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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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sn	[IA64-SGI] Shub2 BTE address fix	19 years ago
a.out.h	…
acpi-ext.h	…
acpi.h	[IA64] Add ACPI based P-state support	20 years ago
agp.h	…
asmmacro.h	…
atomic.h	[PATCH] mutex subsystem, add atomic_xchg() to all arches	19 years ago
auxvec.h	[PATCH] auxiliary vector cleanups	20 years ago
bitops.h	[FLS64]: generic version	19 years ago
break.h	…
bug.h	[PATCH] remove gcc-2 checks	19 years ago
bugs.h	…
byteorder.h	…
cache.h	[PATCH] Kill L1_CACHE_SHIFT_MAX	19 years ago
cacheflush.h	…
checksum.h	…
compat.h	[PATCH] ia64: task_pt_regs()	19 years ago
cpu.h	…
cputime.h	…
current.h	…
cyclone.h	…
delay.h	[IA64] disable preemption in udelay()	19 years ago
div64.h	…
dma-mapping.h	[PATCH] ia64: re-implement dma_get_cache_alignment to avoid EXPORT_SYMBOL	19 years ago
dma.h	…
elf.h	[PATCH] auxiliary vector cleanups	20 years ago
emergency-restart.h	…
errno.h	…
fcntl.h	[PATCH] Clean up struct flock definitions	20 years ago
fpswa.h	…
fpu.h	…
futex.h	[PATCH] consolidate asm/futex.h	19 years ago
gcc_intrin.h	…
hardirq.h	…
hw_irq.h	[PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity	20 years ago
ia32.h	[IA64] Change SET_PERSONALITY to comply with comment in binfmt_elf.c.	19 years ago
ia64regs.h	…
ide.h	[PATCH] ia64: drop arch-specific IDE MAX_HWIFS definition	19 years ago
intel_intrin.h	…
intrinsics.h	…
io.h	[PATCH] /dev/mem: validate mmap requests	19 years ago
ioctl.h	[PATCH] Generic ioctl.h	19 years ago
ioctls.h	…
iosapic.h	[IA64] Minor cleanups - remove unnecessary function prototype in iosapic.h	20 years ago
ipcbuf.h	…
irq.h	[IA64] Manual merge fix for 3 files	20 years ago
kdebug.h	[IA64] Extend notify_die() hooks for IA64	19 years ago
kmap_types.h	…
kprobes.h	[IA64] prevent accidental modification of args in jprobe handler	19 years ago
kregs.h	…
linkage.h	…
local.h	[IA64] Fix missing parameter for local_add/sub	19 years ago
machvec.h	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6	19 years ago
machvec_dig.h	…
machvec_hpsim.h	…
machvec_hpzx1.h	[IA64] more robust zx1/sx1000 machvec support	20 years ago
machvec_hpzx1_swiotlb.h	[IA64] more robust zx1/sx1000 machvec support	20 years ago
machvec_init.h	…
machvec_sn2.h	…
mc146818rtc.h	…
mca.h	[IA64] Wire in the MCA/INIT handler stacks	20 years ago
mca_asm.h	[PATCH] MCA/INIT: use per cpu stacks	20 years ago
meminit.h	Pull sparsemem-v5 into release branch	19 years ago
mman.h	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	19 years ago
mmu.h	…
mmu_context.h	[IA64] make mmu_context.h and tlb.c 80-column friendly	19 years ago
mmzone.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	20 years ago
module.h	…
msgbuf.h	…
msi.h	[PATCH] PCI: Change MSI to use physical delivery mode always	19 years ago
mutex.h	[PATCH] mutex subsystem, add default include/asm-*/mutex.h files	19 years ago
namei.h	…
nodedata.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	20 years ago
numa.h	…
numnodes.h	…
page.h	[IA64] - Make pfn_valid more precise for SGI Altix systems	19 years ago
pal.h	[IA64] pal cache flush patch	19 years ago
param.h	…
parport.h	…
patch.h	…
pci.h	[PATCH] Make sparc64 use setup-res.c	20 years ago
percpu.h	…
perfmon.h	…
perfmon_default_smpl.h	…
pgalloc.h	[IA64] 4-level page tables	19 years ago
pgtable.h	[IA64] 4-level page tables	19 years ago
poll.h	…
posix_types.h	…
processor.h	[IA64] avoid broken SAL_CACHE_FLUSH implementations	19 years ago
ptrace.h	[PATCH] ia64: task_pt_regs()	19 years ago
ptrace_offsets.h	…
resource.h	…
rse.h	…
rwsem.h	[PATCH] add sem_is_read/write_locked()	19 years ago
sal.h	[IA64] avoid broken SAL_CACHE_FLUSH implementations	19 years ago
scatterlist.h	…
sections.h	…
segment.h	…
semaphore.h	[IA64] Fix bug in ia64 specific down() function	19 years ago
sembuf.h	…
serial.h	…
setup.h	…
shmbuf.h	…
shmparam.h	…
sigcontext.h	…
siginfo.h	…
signal.h	…
smp.h	…
socket.h	[NET]: Introduce SO_{SND,RCV}BUFFORCE socket options	20 years ago
sockios.h	…
sparsemem.h	[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM	20 years ago
spinlock.h	[PATCH] remove gcc-2 checks	19 years ago
spinlock_types.h	[PATCH] spinlock consolidation	20 years ago
stat.h	…
statfs.h	…
string.h	…
suspend.h	…
system.h	[IA64] remove staled comments in asm/system.h	19 years ago
termbits.h	…
termios.h	…
thread_info.h	[IA64] Handle debug traps in fsys mode	19 years ago
timex.h	…
tlb.h	[PATCH] mm: tlb_finish_mmu forget rss	19 years ago
tlbflush.h	[IA64] Use bitmaps for efficient context allocation/free	19 years ago
topology.h	[PATCH] Export cpu topology in sysfs	19 years ago
types.h	[PATCH] sab: consolidate kmem_bufctl_t	20 years ago
uaccess.h	[PATCH] ia64 basic __user annotations	20 years ago
ucontext.h	…
unaligned.h	…
uncached.h	…
unistd.h	[IA64] unshare system call registration for ia64	19 years ago
unwind.h	[IA64] MCA/INIT: remove obsolete unwind code	20 years ago
user.h	…
ustack.h	…
vga.h	…
xor.h	…