Re: kern/54945 (nfs uvm_pagegetdirty panic)

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

The following reply was made to PR kern/54945; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: Andrew Doran <ad%netbsd.org@localhost>
Cc: gnats-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
 prlw1%cam.ac.uk@localhost
Subject: Re: kern/54945 (nfs uvm_pagegetdirty panic)
Date: Mon, 24 Feb 2020 23:09:27 +0900

 Hi,
 
 On 2020/02/23 8:22, Andrew Doran wrote:
 > Thank you for the detailed investigation.  I think this is unlikely to be a
 > pmap prolem, since the assertion is concerned with software state - CLEAN
 > and DIRTY are very definite states set by UVM.  The pmap only comes into
 > play if the page's state is UNKNOWN.  The NFS changes on yamt-pagecache are
 > unlikey to help either, as you discovered.  I need to think about this one
 > more.
 
 Thank you for your comment! I'll keep trying to figure out what goes on.
 
 rin