problem with linux emul on diskless nfs root

[mark]

Hey all, I'm running 5.2.1-p1 on trying to do PXEBOOT, nfs root, mfs tmp
and var.

It all works great, but when I try to execute a linux binary, I get a
panic "double fault". Sometimes it shows "nfs_getpages: error: 70".
That's the error for stale file.

I'm guessing linux emul is trying to do something in the read-only root
mount, but I haven't figured out where. ld.so.cache maybe?

thanks,
mark

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