Date: Fri, 18 Dec 2009 23:04:24 +0300 From: "Alexander Zagrebin" <alexz@visp.ru> To: "'Attilio Rao'" <attilio@freebsd.org> Cc: freebsd-current@freebsd.org Subject: RE: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem) Message-ID: <FECE64D8325144AD8E65DF1F1D1B0D35@vosz.local> In-Reply-To: <3bbf2fe10912181004w2a1abff2re8f77fd6a8bc3233@mail.gmail.com> References: <39309F560B98453EBB9AEA0F29D9D80E@vosz.local> <3bbf2fe10912181004w2a1abff2re8f77fd6a8bc3233@mail.gmail.com>
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> > 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 fo your attempt to help! I've successfully applied this patch to RELENG_8_0, recompiled kernel and required modules (krpc, opensolaris,zfs), but nothing has changed. The problem still exist. -- Alexander Zagrebin
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