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comments in nfs_doio_write.

This commit is contained in:
yamt 2004-01-10 14:52:53 +00:00
parent a3b2d1879c
commit 5abccc6a0c
1 changed files with 15 additions and 3 deletions
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18
sys/nfs/nfs_bio.c
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@ -1,4 +1,4 @@
/* $NetBSD: nfs_bio.c,v 1.114 2003/12/07 21:15:46 fvdl Exp $ */
/* $NetBSD: nfs_bio.c,v 1.115 2004/01/10 14:52:53 yamt Exp $ */
/*
* Copyright (c) 1989, 1993
@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_bio.c,v 1.114 2003/12/07 21:15:46 fvdl Exp $");
__KERNEL_RCSID(0, "$NetBSD: nfs_bio.c,v 1.115 2004/01/10 14:52:53 yamt Exp $");
#include "opt_nfs.h"
#include "opt_ddb.h"
@ -967,7 +967,7 @@ nfs_doio_write(bp, uiop)
boolean_t stalewriteverf = FALSE;
int i, npages = (bp->b_bcount + PAGE_SIZE - 1) >> PAGE_SHIFT;
struct vm_page *pgs[npages];
boolean_t needcommit = TRUE;
boolean_t needcommit = TRUE; /* need only COMMIT RPC */
boolean_t pageprotected;
struct uvm_object *uobj = &vp->v_uobj;
int error;
@ -991,8 +991,20 @@ again:
* this page belongs to our object.
*/
simple_lock(&uobj->vmobjlock);
/*
* write out the page stably if it's about to
* be released because we can't resend it
* on the server crash.
*
* XXX assuming PG_RELEASE|PG_PAGEOUT won't be
* changed until unbusy the page.
*/
if (pgs[i]->flags & (PG_RELEASED|PG_PAGEOUT))
iomode = NFSV3WRITE_FILESYNC;
/*
* if we met a page which hasn't been sent yet,
* we need do WRITE RPC.
*/
if ((pgs[i]->flags & PG_NEEDCOMMIT) == 0)
needcommit = FALSE;
simple_unlock(&uobj->vmobjlock);