mirror of https://gitee.com/openkylin/linux.git
3013bf62b6
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> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| binder.c | ||
| binder_alloc.c | ||
| binder_alloc.h | ||
| binder_alloc_selftest.c | ||
| binder_internal.h | ||
| binder_trace.h | ||
| binderfs.c | ||