[src/trunk]: src/sys/nfs fix nfs iod management so we don't lose i/os when io...

[chs <chs%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/61442e3c48a7
branches:  trunk
changeset: 498416:61442e3c48a7
user:      chs <chs%NetBSD.org@localhost>
date:      Mon Oct 23 07:18:27 2000 +0000

description:
fix nfs iod management so we don't lose i/os when iods die.

diffstat:

 sys/nfs/nfs_syscalls.c |  17 +++++++++--------
 1 files changed, 9 insertions(+), 8 deletions(-)

diffs (40 lines):

diff -r 2a41a1d92fc2 -r 61442e3c48a7 sys/nfs/nfs_syscalls.c
--- a/sys/nfs/nfs_syscalls.c    Mon Oct 23 06:56:00 2000 +0000
+++ b/sys/nfs/nfs_syscalls.c    Mon Oct 23 07:18:27 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nfs_syscalls.c,v 1.44 2000/09/19 22:14:42 fvdl Exp $   */
+/*     $NetBSD: nfs_syscalls.c,v 1.45 2000/10/23 07:18:27 chs Exp $    */
 
 /*
  * Copyright (c) 1989, 1993
@@ -951,13 +951,7 @@
                error = tsleep((caddr_t)&nfs_iodwant[myiod],
                        PWAIT | PCATCH, "nfsidl", 0);
            }
-           if (error) {
-               if (nmp)
-                   nmp->nm_bufqiods--;
-               nfs_iodmount[myiod] = NULL;
-               break;
-           }
-           while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
+           while (nmp != NULL && (bp = nmp->nm_bufq.tqh_first) != NULL) {
                /* Take one off the front of the list */
                TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
                nmp->nm_bufqlen--;
@@ -979,8 +973,15 @@
                    break;
                }
            }
+           if (error) {
+                   break;
+           }
        }
        p->p_holdcnt--;
+       if (nmp)
+               nmp->nm_bufqiods--;
+       nfs_iodwant[myiod] = NULL;
+       nfs_iodmount[myiod] = NULL;
        nfs_asyncdaemon[myiod] = NULL;
        nfs_numasync--;