d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Missed this file for select SMP fixes associated with rev 1.93 of

Browse Source 
kern/sys_generic.c
This commit is contained in:
Alfred Perlstein 2002-03-14 05:16:18 +00:00
parent d16160657d
commit b0a3bfbdc6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=92261
1 changed files with 24 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
sys/netsmb/smb_trantcp.c
View File

@ -102,8 +102,7 @@ nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events,
struct thread *td)
{
struct timeval atv, rtv, ttv;
struct proc *p;
int timo, error;
int ncoll, timo, error;
if (tv) {
atv = *tv;
@ -115,57 +114,55 @@ nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events,
timevaladd(&atv, &rtv);
}
timo = 0;
p = td->td_proc;
PROC_LOCK(p);
mtx_lock(&sellock);
retry:
ncoll = nselcoll;
mtx_lock_spin(&sched_lock);
td->td_flags |= TDF_SELECT;
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
mtx_unlock(&sellock);
error = nb_poll(nbp, events, td);
PROC_LOCK(p);
mtx_lock(&sellock);
if (error) {
error = 0;
goto done;
}
if (tv) {
getmicrouptime(&rtv);
if (timevalcmp(&rtv, &atv, >=)) {
/*
* An event of our interest may occur during locking a process.
* In order to avoid missing the event that occurred during locking
* the process, test P_SELECT and rescan file descriptors if
* necessary.
*/
mtx_lock_spin(&sched_lock);
if ((td->td_flags & TDF_SELECT) == 0) {
td->td_flags |= TDF_SELECT;
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
error = nb_poll(nbp, events, td);
PROC_LOCK(p);
} else
mtx_unlock_spin(&sched_lock);
if (timevalcmp(&rtv, &atv, >=))
goto done;
}
ttv = atv;
timevalsub(&ttv, &rtv);
timo = tvtohz(&ttv);
}
/*
* An event of our interest may occur during locking a process.
* In order to avoid missing the event that occurred during locking
* the process, test P_SELECT and rescan file descriptors if
* necessary.
*/
mtx_lock_spin(&sched_lock);
td->td_flags &= ~TDF_SELECT;
if ((td->td_flags & TDF_SELECT) == 0 || nselcoll != ncoll) {
mtx_unlock_spin(&sched_lock);
goto retry;
}
mtx_unlock_spin(&sched_lock);
if (timo > 0)
error = cv_timedwait(&selwait, &p->p_mtx, timo);
error = cv_timedwait(&selwait, &sellock, timo);
else {
cv_wait(&selwait, &p->p_mtx);
cv_wait(&selwait, &sellock);
error = 0;
}
done:
clear_selinfo_list(td);
mtx_lock_spin(&sched_lock);
td->td_flags &= ~TDF_SELECT;
mtx_unlock_spin(&sched_lock);
PROC_UNLOCK(p);
mtx_unlock(&sellock);
done_noproclock:
if (error == ERESTART)