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Add sysctl options for the syncer: 

vfs.sync.delay: max time to delay syncing data
vfs.sync.filedelay: time to delay syncing files
vfs.sync.dirdelay: time to delay syncing directories
vfs.sync.metadelay: time to delay syncing metadata

Note that using a value of 0 is allowed, but it's not
recommended.
This commit is contained in:
xtraeme 2005-09-11 17:55:56 +00:00
parent 74051a244a
commit 0cbb812de5
1 changed files with 49 additions and 2 deletions
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51
sys/miscfs/syncfs/sync_subr.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: sync_subr.c,v 1.18 2005/05/30 22:13:50 christos Exp $ */
/* $NetBSD: sync_subr.c,v 1.19 2005/09/11 17:55:56 xtraeme Exp $ */
/*
* Copyright 1997 Marshall Kirk McKusick. All Rights Reserved.
@ -32,10 +32,11 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sync_subr.c,v 1.18 2005/05/30 22:13:50 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: sync_subr.c,v 1.19 2005/09/11 17:55:56 xtraeme Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/mount.h>
@ -262,3 +263,49 @@ speedup_syncer()
stat_rush_requests += 1;
return (1);
}
SYSCTL_SETUP(sysctl_vfs_syncfs_setup, "sysctl vfs.sync subtree setup")
{
const struct sysctlnode *rnode, *cnode;
sysctl_createv(clog, 0, NULL, &rnode,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "vfs", NULL,
NULL, 0, NULL, 0,
CTL_VFS, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &rnode,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "sync",
SYSCTL_DESCR("syncer options"),
NULL, 0, NULL, 0,
CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "delay",
SYSCTL_DESCR("max time to delay syncing data"),
NULL, 0, &syncdelay, 0,
CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "filedelay",
SYSCTL_DESCR("time to delay syncing files"),
NULL, 0, &filedelay, 0,
CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "dirdelay",
SYSCTL_DESCR("time to delay syncing directories"),
NULL, 0, &dirdelay, 0,
CTL_CREATE, CTL_EOL);
sysctl_createv(clog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "metadelay",
SYSCTL_DESCR("time to delay syncing metadata"),
NULL, 0, &metadelay, 0,
CTL_CREATE, CTL_EOL);
}