Date: Thu, 24 Aug 2017 16:10:57 -0400 From: Mike Tancsa <mike@sentex.net> To: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: file system deadlock in RELENG_11 Message-ID: <4ec50e48-58a5-1f49-3acf-d3b21535c36e@sentex.net> In-Reply-To: <28c89f80-4797-7e95-a637-472ac7bc98a5@sentex.net> References: <66b97b27-cbea-a3a8-374d-3f7c017b5418@sentex.net> <28c89f80-4797-7e95-a637-472ac7bc98a5@sentex.net>
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On 8/24/2017 4:01 PM, Mike Tancsa wrote: > OK, this is fairly easy to repeat. If I start a sync of a snapshot via > zrep, it hangs the box. CTRL+T shows > > > DEBUG: overiding stale lock on zroot/chyves from pid 19378 > sending zroot/chyves@zrep_000010 to 10.151.9.2:zroot/chyves > cannot receive new filesystem stream: destination > 'zroot/chyves/guests/resi/disk1' exists > must specify -F to overwrite it > ^C > load: 0.48 cmd: zfs 29690 [tx->tx_sync_done_cv] 358.94r 0.00u 0.00s 0% > 3476k > load: 0.48 cmd: zfs 29690 [tx->tx_sync_done_cv] 360.42r 0.00u 0.00s 0% I was able to get ps to run and not sure if its helpful or not, but these are the two unkillable zfs processes root 5 0.0 0.0 0 128 - DL 10:09 0:05.58 [zfskern] root 29683 0.0 0.0 7752 3824 5 DE+ 15:53 0:00.32 zfs send -R -I zroot/chyves@zrep_00000d zroot/chyves@zrep_000010 root 29690 0.0 0.0 7752 3492 5 D+ 15:53 0:00.00 zfs rename zroot/chyves@zrep_000010 zroot/chyves@zrep_000010_unsent -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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