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only acquire the lock for swpgonly if we actually need to adjust it.

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chs 2001-11-07 08:43:32 +00:00
parent e056338509
commit ac48df1681
1 changed files with 7 additions and 5 deletions
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12
sys/uvm/uvm_km.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_km.c,v 1.53 2001/11/06 08:07:50 chs Exp $ */
/* $NetBSD: uvm_km.c,v 1.54 2001/11/07 08:43:32 chs Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -308,10 +308,12 @@ uvm_km_pgremove(uobj, start, end)
}
simple_unlock(&uobj->vmobjlock);
simple_lock(&uvm.swap_data_lock);
KASSERT(uvmexp.swpgonly >= swpgonlydelta);
uvmexp.swpgonly -= swpgonlydelta;
simple_unlock(&uvm.swap_data_lock);
if (swpgonlydelta > 0) {
simple_lock(&uvm.swap_data_lock);
KASSERT(uvmexp.swpgonly >= swpgonlydelta);
uvmexp.swpgonly -= swpgonlydelta;
simple_unlock(&uvm.swap_data_lock);
}
}