Date: Tue, 10 Mar 2015 18:07:43 +0300 From: Emil Muratov <gpm@hotplug.ru> To: freebsd-fs@freebsd.org Subject: Re: ZFS Deadlock? Message-ID: <54FF08BF.6030001@hotplug.ru> In-Reply-To: <CAM72HBb0C-DQszMZFH706rP4hJK_V9dJdVzmtSJqqafue2ud9Q@mail.gmail.com> References: <CAM72HBb0C-DQszMZFH706rP4hJK_V9dJdVzmtSJqqafue2ud9Q@mail.gmail.com>
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On 07.03.2015 06:13, Nick Sivo wrote: > Hi, > > One of our servers occasionally exhibits strange behavior under heavy > IO load. I think, based on the output from procstat -kk -a, it may be > a ZFS or VFS deadlock. Certain operations, including anything > involving the ZFS commands like zfs and zpool will hang. Running ls at > the root of a ZFS filesystem will also hang. Trying to access > snapshots in the .zfs/ folder will hang. None of these hung processes > can be killed. Eventually the machine will panic, if we don't reboot > it first, but that can take days after we start seeing this issue. > Strangely, our primary application (Hacker News) will keep running > without interruption until the panic. > > Hi. What is your hw specs (controller/drives)? I had an issues like yours some time ago with one of my storages. Not sure what was the cause of it, there were some parts replaced.
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