linux/drivers/android
Martijn Coenen 261e7818f0 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>
2020-09-03 18:24:41 +02:00
..
binder_alloc_selftest.c binder: print warnings when detecting oneway spamming. 2020-09-03 18:24:41 +02:00
binder_alloc.c binder: print warnings when detecting oneway spamming. 2020-09-03 18:24:41 +02:00
binder_alloc.h binder: print warnings when detecting oneway spamming. 2020-09-03 18:24:41 +02:00
binder_internal.h binder: prevent UAF for binderfs devices II 2020-03-03 19:58:37 +01:00
binder_trace.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
binder.c binder: print warnings when detecting oneway spamming. 2020-09-03 18:24:41 +02:00
binderfs.c binderfs: make symbol 'binderfs_fs_parameters' static 2020-09-03 18:24:39 +02:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00