allocbuf: yield cpu in a loop.
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parent
b88fc0e1b7
commit
926005485e
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@ -1,4 +1,4 @@
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/* $NetBSD: vfs_bio.c,v 1.153 2006/01/15 08:27:07 yamt Exp $ */
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/* $NetBSD: vfs_bio.c,v 1.154 2006/01/15 09:01:02 yamt Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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@ -81,7 +81,7 @@
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#include "opt_softdep.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.153 2006/01/15 08:27:07 yamt Exp $");
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__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.154 2006/01/15 09:01:02 yamt Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -1166,6 +1166,15 @@ allocbuf(struct buf *bp, int size, int preserve)
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* Need to trim overall memory usage.
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*/
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while (buf_canrelease()) {
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if (curcpu()->ci_schedstate.spc_flags &
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SPCF_SHOULDYIELD) {
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simple_unlock(&bqueue_slock);
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splx(s);
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preempt(1);
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s = splbio();
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simple_lock(&bqueue_slock);
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}
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if (buf_trim() == 0)
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break;
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}
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