linux/arch/mips
Eric B Munson b0f205c2a3 mm: mlock: add mlock flags to enable VM_LOCKONFAULT usage
The previous patch introduced a flag that specified pages in a VMA should
be placed on the unevictable LRU, but they should not be made present when
the area is created.  This patch adds the ability to set this state via
the new mlock system calls.

We add MLOCK_ONFAULT for mlock2 and MCL_ONFAULT for mlockall.
MLOCK_ONFAULT will set the VM_LOCKONFAULT modifier for VM_LOCKED.
MCL_ONFAULT should be used as a modifier to the two other mlockall flags.
When used with MCL_CURRENT, all current mappings will be marked with
VM_LOCKED | VM_LOCKONFAULT.  When used with MCL_FUTURE, the mm->def_flags
will be marked with VM_LOCKED | VM_LOCKONFAULT.  When used with both
MCL_CURRENT and MCL_FUTURE, all current mappings and mm->def_flags will be
marked with VM_LOCKED | VM_LOCKONFAULT.

Prior to this patch, mlockall() will unconditionally clear the
mm->def_flags any time it is called without MCL_FUTURE.  This behavior is
maintained after adding MCL_ONFAULT.  If a call to mlockall(MCL_FUTURE) is
followed by mlockall(MCL_CURRENT), the mm->def_flags will be cleared and
new VMAs will be unlocked.  This remains true with or without MCL_ONFAULT
in either mlockall() invocation.

munlock() will unconditionally clear both vma flags.  munlockall()
unconditionally clears for VMA flags on all VMAs and in the mm->def_flags
field.

Signed-off-by: Eric B Munson <emunson@akamai.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-05 19:34:48 -08:00
..
alchemy genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ar7 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
ath25 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ath79 MIPS: ATH79: Add irq chip ar7240-misc-intc 2015-09-22 19:07:11 +02:00
bcm47xx ssb: add Kconfig entry for compiling SoC related code 2015-10-28 21:05:21 +02:00
bcm63xx MIPS: bcm63xx: Use irq_set_handler_locked() 2015-08-26 15:23:29 +02:00
bmips mips/irq: prepare for drivers/irqchip/irqchip.h removal 2015-07-31 20:51:21 +02:00
boot lib/decompressors: use real out buf size for gunzip with kernel 2015-09-10 13:29:01 -07:00
cavium-octeon irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
cobalt MIPS: Cobalt Don't use module_init in non-modular MTD registration. 2015-06-21 22:14:30 +02:00
configs mips: pistachio_defconfig: remove CONFIG_MMC_DW_IDMAC 2015-10-26 16:00:17 +01:00
dec MIPS: DEC: Do not set up the FPU interrupt if no FPU 2015-04-08 01:10:46 +02:00
emma
fw MIPS: ARC: Use __noreturn / unreachable in ARC termination functions. 2015-01-13 16:04:27 +01:00
include mm: mlock: add mlock flags to enable VM_LOCKONFAULT usage 2015-11-05 19:34:48 -08:00
jazz MIPS: Jazz: Migrate to new 'set-state' interface 2015-09-03 12:07:50 +02:00
jz4740 MIPS: Fix the build on jz4740 after removing the custom gpio.h 2015-10-01 09:06:26 +02:00
kernel MIPS: scall: Always run the seccomp syscall filters 2015-10-04 12:10:56 +02:00
kvm KVM: add halt_attempted_poll to VCPU stats 2015-09-16 12:17:00 +02:00
lantiq MIPS: Export get_c0_perfcount_int() 2015-08-03 09:25:18 +02:00
lasat MIPS: Lasat: Move from deprecated __initcall to arch_initcall. 2015-09-03 12:07:49 +02:00
lib MIPS: Rearrange ENTRYLO field definitions 2015-09-03 12:07:48 +02:00
loongson32 MIPS: loongsoon32: Migrate to new 'set-state' interface 2015-09-03 12:07:53 +02:00
loongson64 MIPS: Fix console output for Fulong2e system 2015-09-22 17:25:33 +02:00
math-emu MIPS: math-emu: Remove unused handle_dsemul function declaration 2015-09-03 12:08:15 +02:00
mm MIPS: dma-default: Fix 32-bit fall back to GFP_DMA 2015-09-30 16:27:39 +02:00
mti-malta MIPS: malta: Use generic platform_maar_init 2015-09-03 12:07:41 +02:00
mti-sead3 LED/MIPS: Move SEAD3 LED driver to where it belongs. 2015-11-03 08:59:20 +01:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-20 06:08:27 -07:00
netlogic genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
oprofile MIPS: Add cases for CPU_I6400 2015-08-26 15:23:03 +02:00
paravirt MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pci PCI updates for v4.3: 2015-09-25 11:16:53 -07:00
pistachio clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
pmcs-msp71xx MIPS: irq: Use access helper irq_data_get_affinity_mask() 2015-08-26 15:23:28 +02:00
pnx833x MIPS: PNX833x: Remove checks for CONFIG_I2C_PNX0105 2014-05-23 15:12:39 +02:00
power MIPS: Hibernate: flush TLB entries earlier 2015-04-10 15:41:52 +02:00
ralink clocksource: cosmetic: Drop OF 'dependency' from symbols 2015-10-01 02:18:39 +02:00
rb532 MIPS: Remove all the uses of custom gpio.h 2015-09-03 12:08:02 +02:00
sgi-ip22 MIPS: ip22-gio: Remove legacy suspend/resume support 2015-02-20 13:30:55 +01:00
sgi-ip27 MIPS: IP27: Migrate to new 'set-state' interface 2015-09-03 12:07:54 +02:00
sgi-ip32 MIPS: IP32: Fix build errors in reset code in DS1685 platform hook. 2015-05-13 00:01:41 +02:00
sibyte MIPS: Sibyte: Move bus watcher from deprecated __initcall to device_initcall 2015-09-03 12:07:49 +02:00
sni MIPS: sni: Migrate to new 'set-state' interface 2015-09-03 12:07:54 +02:00
txx9 MIPS: Remove all the uses of custom gpio.h 2015-09-03 12:08:02 +02:00
vr41xx MIPS/IRQCHIP: Move irq_chip from arch/mips to drivers/irqchip. 2015-06-21 21:52:50 +02:00
Kbuild MIPS: net: Add BPF JIT 2014-05-30 16:10:20 +02:00
Kbuild.platforms MIPS: Loongson: Naming style cleanup and rework 2015-06-21 21:53:59 +02:00
Kconfig kexec: split kexec_load syscall from kexec core code 2015-09-10 13:29:01 -07:00
Kconfig.debug MIPS: Drop CONFIG_RUNTIME_DEBUG & debug.h 2015-08-26 15:23:36 +02:00
Makefile MIPS: SB1: Remove support for Pass 1 parts. 2015-07-14 21:47:34 +02:00