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Michael S. Tsirkin f822566165 [PATCH] madvise MADV_DONTFORK/MADV_DOFORK ... Currently, copy-on-write may change the physical address of a page even if the user requested that the page is pinned in memory (either by mlock or by get_user_pages). This happens if the process forks meanwhile, and the parent writes to that page. As a result, the page is orphaned: in case of get_user_pages, the application will never see any data hardware DMA's into this page after the COW. In case of mlock'd memory, the parent is not getting the realtime/security benefits of mlock. In particular, this affects the Infiniband modules which do DMA from and into user pages all the time. This patch adds madvise options to control whether memory range is inherited across fork. Useful e.g. for when hardware is doing DMA from/into these pages. Could also be useful to an application wanting to speed up its forks by cutting large areas out of consideration. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Acked-by: Hugh Dickins <hugh@veritas.com> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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arc	…
ddb5xxx	…
dec	…
galileo-boards	…
ip32	[MIPS] IP32: Fix sparse warnings.	19 years ago
it8172	…
jmr3927	…
lasat	…
mach-atlas	…
mach-au1x00	[MIPS] Au1200: Make KGDB compile	19 years ago
mach-cobalt	[MIPS] CPU definitions for Cobalt.	19 years ago
mach-db1x00	[MIPS] Add missing arch defines for the Alchemy MTD driver.	19 years ago
mach-ddb5074	…
mach-dec	…
mach-ev64120	…
mach-ev96100	…
mach-generic	[MIPS] RM200: Give RM200 it's own timex.h.	19 years ago
mach-ip22	MIPS: Introduce machinery for testing for MIPSxxR1/2.	19 years ago
mach-ip27	[PATCH] scheduler cache-hot-autodetect	19 years ago
mach-ip32	[MIPS] Nevada support for SGI O2.	19 years ago
mach-ja	MIPS: Introduce machinery for testing for MIPSxxR1/2.	19 years ago
mach-jazz	…
mach-jmr3927	[MIPS] JMR3927: Fix include wrapper symbol.	19 years ago
mach-lasat	…
mach-mips	…
mach-ocelot	…
mach-ocelot3	MIPS: Introduce machinery for testing for MIPSxxR1/2.	19 years ago
mach-pb1x00	[MIPS] Add missing arch defines for the Alchemy MTD driver.	19 years ago
mach-pnx8550	…
mach-qemu	[MIPS] Qemu: Qemu is emulating a 1193.182kHz i8254 PIC.	19 years ago
mach-rm200	[MIPS] RM200: Give RM200 it's own timex.h.	19 years ago
mach-sibyte	…
mach-sim	…
mach-yosemite	MIPS: Introduce machinery for testing for MIPSxxR1/2.	19 years ago
mips-boards	[MIPS] SEAD: More build fixes.	19 years ago
pci	…
sgi	…
sibyte	…
sn	…
tx4927	[MIPS] TX49x7: Fix reporting of the CPU name and PCI clock	19 years ago
tx4938	…
vr41xx	Update Yoichi Yuasa's email address.	19 years ago
xtalk	…
8253pit.h	…
a.out.h	…
abi.h	[MIPS] Make do_signal return void.	19 years ago
addrspace.h	…
asm.h	…
asmmacro-32.h	…
asmmacro-64.h	…
asmmacro.h	…
atomic.h	MIPS: Get rid of atomic_lock.	19 years ago
auxvec.h	…
bcache.h	…
bitops.h	[MIPS] Cleanup fls implementation.	19 years ago
bootinfo.h	…
branch.h	…
break.h	…
bug.h	…
bugs.h	…
byteorder.h	[MIPS] MIPS R2 optimized endianess swapping.	19 years ago
