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Jason Baron accb61fe7b coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP 
Since we no longer need the VM_ALWAYSDUMP flag, let's use the freed bit
for 'VM_NODUMP' flag.  The idea is is to add a new madvise() flag:
MADV_DONTDUMP, which can be set by applications to specifically request
memory regions which should not dump core.

The specific application I have in mind is qemu: we can add a flag there
that wouldn't dump all of guest memory when qemu dumps core.  This flag
might also be useful for security sensitive apps that want to absolutely
make sure that parts of memory are not dumped.  To clear the flag use:
MADV_DODUMP.

[akpm@linux-foundation.org: s/MADV_NODUMP/MADV_DONTDUMP/, s/MADV_CLEAR_NODUMP/MADV_DODUMP/, per Roland]
[akpm@linux-foundation.org: fix up the architectures which broke]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:42 -07:00
..
alpha coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP 2012-03-23 16:58:42 -07:00
arm coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
avr32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
blackfin nmi watchdog: do not use cpp symbol in Kconfig 2012-03-23 16:58:31 -07:00
c6x Remove remaining bits of io_remap_page_range() 2012-03-23 16:58:31 -07:00
cris Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
frv Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
h8300 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
hexagon coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
ia64 Features: 2012-03-22 20:16:14 -07:00
m32r Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-03-22 20:20:18 -07:00
microblaze Remove remaining bits of io_remap_page_range() 2012-03-23 16:58:31 -07:00
mips coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP 2012-03-23 16:58:42 -07:00
mn10300 nmi watchdog: do not use cpp symbol in Kconfig 2012-03-23 16:58:31 -07:00
openrisc Remove remaining bits of io_remap_page_range() 2012-03-23 16:58:31 -07:00
parisc coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP 2012-03-23 16:58:42 -07:00
powerpc coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
s390 coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
score Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
sh coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
sparc nmi watchdog: do not use cpp symbol in Kconfig 2012-03-23 16:58:31 -07:00
tile coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
um um: use set_current_blocked() and block_sigmask() 2012-03-23 16:58:31 -07:00
unicore32 coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
x86 coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
xtensa coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP 2012-03-23 16:58:42 -07:00
.gitignore
Kconfig nmi watchdog: do not use cpp symbol in Kconfig 2012-03-23 16:58:31 -07:00