diff options
| author |   visa <visa@openbsd.org> | 2020-01-21 15:20:47 +0000 |
|---|---|---|
| committer | visa <visa@openbsd.org> | 2020-01-21 15:20:47 +0000 |
| commit | 1021dd3d027b31effd3975d80598b0ea0412dae3 (patch) | |
| tree | 4f1272143ceda9114f2e6c29c22139f7b92b28f7 /sys/kern/kern_fork.c | |
| parent | No need to pass peerid to lsa_snap() (diff) | |
| download | wireguard-openbsd-1021dd3d027b31effd3975d80598b0ea0412dae3.tar.xz wireguard-openbsd-1021dd3d027b31effd3975d80598b0ea0412dae3.zip | |
Make __thrsleep(2) and __thrwakeup(2) MP-safe
Threads in __thrsleep(2) are tracked using queues, one queue per each
process for synchronization between threads of a process, and one
system-wide queue for the special ident -1 handling. Each of these
queues has an associated rwlock that serializes access.
The queue lock is released when calling copyin() and copyout() in
thrsleep(). This preserves the existing behaviour where a blocked copy
operation does not prevent other threads from making progress.
Tested by anton@, claudio@
OK anton@, claudio@, tedu@, mpi@
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index a9eebaaa35c..1f74865ed6a 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_fork.c,v 1.220 2020/01/06 10:25:10 visa Exp $ */ +/* $OpenBSD: kern_fork.c,v 1.221 2020/01/21 15:20:47 visa Exp $ */ /* $NetBSD: kern_fork.c,v 1.29 1996/02/09 18:59:34 christos Exp $ */ /* @@ -191,7 +191,9 @@ process_initialize(struct process *pr, struct proc *p) LIST_INIT(&pr->ps_children); LIST_INIT(&pr->ps_ftlist); LIST_INIT(&pr->ps_sigiolst); + TAILQ_INIT(&pr->ps_tslpqueue); + rw_init(&pr->ps_lock, "pslock"); mtx_init(&pr->ps_mtx, IPL_MPFLOOR); timeout_set(&pr->ps_realit_to, realitexpire, pr); |