Minchan Kim 3013bf62b6 binder: reduce mmap_sem write-side lock ...

binder has used write-side mmap_sem semaphore to release memory
mapped at address space of the process. However, right lock to
release pages is down_read, not down_write because page table lock
already protects the race for parallel freeing.

Please do not use mmap_sem write-side lock which is well known
contented lock.

Cc: Todd Kjos <tkjos@google.com>
Cc: Martijn Coenen <maco@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-02-19 14:50:11 +01:00

..

binder_alloc_selftest.c

binder: fix sparse issue in binder_alloc_selftest.c

2019-02-14 08:13:56 +01:00

binder_alloc.c

binder: reduce mmap_sem write-side lock

2019-02-19 14:50:11 +01:00

binder_alloc.h

binder: use userspace pointer as base of buffer space

2019-02-12 10:43:57 +01:00

binder_internal.h

binderfs: remove separate device_initcall()

2019-02-01 15:50:26 +01:00

binder_trace.h

binder: use userspace pointer as base of buffer space

2019-02-12 10:43:57 +01:00

binder.c

binder: fix handling of misaligned binder object

2019-02-15 08:49:20 +01:00

binderfs.c

binderfs: remove separate device_initcall()

2019-02-01 15:50:26 +01:00

Kconfig

binder: add functions to copy to/from binder buffers

2019-02-12 10:43:57 +01:00

Makefile

binder: implement binderfs

2018-12-19 09:40:13 +01:00