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Temporarily back out r1.74 as it seems to cause a number of regressions

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accordimg to numerous reports. It  might get reintroduced some time later
when an exact failure mode is understood better.
This commit is contained in:
Alexander Kabaev 2004-08-23 02:39:45 +00:00
parent c480dc188f
commit cffdaf2dce
1 changed files with 5 additions and 12 deletions
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17
sys/kern/kern_lock.c
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@ -335,12 +335,8 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
error = acquire(&lkp, extflags, LK_SHARE_NONZERO);
lkp->lk_flags &= ~LK_WANT_UPGRADE;
if (error) {
if ((lkp->lk_flags & ( LK_WANT_EXCL | LK_WAIT_NONZERO)) == (LK_WANT_EXCL | LK_WAIT_NONZERO))
wakeup((void *)lkp);
break;
}
if (error)
break;
lkp->lk_flags |= LK_HAVE_EXCL;
lkp->lk_lockholder = thr;
if (lkp->lk_exclusivecount != 0)
@ -386,20 +382,17 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
/*
* Try to acquire the want_exclusive flag.
*/
error = acquire(&lkp, extflags, LK_WANT_EXCL);
error = acquire(&lkp, extflags, (LK_HAVE_EXCL | LK_WANT_EXCL));
if (error)
break;
lkp->lk_flags |= LK_WANT_EXCL;
/*
* Wait for shared locks and upgrades to finish.
*/
error = acquire(&lkp, extflags, LK_HAVE_EXCL | LK_WANT_UPGRADE | LK_SHARE_NONZERO);
error = acquire(&lkp, extflags, LK_WANT_UPGRADE | LK_SHARE_NONZERO);
lkp->lk_flags &= ~LK_WANT_EXCL;
if (error) {
if (lkp->lk_flags & LK_WAIT_NONZERO)
wakeup((void *)lkp);
if (error)
break;
}
lkp->lk_flags |= LK_HAVE_EXCL;
lkp->lk_lockholder = thr;
if (lkp->lk_exclusivecount != 0)