[SSI-devel] [ ssic-linux-Bugs-961633 ] rc5 - dd if=/dev/1/zero of=/dev/null crashes node

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Bugs item #961633, was opened at 2004-05-27 08:13
Message generated for change (Comment added) made by jlbyrne
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Category: Devices
Group: None
Status: Open
Resolution: None
Priority: 2
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Vinod Vijayarajan (vvinod)
Summary: rc5 - dd if=/dev/1/zero of=/dev/null crashes node

Initial Comment:
On a node other than 1 dd if=/dev/1/zero of=/def/null
crashes the node.

It seems to be in an infinite recursion:

... cfs_dev_open calls
ssidev_remote_open calls
ssidev_local_open calls
dentry_open calls
dentry_open_it calls
cfs_dev_open ...



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>Comment By: John Byrne (jlbyrne)
Date: 2004-05-27 18:31

Message:
Logged In: YES 
user_id=296930

If this code was working the way it was intended to, this
command probably wouldn't probably wouldn't work as
expected. /dev/zero and /dev/null are treated as special
cases and all attempts to open them are supposed to open the
device on the local node. So, if this was an attempt to
measure local vs remote performance, it wouldn't have worked
as expected. If things were working, of course.


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