Date: Mon, 07 Jun 2010 09:22:03 -0400 From: jhell <jhell@dataix.net> To: Sergiy Suprun <sergiy.suprun@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: zfs filesystem problem Message-ID: <4C0CF27B.1050402@dataix.net> In-Reply-To: <AANLkTil2-wsv2KvCOHmPVpQuf7q0uF16x2xh6NXJPgIS@mail.gmail.com> References: <4C0C6B54.8020005@ish.com.au> <AANLkTil2-wsv2KvCOHmPVpQuf7q0uF16x2xh6NXJPgIS@mail.gmail.com>
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On 06/07/2010 01:46, Sergiy Suprun wrote: > On Mon, Jun 7, 2010 at 06:45, Jurgen Weber <jurgen@ish.com.au> wrote: > >> Hello >> >> I have a FreeBSD 8.0-p2 system, which runs two pools. One with 6 disks all >> mirrored for our data and another mirrored pool for the OS. The system has >> 16GB of RAM. >> >> I have a nightly cron script running which takes a snapshot of a particular >> file system within the storage pool. This has been running for just over a >> month now without any issues until this weekend. >> >> Now we can not access the mentioned file system. If we try to `ls` to it or >> `cd` into it the shell locks up (not even kill -9 can stop the `ls` >> processes, etc) and top shows that the process state is `zfs`. This is most likely caused by some bugs that were found and fixed in stable/8. One of the commits that mm@ made has touched that zio->iowait that you should see your processes are stuck in. There still seems "at least in my case" some zio->iowait problems going on but I have not pinned that down to the cause yet, but they have not caused any of my system proccesses to freeze in that state. Grab a kernel from one of the snapshots that were made sometime last month to test this out just to be sure so your not upgrading for no reason. When I say kernel I mean kernel & modules that go with it as ZFS is a module and you will obviously need that. Please report back on your findings if the kernel from stable fixed your problem. URL to retrieve snapshots: http://bit.ly/aLoXXV Good Luck!, <Irrelevant> > Hello. > How about scrub ? > And which size of your pools and how many place used by data+snapshots? </Irrelevant>. -- jhell
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