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Date: Wed, 6 Apr 2011 14:27:25 +0200
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From: Olivier Smedts <olivier@gid0.org>
To: Andrey Zonov <andrey@zonov.org>
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Cc: freebsd-stable@freebsd.org
Subject: Re: ZFS with compression causes deadlock
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2011/4/5 Andrey Zonov <andrey@zonov.org>:
> loader.conf:
> ahci_load=3D"YES"
> zfs_load=3D"YES"
> vfs.zfs.arc_max=3D"2G"
> vfs.zfs.cache_flush_disable=3D"1" # default: 0

Are you absolutely sure of what you're doing with the
vfs.zfs.cache_flush_disable tunable ? Since you have SATA disks, I
assume you don't have a controller with memory-backed write cache or
NVRAM.

> vfs.zfs.prefetch_disable=3D"1" =A0 =A0# default: 0
> vfs.zfs.txg.timeout=3D"5" =A0 =A0 =A0 =A0 # default: 30
> vfs.zfs.zio.use_uma=3D"0" =A0 =A0 =A0 =A0 # default: 0 (earlier was 1)

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