swapcluster_flush: handle nused==0, which can happen if swapcluster_add failed.
PR/37669 from Andrew Doran.
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@ -1,4 +1,4 @@
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/* $NetBSD: uvm_pdaemon.c,v 1.90 2008/01/28 12:22:47 yamt Exp $ */
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/* $NetBSD: uvm_pdaemon.c,v 1.91 2008/02/07 12:24:16 yamt Exp $ */
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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@ -71,7 +71,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.90 2008/01/28 12:22:47 yamt Exp $");
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__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.91 2008/02/07 12:24:16 yamt Exp $");
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#include "opt_uvmhist.h"
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#include "opt_readahead.h"
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@ -533,10 +533,12 @@ swapcluster_flush(struct swapcluster *swc, bool now)
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* now start the pageout.
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*/
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uvmexp.pdpageouts++;
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uvm_pageout_start(nused);
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error = uvm_swap_put(slot, swc->swc_pages, nused, 0);
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KASSERT(error == 0);
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if (nused > 0) {
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uvmexp.pdpageouts++;
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uvm_pageout_start(nused);
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error = uvm_swap_put(slot, swc->swc_pages, nused, 0);
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KASSERT(error == 0);
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}
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/*
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* zero swslot to indicate that we are
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