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| author | julian <julian@FreeBSD.org> | 2002-10-25 07:11:12 +0000 |
|---|---|---|
| committer | julian <julian@FreeBSD.org> | 2002-10-25 07:11:12 +0000 |
| commit | 4ea837f673e35a1bd44b7a3a83d08c96d42e1b81 (patch) | |
| tree | 45eb9c5b87d56720d1194f404349dd8746e61573 /sys/kern/kern_synch.c | |
| parent | 59e43a0396de61b22eadda85d6d3d4586710c0b9 (diff) | |
| download | FreeBSD-src-4ea837f673e35a1bd44b7a3a83d08c96d42e1b81.zip FreeBSD-src-4ea837f673e35a1bd44b7a3a83d08c96d42e1b81.tar.gz | |
More work on the interaction between suspending and sleeping threads.
Also clean up some code used with 'single-threading'.
Reviewed by: davidxu
Diffstat (limited to 'sys/kern/kern_synch.c')
| -rw-r--r-- | sys/kern/kern_synch.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c index b758c96..abbd7b5 100644 --- a/sys/kern/kern_synch.c +++ b/sys/kern/kern_synch.c @@ -155,26 +155,29 @@ msleep(ident, mtx, priority, wmesg, timo) * Hence the TDF_INMSLEEP flag. */ if (p->p_flag & P_KSES) { - /* Just don't bother if we are exiting - and not the exiting thread. */ - if ((p->p_flag & P_WEXIT) && catch && p->p_singlethread != td) + /* + * Just don't bother if we are exiting + * and not the exiting thread. + */ + if ((p->p_flag & P_WEXIT) && catch && (p->p_singlethread != td)) return (EINTR); - if (td->td_mailbox && (!(td->td_flags & TDF_INMSLEEP))) { + mtx_lock_spin(&sched_lock); + if ((td->td_flags & (TDF_UNBOUND|TDF_INMSLEEP)) == + TDF_UNBOUND) { /* * Arrange for an upcall to be readied. * it will not actually happen until all * pending in-kernel work for this KSEGRP * has been done. */ - mtx_lock_spin(&sched_lock); /* Don't recurse here! */ td->td_flags |= TDF_INMSLEEP; thread_schedule_upcall(td, td->td_kse); td->td_flags &= ~TDF_INMSLEEP; - mtx_unlock_spin(&sched_lock); } + } else { + mtx_lock_spin(&sched_lock); } - mtx_lock_spin(&sched_lock); if (cold ) { /* * During autoconfiguration, just give interrupts |
