Date: Sun, 20 Jul 2003 02:06:16 -0400 (EDT) From: Bryan Liesner <bleez@comcast.net> To: Juli Mallett <jmallett@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: USB crappiness? Message-ID: <20030720015113.A536@gravy.homeunix.net> In-Reply-To: <20030719194215.A6668@FreeBSD.org> References: <20030719194215.A6668@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, 19 Jul 2003, Juli Mallett wrote: > Hi, > > I tried to upgrade my workstation to current recently, and I have to > use a lot of USB, and while using some USB mass storage device, with > a UFS filesystem on it, and doing a large operation to it (tar c|tar x) > everything deadlocked on ufs, the USB stack blew up, and upon causing > an interrupt to it, it panicked, and panic pagefaulted. > > Anyone else seeing these sorts of cohesive fallovers? > > Thanx, > juli. > Yes, I can confirm that. I do an nightly dump to a file on my USB hard disk (ehci). I woke up to find a screen full of read errors, and at first I thought the disk went belly up. I reverted back and it was working fine. I/O speed has _seriously_ degraded as well. Prior to the bus dma patches, I was getting a little better than 8 MB/s writes to the disk, afterwards, less than 2 MB/s. The "performance hit" discussed prior to the commit is a bit of an understatement. -Bryan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030720015113.A536>