Date: Wed, 17 May 2017 00:23:24 +0530 From: "Kristof Provost" <kristof@sigsegv.be> To: "Andriy Gapon" <avg@FreeBSD.org> Cc: "Freebsd current" <freebsd-current@FreeBSD.org>, freebsd-fs@FreeBSD.org Subject: Re: zfs recv panic Message-ID: <96BF657D-34A8-4044-BC73-E0BCD1E98E52@sigsegv.be> In-Reply-To: <51bbf691-a8e2-2d16-6a95-c37a474c1dfe@FreeBSD.org> References: <18A74EE1-3358-4276-88EA-C13E28D8563A@sigsegv.be> <98df7d70-4ecb-34f2-7db2-d11a4b0c854a@FreeBSD.org> <B024E96F-4458-4C84-9982-97A09ED68B8B@sigsegv.be> <51bbf691-a8e2-2d16-6a95-c37a474c1dfe@FreeBSD.org>
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On 16 May 2017, at 19:58, Andriy Gapon wrote: > On 16/05/2017 16:49, Kristof Provost wrote: >> On 16 May 2017, at 15:41, Andriy Gapon wrote: >>> On 10/05/2017 12:37, Kristof Provost wrote: >>>> I have a reproducible panic on CURRENT (r318136) doing >>>> (jupiter) # zfs send -R -v zroot/var@before-kernel-2017-04-26 | nc >>>> dual 1234 >>>> (dual) # nc -l 1234 | zfs recv -v -F tank/jupiter/var >>>> >>>> For clarity, the receiving machine is CURRENT r318136, the sending >>>> machine is >>>> running a somewhat older CURRENT version. >>>> >>>> The receiving machine panics a few seconds in: >>>> >>>> receiving full stream of zroot/var@before-kernel-2017-04-03 into >>>> tank/jupiter/var@before-kernel-2017-04-03 >>>> panic: solaris assert: dbuf_is_metadata(db) == arc_is_metadata(buf) >>>> (0x0 == >>>> 0x1), file: >>>> /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c, >>>> line: 2007 >>> >>> could you please try to revert commits related to the compressed >>> send and see if >>> that helps? I assume that the sending machine does not have (does >>> not use) the >>> feature while the target machine is capable of the feature. >>> >>> The commits are: r317648 and r317414. Mot that I really suspect >>> that change, >>> but just to eliminate the possibility. >> >> Those commits appear to be the trigger. >> I’ve not changed the sender, but with those reverted I don’t see >> the panic any >> more. > > Thank you for testing. > Do you still have the old kernel / module and the crash dump? > It would interesting to poke around in frame 14. > > This contains the kernel and crash files: https://www.sigsegv.be/files/zfs_recv_kernel_crash.tar.bz2 I was running r318356 at the time of this panic. Regards, Kristof
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