Date: Mon, 28 May 2007 18:40:29 GMT From: Michael<elshar@cheekan.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/113098: Cannot read from amrd while under heavy load Message-ID: <200705281840.l4SIeTV6052159@www.freebsd.org> Resent-Message-ID: <200705281850.l4SIo2bF029015@freefall.freebsd.org>
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>Number: 113098
>Category: kern
>Synopsis: Cannot read from amrd while under heavy load
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon May 28 18:50:02 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: Michael
>Release: 6.2-release
>Organization:
>Environment:
FreeBSD jailserver 6.2-RELEASE-p5 FreeBSD 6.2-RELEASE-p5 #0: Sat May 26 06:19:58 PDT 2007 root@jailserver:/usr/obj/usr/src/sys/SMP amd64
>Description:
When I put a heavy load on the array, I can't do any kind of reads from it until the process finishes.
>How-To-Repeat:
A small perl script I wrote to do it (my array is mounted on /mnt/test1):
#!/usr/bin/perl
my $i = 0;
while ($i <= 100) {
system("dd if=/dev/zero of=/mnt/test1/ddfile-" . $i . " bs=1m count=100 &\n");
$i++;
}
While this script is running, I can't do anything that reads the array. The only thing I can do is watch gstat and see that it's getting data written to it.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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