Date: Fri, 19 Jun 2009 11:46:40 +0400 From: Kamigishi Rei <spambox@haruhiism.net> To: freebsd-current@freebsd.org Subject: Following vm_lowmem event handler for dirhash Message-ID: <4A3B4260.6070200@haruhiism.net>
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Hello, hope you're having a nice day, Following http://lists.freebsd.org/pipermail/freebsd-current/2009-May/007367.html > It adds a vm_lowmem event handler to the dirhash code in UFS2 > so that dirhashes will be deleted when the system is low on memory. From what I gather, this patch is in -CURRENT now; I've updated to -CURRENT 3 days ago (after using a snapshot from May) and my previously stable system threw a kernel panic yesterday. Panic happened during a benchmark on my ZFS pool (bonnie++ -s 32768) supposedly because of that exact patch (because ZFS is known to eat a lot of kmem and vm_lowmem was probably triggered). Alas, I don't have a dump available (because my system boots from a geom mirror and the swap space is there as well), so I only have the panic message: "dirhash: NULL hash on list". My system is a Core2 Duo on a Q35 motherboard, using 2GB RAM and 4x 500GB drives, of which 2 are in a GEOM_MIRROR and the other 2 are in a zpool. fujibayashi@ameagari ~ % uname -a FreeBSD ameagari.fujibayashi.jp 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Tue Jun 16 21:50:53 JST 2009 root@ameagari.fujibayashi.jp:/usr/obj/usr/src/sys/Ameagari amd64 (Last line in /usr/src/UPDATING states "20090613".) -- Kamigishi Rei Systems Administrator WIDE
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