ashmem for 2.6.27.
authorRobert Love <rlove@google.com>
Tue, 14 Oct 2008 14:00:47 +0000 (10:00 -0400)
committerDan Willemsen <dwillemsen@nvidia.com>
Thu, 1 Dec 2011 05:37:55 +0000 (21:37 -0800)
commit048175172abd7f55280b934fdf68ad8c06dc6ce9
tree884951c12d526300332377a098bcbb36e6281fe9
parentab79fc41e994aff30ad623e5af3cd5f6b0d10402
ashmem for 2.6.27.

Forward port of ashmem to 2.6.27.

Signed-off-by: Robert Love <rlove@google.com>

ashmem: Don't install fault handler for private mmaps.

Ashmem is used to create named private heaps. If this heap is backed
by a tmpfs file it will allocate two pages for every page touched.
In 2.6.27, the extra page would later be freed, but 2.6.29 does not
scan anonymous pages when running without swap so the memory is not
freed while the file is referenced. This change changes the behavior
of private ashmem mmaps to match /dev/zero instead tmpfs.

Signed-off-by: Arve Hjønnevåg <arve@android.com>

ashmem: Add common prefix to name reported in /proc/pid/maps

Signed-off-by: Arve Hjønnevåg <arve@android.com>

ashmem: don't require a page aligned size

This makes ashmem more similar to shmem and mmap, by
not requiring the specified size to be page aligned,
instead rounding it internally as needed.

Signed-off-by: Marco Nelissen <marcone@android.com>
include/linux/ashmem.h [new file with mode: 0644]
include/linux/mm.h
init/Kconfig
mm/Makefile
mm/ashmem.c [new file with mode: 0644]
mm/shmem.c