diff options
| author | Martijn Coenen <maco@android.com> | 2020-08-21 14:25:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 18:24:41 +0200 |
| commit | 261e7818f06ec51e488e007f787ccd7e77272918 (patch) | |
| tree | 16cdda4650d602e838f9024feaf20de70ba84ca1 /drivers/android/binder_alloc.h | |
| parent | 89320020d967e8f7affbc4488b85860b3a64c4c4 (diff) | |
binder: print warnings when detecting oneway spamming.
The most common cause of the binder transaction buffer filling up is a
client rapidly firing oneway transactions into a process, before it has
a chance to handle them. Yet the root cause of this is often hard to
debug, because either the system or the app will stop, and by that time
binder debug information we dump in bugreports is no longer relevant.
This change warns as soon as a process dips below 80% of its oneway
space (less than 100kB available in the configuration), when any one
process is responsible for either more than 50 transactions, or more
than 50% of the oneway space.
Signed-off-by: Martijn Coenen <maco@android.com>
Acked-by: Todd Kjos <tkjos@google.com>
Link: https://lore.kernel.org/r/20200821122544.1277051-1-maco@android.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/android/binder_alloc.h')
| -rw-r--r-- | drivers/android/binder_alloc.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/android/binder_alloc.h b/drivers/android/binder_alloc.h index db9c1b984695..55d8b4106766 100644 --- a/drivers/android/binder_alloc.h +++ b/drivers/android/binder_alloc.h @@ -32,6 +32,7 @@ struct binder_transaction; * @offsets_size: size of array of offsets * @extra_buffers_size: size of space for other objects (like sg lists) * @user_data: user pointer to base of buffer space + * @pid: pid to attribute the buffer to (caller) * * Bookkeeping structure for binder transaction buffers */ @@ -51,6 +52,7 @@ struct binder_buffer { size_t offsets_size; size_t extra_buffers_size; void __user *user_data; + int pid; }; /** @@ -117,7 +119,8 @@ extern struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc, size_t data_size, size_t offsets_size, size_t extra_buffers_size, - int is_async); + int is_async, + int pid); extern void binder_alloc_init(struct binder_alloc *alloc); extern int binder_alloc_shrinker_init(void); extern void binder_alloc_vma_close(struct binder_alloc *alloc); |