diff options
| author | jeff <jeff@FreeBSD.org> | 2008-03-21 08:23:25 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2008-03-21 08:23:25 +0000 |
| commit | ba540b27d633327453067e692e5ccb2095d417c1 (patch) | |
| tree | 85009349e539f1265173b5d33889d0fca5031c61 /sys/kern/kern_thread.c | |
| parent | 8420f5505a178be36939d61d6e9da31e0f2eb05a (diff) | |
| download | FreeBSD-src-ba540b27d633327453067e692e5ccb2095d417c1.zip FreeBSD-src-ba540b27d633327453067e692e5ccb2095d417c1.tar.gz | |
- Add a new td flag TDF_NEEDSUSPCHK that is set whenever a thread needs
to enter thread_suspend_check().
- Set TDF_ASTPENDING along with TDF_NEEDSUSPCHK so we can move the
thread_suspend_check() to ast() rather than userret().
- Check TDF_NEEDSUSPCHK in the sleepq_catch_signals() optimization so
that we don't miss a suspend request. If this is set use the
expensive signal path.
- Set NEEDSUSPCHK when creating a new thread in thr in case the
creating thread is due to be suspended as well but has not yet.
Reviewed by: davidxu (Authored original patch)
Diffstat (limited to 'sys/kern/kern_thread.c')
| -rw-r--r-- | sys/kern/kern_thread.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/kern_thread.c b/sys/kern/kern_thread.c index 65fdae4..8745e5e 100644 --- a/sys/kern/kern_thread.c +++ b/sys/kern/kern_thread.c @@ -549,7 +549,7 @@ thread_single(int mode) if (td2 == td) continue; thread_lock(td2); - td2->td_flags |= TDF_ASTPENDING; + td2->td_flags |= TDF_ASTPENDING | TDF_NEEDSUSPCHK; if (TD_IS_INHIBITED(td2)) { switch (mode) { case SINGLE_EXIT: @@ -751,6 +751,7 @@ thread_suspend_switch(struct thread *td) p->p_suspcount++; PROC_UNLOCK(p); thread_lock(td); + td->td_flags &= ~TDF_NEEDSUSPCHK; TD_SET_SUSPENDED(td); sched_sleep(td, 0); PROC_SUNLOCK(p); @@ -771,6 +772,7 @@ thread_suspend_one(struct thread *td) THREAD_LOCK_ASSERT(td, MA_OWNED); KASSERT(!TD_IS_SUSPENDED(td), ("already suspended")); p->p_suspcount++; + td->td_flags &= ~TDF_NEEDSUSPCHK; TD_SET_SUSPENDED(td); sched_sleep(td, 0); } |
