kern/71968: USB disk triggers swap activity

Kris Kennaway kris at
Thu Sep 30 20:50:25 PDT 2004

The following reply was made to PR kern/71968; it has been noted by GNATS.

From: Kris Kennaway <kris at>
To: walter at
Cc: FreeBSD-gnats-submit at
Subject: Re: kern/71968: USB disk triggers swap activity
Date: Thu, 30 Sep 2004 20:42:17 -0700

 Content-Type: text/plain; charset=us-ascii
 Content-Disposition: inline
 On Tue, Sep 21, 2004 at 01:53:08PM +0200, Walter C. Pelissero wrote:
 > 	Sony Vaio PCG-XG9, LaCie 160G USB2 disk with UFS2 filesystem
 > 	mounted automatically by amd.
 > >Description:
 > 	When I do a substantial activity on a 160G USB2 disk the
 > 	system starts an heavy ATA disk activity that looks like
 > 	swapping because, even though there is still 50MB RAM
 > 	available, the swap usage jumps up to 14% and then slowly
 > 	reaches 17%.  Soon, one by one, the programs become
 > 	irresponsive and the system grinds to a halt (but the ATA
 > 	activity).  If I don't try it immediately, ssh from another
 > 	node yields a connection timeout.  Needless to say the USB
 > 	keyboard and mouse die immediately, while I can still use the
 > 	trackpad on the laptop.
 > >How-To-Repeat:
 > 	dd if=/dev/zero of=/path/to/the/usb/filesystem
 Does the problem persist with 5.3?
 Does 'top' or 'ps' show any unusual activity?
 Content-Type: application/pgp-signature
 Content-Disposition: inline
 Version: GnuPG v1.2.6 (FreeBSD)

More information about the freebsd-bugs mailing list