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Block all signals while sleeping; this prevents 100% cpu usage

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when a process waiting for an afs operation to complete receives
a signal.
This commit is contained in:
Nickolai Zeldovich 2002-01-29 17:36:20 +00:00
parent 905b71014b
commit 41fb11e6b2
1 changed files with 13 additions and 0 deletions
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13
src/afs/LINUX/osi_sleep.c
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@ -223,9 +223,22 @@ void afs_osi_Sleep(char *event)
seq = evp->seq;
while (seq == evp->seq) {
sigset_t saved_set;
AFS_ASSERT_GLOCK();
AFS_GUNLOCK();
spin_lock_irq(&current->sigmask_lock);
saved_set = current->blocked;
sigfillset(&current->blocked);
recalc_sigpending(current);
spin_unlock_irq(&current->sigmask_lock);
interruptible_sleep_on(&evp->cond);
spin_lock_irq(&current->sigmask_lock);
current->blocked = saved_set;
recalc_sigpending(current);
spin_unlock_irq(&current->sigmask_lock);
AFS_GLOCK();
}
relevent(evp);