:37 +01:00

lantiq

MIPS: Lantiq: Keep ethernet enabled during boot

2017-02-17 11:14:29 +00:00

lasat

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

lib

MIPS: Fix modversions

2017-01-24 18:30:35 +01:00

loongson32

MIPS: Loongson1B: Change the OSC clock name

2017-01-03 16:48:40 +01:00

loongson64

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

math-emu

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

mm

Merge tag 'mips_kvm_4.11_1' into mips-for-linux-next

2017-02-13 18:57:31 +00:00

mti-malta

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

net

treewide: remove redundant #include <linux/kconfig.h>

2016-10-11 15:06:33 -07:00

netlogic

MIPS: Avoid old-style declaration

2017-01-25 02:51:11 +01:00

oprofile

MIPS: Unify perf counter register definitions

2017-02-14 09:00:24 +00:00

paravirt

MIPS: SMP: Don't increment irq_count multiple times for call function IPIs

2015-08-03 09:25:12 +02:00

pci

MIPS: TXx9: Modernize printing of kernel messages

2017-01-03 16:34:32 +01:00

pic32

MIPS: pic32mzda: Fix linker error for pic32_get_pbclk()

2017-02-17 11:14:29 +00:00

pistachio

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2016-08-06 09:13:11 -04:00

pmcs-msp71xx

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

pnx833x

MIPS: Squash lines for simple wrapper functions

2016-10-04 16:13:57 +02:00

power

…

ralink

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

rb532

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

sgi-ip22

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

sgi-ip27

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

sgi-ip32

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

sibyte

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

sni

char/genrtc: remove asm-generic/rtc.h from mips

2016-06-04 00:23:36 +02:00

txx9

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

vdso

MIPS: VDSO: Explicitly use -fno-asynchronous-unwind-tables

2017-02-17 11:32:12 +00:00

vr41xx

MIPS: Audit and remove any unnecessary uses of module.h

2017-02-14 09:00:25 +00:00

xilfpga

MIPS: xilfpga: Use irqchip instead of the legacy way

2017-01-03 16:34:39 +01:00

Kbuild

MIPS: Initial implementation of a VDSO

2015-11-11 08:36:36 +01:00

Kbuild.platforms

MIPS: generic: Convert SEAD-3 to a generic board

2016-10-06 18:04:20 +02:00

Kconfig

Merge tag 'mips_4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

2017-02-21 14:21:11 -08:00

Kconfig.debug

MIPS: Remove compact branch policy Kconfig entries

2016-09-13 14:14:50 +02:00

Makefile

MIPS: Disable stack checks on MIPS kernels

2017-02-14 09:00:23 +00:00

Makefile.postlink

MIPS: Fix distclean with Makefile.postlink

2017-02-13 18:57:34 +00:00