Date: Tue, 5 Oct 2004 10:00:47 GMT From: "Walter C. Pelissero" <walter@pelissero.de> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/71968: [usb] USB disk triggers swap activity Message-ID: <200410051000.i95A0l85043666@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR kern/71968; it has been noted by GNATS. From: "Walter C. Pelissero" <walter@pelissero.de> To: freebsd-gnats-submit@FreeBSD.org, Kris Kennaway <kris@obsecurity.org>, walter@pelissero.de Cc: Subject: Re: kern/71968: [usb] USB disk triggers swap activity Date: Tue, 5 Oct 2004 11:58:43 +0200 > > 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? Sorry for the late answer. It took me a while to upgrade to 5.3-BETA7. I don't seem to be able to reproduce the problem under the new system, so I'd consider this PR closed. > Does 'top' or 'ps' show any unusual activity? The swap stats above came indeed from top. It was indeed unusual for me to see a stadily increasing swap allocation while still having 20% of RAM untouched. In the meanwhile no process showed any substantial increase in size. -- walter pelissero http://www.pelissero.de
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200410051000.i95A0l85043666>