Date: Fri, 15 Jun 2007 23:00:04 +0930 From: Benjamin Close <Benjamin.Close@clearchain.com> To: freebsd-current@freebsd.org Subject: Swapfile on ZFS & Deadlock Message-ID: <4672945C.3060304@clearchain.com>
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Hi All,
Whilst running out of memory compiling Xorg (scanPCI is a killer) I
discovered a quick way to deadlock the system:
dd if=/dev/zero of=somefileonzfs bs=something count=something
mdconfig -a -f something
swapon /dev/md0
Then do something that needs swap.. instant deadlock. The system is
still responsive but all disk access become hung.
Known issue? If so is there a way we can warn users/prevent users from
doing it?
Cheers,
Benjamin
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