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Date: Wed, 24 Sep 2014 17:30:45 +0200
From: Peter Holm <peter@holm.cc>
To: Konstantin Belousov <kostikbel@gmail.com>
Subject: Re: Deadlock with umount -f involving tmpfs on top of ZFS on r271170
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References: <5420D5FC.4030600@FreeBSD.org> <20140923131244.GC8870@kib.kiev.ua>
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 <20140924134725.GI8870@kib.kiev.ua>
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On Wed, Sep 24, 2014 at 04:47:25PM +0300, Konstantin Belousov wrote:
> On Wed, Sep 24, 2014 at 03:26:05PM +0200, Peter Holm wrote:
> > The patch is an improvement, but:
> > 
> > http://people.freebsd.org/~pho/stress/log/kostik718.txt
> 
> Does you load included both rename and link, or only one of those
> syscalls ?  I see a bug in the rename part of the patch, below is
> the update.
> 

Both. I have split the tests in two now. Uptime is by now one hour.
I'll let that run for a few hours more, before switching to random
tests.

I did get this page fault once:
http://people.freebsd.org/~pho/stress/log/kostik719.txt
but I guess it's unrelated? I have recompiled uma_core.c and
vm_pageout with "-O0" in case it shows up again.

- Peter