Date: Fri, 18 Sep 2009 00:59:42 +0200 From: Patrick Lamaiziere <patfbsd@davenulle.org> To: freebsd-current@freebsd.org Subject: Re: [ZFS] panic vm_fault : fault on no fault entry (when superpages are enabled) Message-ID: <20090918005942.0a4d5ca8@baby-jane.lamaiziere.net> In-Reply-To: <20090917132127.2a0ee973@baby-jane.lamaiziere.net> References: <20090917132127.2a0ee973@baby-jane.lamaiziere.net>
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Le Thu, 17 Sep 2009 13:21:27 +0200, Patrick Lamaiziere <patfbsd@davenulle.org> a =E9crit : Hello, > [8.0 BETA-4/i386] >=20 > I've got this panic when copying /usr on a new pool. > It's 100% reproductible here with=20 > tar cf - -C /usr . |=A0tar xpvf - -C /pool >=20 > The panic occurs always with free() in the ZFS code. ... > /boot/loader.conf > # ZFS > vm.kmem_size=3D"512M" > vm.kmem_size_max=3D"512M" > vfs.zfs.arc_max=3D"40M" > vfs.zfs.vdev.cache.size=3D"5M" >=20 > and options KVA_PAGES=3D512 in my kernel I think I've found the culprit: superpages. With vm.pmap.pg_ps_enabled=3D"1", my box will panic in the next five minutes when doing a simple tar on ZFS. Looks good without the superpages. Is it a known problem? Thanks, regards.
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