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Actually, we do need separate "no references in file server" and 

"noref + inactive" flags if we wish to correctly support unix open
file semantics and optimize away pre-reclaim cache flushes.  So,
add PNODE_DYING which stands for norefs + inactive.
This commit is contained in:
pooka 2007-05-19 16:35:01 +00:00
parent a924864766
commit 121b6fb7b3
1 changed files with 8 additions and 6 deletions
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14
sys/fs/puffs/puffs_vnops.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: puffs_vnops.c,v 1.71 2007/05/18 15:46:09 pooka Exp $ */
/* $NetBSD: puffs_vnops.c,v 1.72 2007/05/19 16:35:01 pooka Exp $ */
/*
* Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved.
@ -33,7 +33,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.71 2007/05/18 15:46:09 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.72 2007/05/19 16:35:01 pooka Exp $");
#include <sys/param.h>
#include <sys/fstrans.h>
@ -856,7 +856,7 @@ puffs_inactive(void *v)
* node's life was already all it would ever be
*/
if (vnrefs == 0 || (pnode->pn_stat & PNODE_NOREFS)) {
pnode->pn_stat |= PNODE_NOREFS;
pnode->pn_stat |= PNODE_DYING;
vrecycle(ap->a_vp, NULL, ap->a_l);
}
@ -1085,7 +1085,8 @@ puffs_fsync(void *v)
pmp = MPTOPUFFSMP(vp->v_mount);
/* flush out information from our metacache, see vop_setattr */
if (pn->pn_stat & PNODE_METACACHE_MASK) {
if (pn->pn_stat & PNODE_METACACHE_MASK
&& (pn->pn_stat & PNODE_DYING) == 0) {
vattr_null(&va);
error = VOP_SETATTR(vp, &va, FSCRED, NULL);
if (error)
@ -1110,7 +1111,7 @@ puffs_fsync(void *v)
* has references neither in the kernel or the fs server.
* Otherwise we continue to issue fsync() forward.
*/
if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS))
if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING))
return 0;
dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY;
@ -1896,7 +1897,8 @@ puffs_strategy(void *v)
* Short-circuit optimization: don't flush buffer in between
* VOP_INACTIVE and VOP_RECLAIM in case the node has no references.
*/
if (pn->pn_stat & PNODE_NOREFS) {
if (pn->pn_stat & PNODE_DYING) {
KASSERT((bp->b_flags & B_READ) == 0);
bp->b_resid = 0;
goto out;
}