From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <140e7ec30808051101n5df6bcdbx4ab515e643f5d9f@mail.gmail.com>
Date: Wed,  6 Aug 2008 02:01:17 +0800
From: sqweek <sqweek@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
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Subject: [9fans] Bizarre freeze
Topicbox-Message-UUID: fb0d7e60-ead3-11e9-9d60-3106f5b1d025

 Ran into an interesting one setting up my cpu server. The following
reliably freezes the box:

# echo dma on >/dev/sdC0/ctl
# 9fat:

 Leaves the console totally unresponsive, no ^T^Tp, no ^P. rc -x on
9fat: gives "rfork e" as the final command.
 sdC0 is a cdrom. I can turn dma on for my sata disks (sdE0/sdF0) no problem.
-sqweek