Date: Tue, 17 Feb 1998 02:10:09 -0600 (CST) From: toasty@dragondata.com To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/5768: Shutdown aborts syncing, when sync isn't done. Message-ID: <199802170810.CAA01127@shell.dragondata.com>
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>Number: 5768
>Category: kern
>Synopsis: Shutdown aborts syncing, when sync isn't done.
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 17 00:20:01 PST 1998
>Last-Modified:
>Originator: Kevin Day
>Organization:
DragonData Internet Services
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
2.2.x and -current
>Description:
Quite often, when rebooting or shutting down a system, the drive is
slowly syncing, but the kernel doesn't give it a chance to finish.
Just tonight, I saw:
syncing disks:
22 22 22 22 22 22 21 21 20 19 18 15 13 10 8 8 4 4 3 2 giving up....
It was obvious that it was going to finish, it just didn't give it enough of a
chance.
>How-To-Repeat:
I'm not sure why this happens sometimes, it just does. :)
>Fix:
Here's a simple patch that makes it a bit more smart. If sync is
making progress, don't stop it.
I'm not too up on the current style/guidelines for kernel changes.
Even though this is minor, feel free to show me the error of my ways if you
disapprove. :)
--- kern_shutdown.c.orig Tue Feb 17 01:52:07 1998
+++ kern_shutdown.c Tue Feb 17 01:59:50 1998
@@ -211,6 +211,7 @@
if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) {
register struct buf *bp;
int iter, nbusy;
+ int lastnbusy = 0;
waittime = 0;
printf("\nsyncing disks... ");
@@ -228,6 +229,9 @@
break;
printf("%d ", nbusy);
DELAY(40000 * iter);
+ if (lastnbusy > nbusy)
+ iter = 0;
+ lastnbusy = nbusy;
}
if (nbusy) {
/*
This just stops it from giving up if it had recently made any progress.
I tried it quickly on here, and it seemed to work, but I don't know the
ramifications for my actions. :)
Kevin
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