diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2019-07-11 20:59:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-31 07:27:09 +0200 |
| commit | af0883f9dcf6603ca8d1a59d4baf930b7f90eeae (patch) | |
| tree | bfc6de500cc11e8ebede8c7acea43912f76cb132 /kernel/locking | |
| parent | 0d72bb853afc1076201ec705ce15662bddaf96af (diff) | |
proc: use down_read_killable mmap_sem for /proc/pid/maps
[ Upstream commit 8a713e7df3352b8d9392476e9cf29e4e185dac32 ]
Do not remain stuck forever if something goes wrong. Using a killable
lock permits cleanup of stuck tasks and simplifies investigation.
This function is also used for /proc/pid/smaps.
Link: http://lkml.kernel.org/r/156007493160.3335.14447544314127417266.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/locking')
0 files changed, 0 insertions, 0 deletions