Date: Wed, 14 May 2008 10:15:21 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: d@delphij.net Cc: stable@freebsd.org, Ben Stuyts <ben@altus-escon.com> Subject: Re: Panic after hung rsync, probably zfs related Message-ID: <482A9F99.4040500@FreeBSD.org> In-Reply-To: <4829F1B8.1000707@delphij.net> References: <7A0780B6-AD8E-440B-BFDB-EC2C4ACA1A70@altus-escon.com> <4829F1B8.1000707@delphij.net>
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Xin LI wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Ben Stuyts wrote: > | Hi, > | > | While doing an rsync from a zfs filesystem to an external usb hd (also > | zfs), the rsync processes hung in zfs state. I could not kill these > | processes, although the rest of the server seemingly continued to run > | fine. The reboot command did not work. Next I tried a shutdown now > | command. This caused a panic: > > Sound like you somehow run out of memory, there is an known issue with > ZFS which causes livelock when there is memory pressure. Which rsync > version are you using? With rsync 3.x the memory usage would drop > drastically which would help to prevent this from happening. This isn't known to cause a double fault though. Unfortunately we probably need more information than was available in order to proceed. Kris
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