| commit | 77142517990fd3d982678c2945ea2c4188ec5f9a | |
| author | Konstantin Khlebnikov <koct9i@gmail.com> | |
| Wed, 6 Aug 2014 23:06:34 +0000 (6 16:06 -0700) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Thu, 7 Aug 2014 01:01:19 +0000 (6 18:01 -0700) | ||
| tree | 9ad927b6f48ad2e6a89830ae4f3ee3fa99976646 | treesnapshot (tar.gz zip) |
| parent | 66ee4b8887ec5ce04bae3e840d206db7b7ad34d1 | commitdiff |
shmem: update memory reservation on truncate
A shared anonymous mapping created without MAP_NORESERVE holds memory
reservation for whole range of shmem segment. Usually there is no way
to change its size, but /proc/<pid>/map_files/... (available if
CONFIG_CHECKPOINT_RESTORE=y) allows that.
This patch adjusts the memory reservation in shmem_setattr().
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A shared anonymous mapping created without MAP_NORESERVE holds memory
reservation for whole range of shmem segment. Usually there is no way
to change its size, but /proc/<pid>/map_files/... (available if
CONFIG_CHECKPOINT_RESTORE=y) allows that.
This patch adjusts the memory reservation in shmem_setattr().
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| mm/shmem.c | diffblobblamehistory |