On Sat, Jun 25, 2016 at 01:03:13AM +0300, Guy Yur wrote: > libtdb.so.1`tdb_runtime_check_for_robust_mutexes + 1475 at mutex.c:957 > ... The pointer to tdb_runtime_check_for_robust_mutexes() appeared to be most useful, thanks. The two patches below should fix samba use of robustness. First, kernel erronously reset robust lists locations on fork. Second, the pthread_mutex_trylock() for owned errorcheck mutex must return EDEADLK and not EBUSY. Try that. diff --git a/lib/libthr/thread/thr_mutex.c b/lib/libthr/thread/thr_mutex.c index 5a99605..da71c70 100644 --- a/lib/libthr/thread/thr_mutex.c +++ b/lib/libthr/thread/thr_mutex.c _at__at_ -850,9 +871,12 _at__at_ mutex_self_trylock(struct pthread_mutex *m) switch (PMUTEX_TYPE(m->m_flags)) { case PTHREAD_MUTEX_ERRORCHECK: - case PTHREAD_MUTEX_NORMAL: case PTHREAD_MUTEX_ADAPTIVE_NP: - ret = EBUSY; + ret = EDEADLK; + break; + + case PTHREAD_MUTEX_NORMAL: + ret = EBUSY; break; case PTHREAD_MUTEX_RECURSIVE: diff --git a/sys/sys/proc.h b/sys/sys/proc.h index 6d03062..6162a16 100644 --- a/sys/sys/proc.h +++ b/sys/sys/proc.h _at__at_ -282,9 +282,6 _at__at_ struct thread { int td_no_sleeping; /* (k) Sleeping disabled count. */ int td_dom_rr_idx; /* (k) RR Numa domain selection. */ void *td_su; /* (k) FFS SU private */ - uintptr_t td_rb_list; /* (k) Robust list head. */ - uintptr_t td_rbp_list; /* (k) Robust priv list head. */ - uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ #define td_endzero td_sigmask /* Copied during fork1() or create_thread(). */ _at__at_ -298,6 +295,9 _at__at_ struct thread { u_char td_base_user_pri; /* (t) Base user pri */ u_int td_dbg_sc_code; /* (c) Syscall code to debugger. */ u_int td_dbg_sc_narg; /* (c) Syscall arg count to debugger.*/ + uintptr_t td_rb_list; /* (k) Robust list head. */ + uintptr_t td_rbp_list; /* (k) Robust priv list head. */ + uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ #define td_endcopy td_pcb /*Received on Sat Jun 25 2016 - 06:49:48 UTC
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