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Tweak the clearing of TDF_DEADLKTREAT so that we only bother grabbing the

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lock and clearing the flag if it was clear when uiomove() was called.
This commit is contained in:
John Baldwin 2003-05-05 21:27:29 +00:00
parent 854dc8c2a1
commit 01de25134f
1 changed files with 2 additions and 2 deletions
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4
sys/kern/kern_subr.c
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@ -185,9 +185,9 @@ uiomove(void *cp, int n, struct uio *uio)
n -= cnt;
}
out:
if (td) {
if (td && save == 0) {
mtx_lock_spin(&sched_lock);
td->td_flags = (td->td_flags & ~TDF_DEADLKTREAT) | save;
td->td_flags &= ~TDF_DEADLKTREAT;
mtx_unlock_spin(&sched_lock);
}
return (error);