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List:       netbsd-tech-kern
Subject:    Re: two historical question about kern_ktrace.c
From:       enami tsugutomo <enami () but-b ! or ! jp>
Date:       2004-02-28 3:25:02
Message-ID: 20040228032502.8DFFE2ECA () decoy ! but-b ! or ! jp
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Ok, I've got an example of deadlock.  slogin and ktruss -i the sshd.
ktruss waits for tty output and write of trace data to pipe blocks.
I guess I can drop a new entry if queue length is long.

> I seem to vaguely recall some similar-sounding changes so that ktrace
> could write out the trace file to NFS, but my memory is pretty hazy on 
> this, so I could be out in left field :-)

Ya, NFS will make hang due to ktrcsw() easier than local file system.

enami.
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