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uvm_pageout_done(): do nothing when npages is zero.

This commit is contained in:
ad 2020-05-25 19:46:20 +00:00
parent 704e68575e
commit 3d8601a9ec
1 changed files with 8 additions and 3 deletions
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11
sys/uvm/uvm_pdaemon.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_pdaemon.c,v 1.126 2020/04/13 15:54:45 maxv Exp $ */
/* $NetBSD: uvm_pdaemon.c,v 1.127 2020/05/25 19:46:20 ad Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.126 2020/04/13 15:54:45 maxv Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.127 2020/05/25 19:46:20 ad Exp $");
#include "opt_uvmhist.h"
#include "opt_readahead.h"
@ -355,7 +355,12 @@ void
uvm_pageout_done(int npages)
{
KASSERT(uvmexp.paging >= npages);
KASSERT(atomic_load_relaxed(&uvmexp.paging) >= npages);
if (npages == 0) {
return;
}
atomic_add_int(&uvmexp.paging, -npages);
/*