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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
..
Kconfig	…
Makefile	…
bootmem.c	…
fadvise.c	…
filemap.c	[PATCH] mm: migration page refcounting fix	19 years ago
filemap.h	…
filemap_xip.c	…
fremap.c	…
highmem.c	…
hugetlb.c	[PATCH] compound page: use page[1].lru	19 years ago
internal.h	…
madvise.c	[PATCH] madvise MADV_DONTFORK/MADV_DOFORK	19 years ago
memory.c	[PATCH] Direct Migration V9: PageSwapCache checks	19 years ago
memory_hotplug.c	…
mempolicy.c	[PATCH] x86_64: Fix memory policy build without CONFIG_HUGETLBFS	19 years ago
mempool.c	…
mincore.c	…
mlock.c	[PATCH] move capable() to capability.h	19 years ago
mmap.c	[PATCH] move capable() to capability.h	19 years ago
mprotect.c	…
mremap.c	[PATCH] move capable() to capability.h	19 years ago
msync.c	…
nommu.c	…
oom_kill.c	[PATCH] dump_stack() in oom handler	19 years ago
page-writeback.c	[PATCH] mm: dirty_exceeded speedup	19 years ago
page_alloc.c	[PATCH] compound page: default destructor	19 years ago
page_io.c	…
pdflush.c	…
prio_tree.c	…
readahead.c	…
rmap.c	[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method	19 years ago
shmem.c	[PATCH] Direct Migration V9: PageSwapCache checks	19 years ago
slab.c	[PATCH] slab: Avoid deadlock at kmem_cache_create/kmem_cache_destroy	19 years ago
slob.c	[PATCH] SLOB=y && SMP=y fix	19 years ago
sparse.c	…
swap.c	[PATCH] compound page: use page[1].lru	19 years ago
swap_state.c	[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method	19 years ago
swapfile.c	[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes	19 years ago
thrash.c	…
tiny-shmem.c	[PATCH] do_truncate() call fix in tiny-shmem.c	19 years ago
truncate.c	…
util.c	…
vmalloc.c	…
vmscan.c	[PATCH] vmscan: skip reclaim_mapped determination if we do not swap	19 years ago