Re: kern/47739: tmpfs panic: kernel diagnostic assertion "(node)->tn_spec.tn_dir.tn_readdir_lastp == NULL..."

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

Thomas Klausner <wiz%NetBSD.org@localhost> wrote:
> The following reply was made to PR kern/47739; it has been noted by GNATS.
> 
> From: Thomas Klausner <wiz%NetBSD.org@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: 
> Subject: Re: kern/47739: tmpfs panic: kernel diagnostic assertion
>  "(node)->tn_spec.tn_dir.tn_readdir_lastp == NULL..."
> Date: Mon, 22 Jul 2013 19:42:17 +0200
> 
>  These are highly reproducible.
>  
>  Whenever I do a bulk build from scratch, I usually reboot at least
>  once due to it.
>  
>  Can someone please take a look?
>   Thomas

Most likely this is due to tmpfs_dircookie() truncation here:

http://nxr.netbsd.org/source/xref/src/sys/fs/tmpfs/tmpfs.h#88

It is wrong and there are other PRs because of it.  Thomas, you can test
this by replacing the function body with the following:

        return (off_t)(uintptr_t)de;

This breaks linux32 compat, but we really just need to decide how we want
to fix it (it would be good to avoid penalising the native code, but better
to penalise than fail).

-- 
Mindaugas