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>		2006-02-14 16:09:34 -08:00
..
8253pit.h
a.out.h
acpi.h
agp.h
apic.h	[PATCH] x86_64: Allow to run main time keeping from the local APIC interrupt	2006-02-04 16:43:13 -08:00
apicdef.h	[PATCH] x86_64: x86_64 write apic id fix	2006-01-11 19:04:57 -08:00
atomic.h	[PATCH] EDAC: core EDAC support code	2006-01-18 19:20:31 -08:00
auxvec.h
bitops.h	[PATCH] x86_64: fls in asm for x86_64	2006-01-11 19:04:50 -08:00
boot.h
bootsetup.h
bug.h
bugs.h
byteorder.h
cache.h	[PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_align	2006-01-11 19:05:01 -08:00
cacheflush.h
calling.h
checksum.h
compat.h	[PATCH] amd64: task_pt_regs()	2006-01-12 09:08:51 -08:00
cpu.h
cpufeature.h	[PATCH] x86_64: Undo the earlier changes to remove unrolled copy/memset functions	2006-02-04 16:43:13 -08:00
cputime.h
current.h
debugreg.h
delay.h
desc.h	[PATCH] x86_64: Align and pad x86_64 GDT on page boundary	2006-01-11 19:04:53 -08:00
div64.h
dma-mapping.h	[PATCH] x86_64: Use function pointers to call DMA mapping functions	2006-01-11 19:04:55 -08:00
dma.h
dwarf2.h	[PATCH] x86_64: Separate CONFIG_UNWIND_INFO from CONFIG_DEBUG_INFO	2006-01-11 19:01:10 -08:00
e820.h	[PATCH] kdump: x86_64: add memmmap command line option	2006-01-10 08:01:27 -08:00
edac.h	[PATCH] EDAC: core EDAC support code	2006-01-18 19:20:31 -08:00
elf.h
emergency-restart.h
errno.h
fcntl.h
fixmap.h	[PATCH] mark several functions __always_inline	2006-01-14 18:27:15 -08:00
floppy.h
fpu32.h
futex.h
gart-mapping.h	[PATCH] x86_64: Use function pointers to call DMA mapping functions	2006-01-11 19:04:55 -08:00
genapic.h
hardirq.h	[PATCH] i386/x86-64: Don't ack the APIC for bad interrupts when the APIC is not enabled	2006-02-04 16:43:15 -08:00
hpet.h	[PATCH] x86-64: Fix HPET timer on x460	2006-02-11 21:41:11 -08:00
hw_irq.h	[PATCH] x86_64: Remove useless KDB vector	2006-01-11 19:05:00 -08:00
i387.h	[PATCH] amd64: task_thread_info()	2006-01-12 09:08:51 -08:00
ia32.h	[PATCH] x86_64: Flexmap for 32bit and randomized mappings for 64bit	2006-01-16 23:18:35 -08:00
ia32_unistd.h	[PATCH] fstatat64 support	2006-02-11 21:41:10 -08:00
ide.h
idle.h	[PATCH] x86_64: Add idle notifiers	2006-01-11 19:04:55 -08:00
io.h	[PATCH] x86_64: Generalize DMI and enable for x86-64	2006-01-11 19:04:51 -08:00
io_apic.h
ioctl.h	[PATCH] Generic ioctl.h	2006-01-10 08:01:34 -08:00
ioctls.h
ipcbuf.h
ipi.h	[PATCH] x86_64: Remove useless KDB vector	2006-01-11 19:05:00 -08:00
irq.h	[PATCH] x86_64: Increase NR_IRQ_VECTORS to 32 * NR_CPUS	2006-01-16 11:27:59 -08:00
kdebug.h	[PATCH] x86_64: make trap information available to die notification handlers	2006-01-11 19:01:10 -08:00
kexec.h	[PATCH] Compilation of kexec/kdump broken	2006-02-03 08:32:09 -08:00
