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the work-around in rev. 1.37 (turn off async) wasn't enough to prevent 

hangs under heavy load.  so we now apply the more extreme version:
make MFS mounts "sync".  fixes PRs 17128 and 17321.
This commit is contained in:
chs 2002-10-24 16:41:00 +00:00
parent e4a36f578d
commit ea6ddab6a8
1 changed files with 5 additions and 2 deletions
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7
sys/ufs/mfs/mfs_vfsops.c
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@ -1,4 +1,4 @@
/* $NetBSD: mfs_vfsops.c,v 1.41 2002/09/21 18:14:51 christos Exp $ */
/* $NetBSD: mfs_vfsops.c,v 1.42 2002/10/24 16:41:00 chs Exp $ */
/*
* Copyright (c) 1989, 1990, 1993, 1994
@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mfs_vfsops.c,v 1.41 2002/09/21 18:14:51 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: mfs_vfsops.c,v 1.42 2002/10/24 16:41:00 chs Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
@ -264,8 +264,11 @@ mfs_mount(mp, path, data, ndp, p)
* the problem is that MFS needs to allocate pages to clean pages,
* so if we wait until the last minute to clean pages then there
* may not be any pages available to do the cleaning.
* ... and since the default partially-synchronous mode turns out
* to not be sufficient under heavy load, make it full synchronous.
*/
mp->mnt_flag &= ~MNT_ASYNC;
mp->mnt_flag |= MNT_SYNCHRONOUS;
error = copyin(data, (caddr_t)&args, sizeof (struct mfs_args));
if (error)