Date: Wed, 3 Mar 2004 22:07:17 +0000 From: Nik Clayton <nik@freebsd.org> To: current@freebsd.org Subject: System hangs with vnode backed md(4) devices -- still a problem? Message-ID: <22B16B3E-6D5F-11D8-BDE4-000393863D48@freebsd.org>
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Toward the end of last year, through to earlier this year, -current had
a problem with vnode backed md(4) devices. Specifically,
truncate -s 6G foo.md
mdconfig -a -t vnode -f foo.md -u 0
newfs /dev/md0
mount /dev/md0 /mnt
rsync /large/amount/of/data /mnt
would cause the rsync process to eventually get stuck in a wdrain
state, and other processes in the system would gradually hang --
processes were still running, but doing anything that might need to
read from a buffer caused the process to hang. Eventually, everything
would be hung.
If I'm reading the mailing lists right, this was supposed to be solved
here:
http://lists.freebsd.org/pipermail/freebsd-current/2003-November/
013183.html
However, I'm still seeing the problem in -current from Jan 14th. So
I'm wondering if anyone else is seeing it, and if not, a rough idea of
when it was fixed. I'm trying to avoid the pain of updating to a very
recent current (nVidia issues, having to spend days rebuilding ports)
if the problem still exists.
Cheers,
N
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