kmap_types.h
kprobes.h	[PATCH] kprobes: fix build breakage	2006-01-10 08:01:40 -08:00
ldt.h
linkage.h
local.h
mach_apic.h
mc146818rtc.h
mce.h
mman.h	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	2006-02-14 16:09:34 -08:00
mmsegment.h
mmu.h
mmu_context.h	[PATCH] x86_64: cleanup enter_lazy_tlb()	2006-01-11 19:05:00 -08:00
mmx.h
mmzone.h	[PATCH] x86_64: Move NUMA page_to_pfn/pfn_to_page functions out of line	2006-01-11 19:05:01 -08:00
module.h
mpspec.h
msgbuf.h
msi.h
msr.h
mtrr.h
mutex.h	Fix mutex_trylock() copy-and-paste bug (x86, x86-64, generic mutex-dec.h)	2006-01-11 15:50:47 -08:00
namei.h
nmi.h
node.h
numa.h	[PATCH] x86_64: Fix the node cpumask of a cpu going down	2006-02-07 16:12:31 -08:00
numnodes.h
page.h	[PATCH] x86_64: Allow nesting of int3 by default for kprobes	2006-01-16 11:27:58 -08:00
param.h
parport.h
pci-direct.h
pci.h	[PATCH] x86_64: Use function pointers to call DMA mapping functions	2006-01-11 19:04:55 -08:00
pda.h	[PATCH] x86_64: Allocate PDAs in the local node	2006-01-11 19:04:59 -08:00
percpu.h	[PATCH] x86_64: Node local pda take 2 -- cpu_pda preparation	2006-01-11 19:04:59 -08:00
pgalloc.h
pgtable.h	[PATCH] x86_64: "extern inline" -> "static inline" in pgtable.h	2006-01-11 19:04:53 -08:00
poll.h
posix_types.h
prctl.h
processor.h	[PATCH] x86_64: Flexmap for 32bit and randomized mappings for 64bit	2006-01-16 23:18:35 -08:00
proto.h	[PATCH] x86_64: Calibrate APIC timer using PM timer	2006-02-04 16:43:15 -08:00
ptrace.h
resource.h
rtc.h
rwlock.h
scatterlist.h
seccomp.h
sections.h
segment.h	[PATCH] x86_64: Remove unused segments	2006-01-11 19:05:01 -08:00
semaphore.h
sembuf.h
serial.h
setup.h
shmbuf.h
shmparam.h
sigcontext.h
sigcontext32.h
siginfo.h
signal.h
smp.h	[PATCH] x86_64: Fix compile error with !CONFIG_COMPAT	2006-01-11 19:04:57 -08:00
socket.h
sockios.h
sparsemem.h
spinlock.h
spinlock_types.h
stat.h
statfs.h
string.h
suspend.h
swiotlb.h	[PATCH] x86_64: Use function pointers to call DMA mapping functions	2006-01-11 19:04:55 -08:00
system.h	[PATCH] Fix "value computed is not used" compile warnings with gcc-4.1	2006-02-05 11:06:54 -08:00
termbits.h
termios.h
thread_info.h	[PATCH] death of get_thread_info/put_thread_info	2006-01-12 09:08:59 -08:00
timex.h	[PATCH] x86_64: On Intel CPUs don't do an additional CPU sync before RDTSC	2006-01-11 19:04:58 -08:00
tlb.h
tlbflush.h
topology.h	[PATCH] Export cpu topology in sysfs	2006-02-03 08:32:09 -08:00
types.h
uaccess.h	[PATCH] mark several functions __always_inline	2006-01-14 18:27:15 -08:00
ucontext.h
unaligned.h
unistd.h	[PATCH] x86-64: Add sys_unshare	2006-02-08 15:52:15 -08:00
user.h
user32.h
vga.h
vsyscall.h	[PATCH] x86_64: sparse warning cleanups	2006-01-11 19:05:02 -08:00
vsyscall32.h
xor.h