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f822566165
linux/include/asm-v850
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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>
2006-02-14 16:09:34 -08:00
..
a.out.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
anna.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
as85ep1.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
asm.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
atomic.h [PATCH] mutex subsystem, add atomic_xchg() to all arches 2006-01-09 15:59:17 -08:00
auxvec.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
bitops.h [PATCH] include/asm-*/bitops.h: fix more "~0UL >> size" typos 2006-02-03 08:32:02 -08:00
bug.h [PATCH] remove all kernel BUGs 2005-05-01 08:59:01 -07:00
bugs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
byteorder.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cache.h [PATCH] Kill L1_CACHE_SHIFT_MAX 2006-01-08 20:13:39 -08:00
cacheflush.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
checksum.h [PATCH] v850: Update checksum.h to match changed function signatures 2005-07-11 10:22:39 -07:00
clinkage.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cputime.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
current.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
delay.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
div64.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dma-mapping.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dma.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
elf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
emergency-restart.h [PATCH] Add emergency_restart() 2005-07-26 14:35:41 -07:00
entry.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
errno.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fcntl.h [PATCH] Clean up struct flock64 definitions 2005-09-07 16:57:38 -07:00
flat.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fpga85e2c.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
futex.h [PATCH] consolidate asm/futex.h 2006-01-08 20:13:39 -08:00
gbus_int.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hardirq.h [PATCH] v850: use generic hardirq code 2005-11-15 08:59:20 -08:00
highres_timer.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hw_irq.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
io.h [PATCH] v850: Update ioremap return type and add ioread/iowrite functions 2005-07-27 16:26:03 -07:00
ioctl.h [PATCH] Generic ioctl.h 2006-01-10 08:01:34 -08:00
ioctls.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ipcbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kmap_types.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
linkage.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
local.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ma1.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ma.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
machdep.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
macrology.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
me2.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mman.h [PATCH] madvise MADV_DONTFORK/MADV_DOFORK 2006-02-14 16:09:34 -08:00
mmu_context.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmu.h [PATCH] v850: Update mmu.h header to match implementation changes 2005-07-11 10:22:39 -07:00
module.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
msgbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
page.h [PATCH] mm: consolidate get_order 2005-09-05 00:05:39 -07:00
param.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci.h [PATCH] v850: Update PCI support 2005-07-27 16:26:03 -07:00
percpu.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pgalloc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pgtable.h [PATCH] v850: Add pte_file 2005-07-27 16:26:03 -07:00
poll.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
posix_types.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
processor.h [PATCH] v850: task_stack_page(), task_pt_regs() 2006-01-12 09:08:54 -08:00
ptrace.h Fix "stuct", "strut", "struc" typos 2006-01-15 02:12:54 +01:00
resource.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rte_cb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rte_ma1_cb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rte_mb_a_pci.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rte_me2_cb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rte_nb85e_cb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
scatterlist.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sections.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
segment.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
semaphore.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
sembuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
serial.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
setup.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shmbuf.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
shmparam.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sigcontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
siginfo.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.h [PATCH] asm/signal.h unification 2005-05-04 07:33:15 -07:00
sim85e2.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sim85e2c.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sim85e2s.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sim.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
simsyscall.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
socket.h [NET]: Introduce SO_{SND,RCV}BUFFORCE socket options 2005-08-29 15:31:35 -07:00
sockios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
stat.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
statfs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
string.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
system.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
teg.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
termbits.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
termios.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
thread_info.h [PATCH] death of get_thread_info/put_thread_info 2006-01-12 09:08:59 -08:00
timex.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tlb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tlbflush.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
topology.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
types.h [PATCH] sab: consolidate kmem_bufctl_t 2005-09-05 00:05:48 -07:00
uaccess.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
ucontext.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unaligned.h [PATCH] include/asm-v850/ "extern inline" -> "static inline" 2005-11-07 07:53:32 -08:00
unistd.h [PATCH] remove gcc-2 checks 2006-01-08 20:14:02 -08:00
user.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e2_cache.h [PATCH] v850: Define L1_CACHE_SHIFT and L1_CACHE_SHIFT_MAX 2005-07-27 16:26:03 -07:00
v850e2.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_cache.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_intc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_timer_c.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_timer_d.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_uart.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_uarta.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_uartb.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e_utils.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
v850e.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00