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vndthread: play with b_vp and v_numoutput as it used to do, 

for "strange" filesystems like nfs.  PR/32671 from Simon Burge.

although i'm not really happy with this "fix", i think that the code will
be replaced with direct i/o anyway, sooner or later...
This commit is contained in:
yamt 2006-02-04 11:52:32 +00:00
parent d85485aca1
commit 6e6449891d
1 changed files with 9 additions and 4 deletions
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13
sys/dev/vnd.c
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@ -1,4 +1,4 @@
/* $NetBSD: vnd.c,v 1.137 2006/02/04 11:19:59 yamt Exp $ */
/* $NetBSD: vnd.c,v 1.138 2006/02/04 11:52:32 yamt Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -133,7 +133,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.137 2006/02/04 11:19:59 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.138 2006/02/04 11:52:32 yamt Exp $");
#if defined(_KERNEL_OPT)
#include "fs_nfs.h"
@ -584,7 +584,7 @@ vndthread(void *arg)
bp->b_flags = (obp->b_flags & B_READ) | B_CALL;
bp->b_iodone = vndiodone;
bp->b_private = obp;
bp->b_vp = NULL;
bp->b_vp = vnd->sc_vp;
bp->b_data = obp->b_data;
bp->b_bcount = bp->b_resid = obp->b_bcount;
BIO_COPYPRIO(bp, obp);
@ -596,8 +596,13 @@ vndthread(void *arg)
vnd->sc_active++;
splx(s);
if ((flags & B_READ) == 0)
if ((flags & B_READ) == 0) {
s = splbio();
V_INCR_NUMOUTPUT(bp->b_vp);
splx(s);
vn_start_write(vnd->sc_vp, &mp, V_WAIT);
}
/* Instrumentation. */
disk_busy(&vnd->sc_dkdev);