Date: Fri, 18 Dec 2009 19:04:50 +0100 From: Attilio Rao <attilio@freebsd.org> To: Alexander Zagrebin <alexz@visp.ru> Cc: freebsd-current@freebsd.org Subject: Re: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem) Message-ID: <3bbf2fe10912181004w2a1abff2re8f77fd6a8bc3233@mail.gmail.com> In-Reply-To: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local> References: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local>
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2009/12/17 Alexander Zagrebin <alexz@visp.ru>: > Hi! > > I use onboard ICH7 SATA controller with two disks attached: > > atapci1: <Intel ICH7 SATA300 controller> port > 0x30c8-0x30cf,0x30ec-0x30ef,0x30c0-0x30c7,0x30e8-0x30eb,0x30a0-0x30af irq 19 > at device 31.2 on pci0 > atapci1: [ITHREAD] > ata2: <ATA channel 0> on atapci1 > ata2: [ITHREAD] > ata3: <ATA channel 1> on atapci1 > ata3: [ITHREAD] > ad4: 1430799MB <Seagate ST31500541AS CC34> at ata2-master SATA150 > ad6: 1430799MB <WDC WD15EADS-00P8B0 01.00A01> at ata3-master SATA150 > > The disks are used for mirrored ZFS pool. > I have noticed that the system periodically locks up on disk operations. > After approx. 10 min of very slow disk i/o (several KB/s) the speed of disk > operations restores to normal. > gstat has shown that the problem is in ad6. Want you try this patch and report?: http://people.freebsd.org/~attilio/lockmgr_lostwake.diff It should apply to STABLE_8 and if not, just report and I will help. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein
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