kevin/linux
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linux/include/asm-xtensa
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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
..
platform-iss [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8 2005-06-24 00:05:22 -07:00
xtensa [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 7 2005-06-24 00:05:22 -07:00
a.out.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -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 [FLS64]: generic version 2006-01-03 13:11:06 -08:00
bootparam.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
bug.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
bugs.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
byteorder.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
cache.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
cacheflush.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
checksum.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
coprocessor.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
cpumask.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
cputime.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
current.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
delay.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
div64.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
dma-mapping.h [PATCH] gfp_t: dma-mapping (xtensa) 2005-10-28 08:16:49 -07:00
dma.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
elf.h [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
emergency-restart.h [PATCH] Add emergency_restart() 2005-07-26 14:35:41 -07:00
errno.h [PATCH] xtensa: cleanups for errno and ipc. 2005-06-30 08:45:10 -07:00
fcntl.h [PATCH] Clean up struct flock64 definitions 2005-09-07 16:57:38 -07:00
fixmap.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
futex.h [PATCH] xtensa: add asm/futex.h 2006-02-01 08:53:23 -08:00
hardirq.h [PATCH] xtensa: remove io_remap_page_range and minor clean-ups 2005-09-22 22:17:37 -07:00
highmem.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
hw_irq.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
ide.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
io.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
ioctl.h [PATCH] Generic ioctl.h 2006-01-10 08:01:34 -08:00
ioctls.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
ipcbuf.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
irq.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
kmap_types.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
linkage.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
local.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
mman.h [PATCH] madvise MADV_DONTFORK/MADV_DOFORK 2006-02-14 16:09:34 -08:00
mmu_context.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
mmu.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
module.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
msgbuf.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
page.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
param.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
pci-bridge.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
pci.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
percpu.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
pgalloc.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
pgtable.h [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
platform.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8 2005-06-24 00:05:22 -07:00
poll.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
posix_types.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
processor.h [PATCH] xtensa: task_pt_regs(), task_stack_page() 2006-01-12 09:08:54 -08:00
ptrace.h [PATCH] xtensa: task_pt_regs(), task_stack_page() 2006-01-12 09:08:54 -08:00
resource.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
rmap.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
rwsem.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
scatterlist.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
sections.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
segment.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
semaphore.h [PATCH] xtensa: struct semaphore.sleepers initialization 2005-11-07 07:53:32 -08:00
sembuf.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
serial.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
setup.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
shmbuf.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
shmparam.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
sigcontext.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
siginfo.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
signal.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
smp.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
socket.h [NET]: Introduce SO_{SND,RCV}BUFFORCE socket options 2005-08-29 15:31:35 -07:00
sockios.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
spinlock.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
stat.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
statfs.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
string.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
system.h [PATCH] xtensa: remove io_remap_page_range and minor clean-ups 2005-09-22 22:17:37 -07:00
termbits.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
termios.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
thread_info.h [PATCH] death of get_thread_info/put_thread_info 2006-01-12 09:08:59 -08:00
timex.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
tlb.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
tlbflush.h [PATCH] xtensa: replace 'extern inline' with 'static inline' 2005-09-05 00:06:25 -07:00
topology.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
types.h [PATCH] sab: consolidate kmem_bufctl_t 2005-09-05 00:05:48 -07:00
uaccess.h kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h support 2005-09-09 20:57:26 +02:00
ucontext.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
unaligned.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
unistd.h [PATCH] xtensa: remove old syscalls 2005-07-07 18:23:44 -07:00
user.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
vga.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00
xor.h [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6 2005-06-24 00:05:22 -07:00