Date: Tue, 19 May 2009 12:43:00 -0700 From: Kip Macy <kmacy@freebsd.org> To: Ben Kelly <ben@wanderview.com> Cc: Adam McDougall <mcdouga9@egr.msu.edu>, current@freebsd.org, Larry Rosenman <ler@lerctr.org> Subject: Re: Fatal trap 12: page fault panic with recent kernel with ZFS Message-ID: <3c1674c90905191243h4c188c93j71d68b060e54dbf5@mail.gmail.com> In-Reply-To: <4A88C71B-B338-4031-B591-FED323E067DC@wanderview.com> References: <20090518145614.GF82547@egr.msu.edu> <3c1674c90905181659g1d20f0f1w3f623966ae4440ec@mail.gmail.com> <alpine.BSF.2.00.0905181906001.2008@borg> <20090519012202.GR82547@egr.msu.edu> <3c1674c90905181826p787a346cie90429324444a9c4@mail.gmail.com> <1F20825F-BD11-40D1-9024-07F6E707DD08@wanderview.com> <3c1674c90905181945g179173b9rb064e8b37ba7148@mail.gmail.com> <68B339AA-75CF-41FC-9E09-81D20D6F1FBA@wanderview.com> <3c1674c90905182012g63c3010bjf9cd7f0a2104966c@mail.gmail.com> <4A88C71B-B338-4031-B591-FED323E067DC@wanderview.com>
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> I thought I was referring to that too. :-) I guess I thought signaling the > pageout daemon to move vnodes from active to inactive was the way to do > that. Are you saying there is another caching layer of vnodes going on in > zfs? I'll look around for that this evening. I apologize. Again you are correct. However, I don't see that helping. The VM doesn't associate arc cache pages with ZFS vnodes. So I don't see that helping in this case. We need some way of coupling the two. The challenge with the ARC is that it caches logical disk blocks, not file pages. Cheers, Kiphelp
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