Date: Thu, 8 Nov 2007 07:36:01 +0100 From: Martijn Plak <martijn@plak.net> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS kmem_map too small. Message-ID: <A6EC4B67-1F5B-4FA2-BF11-8194EB768C36@plak.net> In-Reply-To: <20071107170147.GN15618@garage.freebsd.pl> References: <20071005000046.GC92272@garage.freebsd.pl> <20071008121523.GM2327@garage.freebsd.pl> <20071105215035.GC26730@heff.fud.org.nz> <2e77fc10711051531k41e7224dq6aaedb35cad8d9f2@mail.gmail.com> <6214AB9C-9F9B-4B9D-8B05-0B3DF5F6C16D@SARENET.ES> <20071106100015.GB5268@garage.freebsd.pl> <9A147CEC-D5E6-4117-8C69-16E40DB45B22@SARENET.ES> <20071106125552.GO5268@garage.freebsd.pl> <5ED261E6-A85A-4D7D-A01A-4688802FECB9@plak.net> <20071107170147.GN15618@garage.freebsd.pl>
next in thread | previous in thread | raw e-mail | index | archive | help
>> === cat /boot/loader.conf >> # Load ZFS and load root system from the RAID-Z array. >> zfs_load="YES" >> vfs.root.mountfrom="zfs:raid/sys/root" >> >> # Tune ZFS and VM parameters. >> #vfs.zfs.arc_max="64M" >> #kern.maxvnodes="50000" >> #vm.kmem_size_max="512M" >> #vm.kmem_size="512M" >> === sysctl vm | grep kmem >> vm.kmem_size_scale: 3 >> vm.kmem_size_max: 335544320 >> vm.kmem_size_min: 0 >> vm.kmem_size: 335544320 > > The only tuning that is needed (and ZFS will warn now about this) is > vm.kmem_size/vm.kmem_size_max. Can you set those back to 512M and > retry? I set the vm.kmem_size and vm.kmem_size_max values back to 512M and rebooted. After about 7 hours, during the second "make buildworld" in parallel with additional network and disk activity, the machine experienced a kmem_map too small panic again. This time, the machine hung, no crash dump was available. Do you want me to update the kernel sources? I'm using Nov 5 sources at the moment.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?A6EC4B67-1F5B-4FA2-BF11-8194EB768C36>