cache.h	[PATCH] Kill L1_CACHE_SHIFT_MAX	19 years ago
cachectl.h	…
cacheflush.h	[MIPS] Remove wrong __user tags.	19 years ago
cacheops.h	…
checksum.h	…
compat.h	…
compiler.h	…
cpu-features.h	MIPS: Reorganize ISA constants strictly as bitmasks.	19 years ago
cpu-info.h	…
cpu.h	[MIPS] Fix CPU type bitmasks for MIPS III, IV and V.	19 years ago
cputime.h	…
current.h	…
ddb5074.h	…
debug.h	…
delay.h	MIPS: Fix mdelay(1) for 64bit kernel with HZ == 1000	19 years ago
div64.h	…
dma-mapping.h	…
dma.h	…
ds1286.h	…
dsp.h	MIPS: DSP: Set all register masks to 0x3ff.	19 years ago
elf.h	MIPS: Namespace pollution: dump_regs() -> elf_dump_regs()	19 years ago
emergency-restart.h	…
errno.h	…
fcntl.h	…
fixmap.h	…
floppy.h	…
fpregdef.h	…
fpu.h	…
fpu_emulator.h	…
futex.h	…
gdb-stub.h	…
gfx.h	…
gt64120.h	…
gt64240.h	…
hardirq.h	…
hazards.h	[MIPS] Fix C version of ssnop to use the right opcode.	19 years ago
highmem.h	…
hw_irq.h	…
i8259.h	…
ide.h	…
inst.h	…
interrupt.h	[MIPS] TX49 MFC0 bug workaround	19 years ago
inventory.h	…
io.h	Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus	19 years ago
ioctl.h	…
ioctls.h	…
ipc.h	…
ipcbuf.h	…
irq.h	…
irq_cpu.h	…
isadep.h	…
it8712.h	…
jazz.h	…
jazzdma.h	…
kmap_types.h	…
linkage.h	…
local.h	…
m48t35.h	…
m48t37.h	…
marvell.h	…
mc146818-time.h	…
mc146818rtc.h	…
mipsmtregs.h	…
mipsprom.h	…
mipsregs.h	MIPS: DSP: Put mask field into the right place.	19 years ago
mman.h	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	19 years ago
mmu.h	…
mmu_context.h	…
mmzone.h	…
module.h	…
msc01_ic.h	…
msgbuf.h	…
mutex.h	[PATCH] mutex subsystem, add default include/asm-*/mutex.h files	19 years ago
namei.h	…
nile4.h	…
numnodes.h	…
paccess.h	…
page.h	…
param.h	…
parport.h	…
pci.h	…
percpu.h	…
pgalloc.h	…
pgtable-32.h	…
pgtable-64.h	…
pgtable-bits.h	…
pgtable.h	…
pmon.h	…
poll.h	…
posix_types.h	…
prctl.h	…
prefetch.h	…
processor.h	[PATCH] mips: task_stack_page()	19 years ago
ptrace.h	…
qemu.h	…
r4kcache.h	[MIPS] Add protected_blast_icache_range, blast_icache_range, etc.	19 years ago
reboot.h	[MIPS] Rename _machine_power_off to pm_power_off so the kernel builds again.	19 years ago
reg.h	…
regdef.h	…
resource.h	…
rtc.h	…
rtlx.h	…
scatterlist.h	…
sections.h	…
segment.h	…
semaphore.h	…
sembuf.h	…
serial.h	…
setup.h	…
sgialib.h	…
sgiarcs.h	…
sgidefs.h	…
shmbuf.h	…
shmparam.h	…
sigcontext.h	…
siginfo.h	…
signal.h	[MIPS] Delete duplicate definitions of break codes.	19 years ago
sim.h	…
smp.h	…
sni.h	…
socket.h	…
sockios.h	…
spinlock.h	…
spinlock_types.h	…
stackframe.h	…
stat.h	…
statfs.h	…
string.h	[MIPS] Remove buggy inline version of memscan.	19 years ago
suspend.h	…
sysmips.h	…
system.h	[PATCH] mips: task_pt_regs()	19 years ago
termbits.h	…
termios.h	…
thread_info.h	[MIPS] Add support for TIF_RESTORE_SIGMASK.	19 years ago
time.h	…
timex.h	…
titan_dep.h	…
tlb.h	…
tlbdebug.h	…
tlbflush.h	…
topology.h	…
traps.h	…
tx3912.h	…
types.h	…
uaccess.h	[MIPS] More uaccess.h fixes with gcc >= 4.0.1.	19 years ago
ucontext.h	…
unaligned.h	…
unistd.h	[MIPS] Fold non-__mips64 case into CONFIG_32BIT case.	19 years ago
user.h	…
vga.h	…
war.h	…
watch.h	…
wbflush.h	…
xor.h	…
xxs1500.h	…