Date: Sat, 21 Sep 2013 00:27:48 +0000 From: "Teske, Devin" <Devin.Teske@fisglobal.com> To: freebsd-fs <freebsd-fs@freebsd.org> Cc: Devin Teske <dteske@freebsd.org>, "Teske, Devin" <Devin.Teske@fisglobal.com> Subject: zfs upgrade hang Message-ID: <13CA24D6AB415D428143D44749F57D720FBE11B0@LTCFISWMSGMB21.FNFIS.com>
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Hi, Seem to be having an issue with "zfs upgrade" hanging. Please note that "zpool upgrade" seems to be fine... it's "zfs upgrade" tha= t hangs. The system is 8.4-STABLE @ r255470M amd64. The dataset versions prior to upgrade are 3 and after upgrade are 5. It doesn't always hang. But once it does, it's always in the following ^T s= tate: tx->tx_sync_done_cv You can let it sit there for minutes or hours, but it never completes or en= ters a different state. Also, you can't Ctrl-C it, you can't Ctrl-Z it, you can't = kill it, not even with `-9'. Further, anything like "zfs list" will hang. All the meanwhile, = the filesystem is readable and fine. The sure-fire way to hit this for us is to attempt a "-a" or "-r" or "-ra" = to do many datasets at once. However, doing one dataset at a time will work... until it too leads to the= same state. Once we hit this state (hung upgrade) we have to reboot. We've been able to get through all the datasets on a box by doing one-at-a-= time and rebooting when one hangs and ends up in this state but it's frustrating bec= ause we can usually only do a handful at a time before hitting the problem. Scripting it won't help. Also, we've tried unmounting the filesystems prior to upgrade too, that did= n't help. Updating libraries/binaries to r255747 didn't seem to help either. I guess = next step is to update the kernel to latest stable/8 (which is probably not far ahead of r2= 55470). Advice? --=20 Devin _____________ The information contained in this message is proprietary and/or confidentia= l. If you are not the intended recipient, please: (i) delete the message an= d all copies; (ii) do not disclose, distribute or use the message in any ma= nner; and (iii) notify the sender immediately. In addition, please be aware= that any message addressed to our domain is subject to archiving and revie= w by persons other than the intended recipient. Thank you.
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