Date: Fri, 27 Oct 2017 19:20:01 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: Freebsd fs <freebsd-fs@freebsd.org> Subject: Re: ZFS stalled after some mirror disks were lost Message-ID: <84A3920F-9143-40E9-A91D-13E7B7FB733E@gmail.com> In-Reply-To: <13AF09F5-3ED9-4C81-A5E2-94BA770E991B@gmail.com> References: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> <DDCFAC80-2D72-4364-85B2-7F4D7D70BCEE@gmail.com> <82632887-E9D4-42D0-AC05-3764ABAC6B86@gmail.com> <20171007150848.7d50cad4@fabiankeil.de> <DFD0528D-549E-44C9-A093-D4A8837CB499@gmail.com> <6d1c80df-7e9f-c891-31ae-74dad3f67985@internetx.com> <13AF09F5-3ED9-4C81-A5E2-94BA770E991B@gmail.com>
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On 13 Oct 2017 18:58, Ben RUBSON wrote: > The issue only happens when I disconnect iSCSI drives, it does not occurs > suddenly by itself. > So I would say the issue is on FreeBSD side, not network hardware :) > > 2 distinct behaviours/issues : > - 1 : when I disconnect iSCSI drives from the server running the pool > (iscsictl -Ra), some iSCSI drives remain on the system, leaving ZFS > stalled ; > - 2 : when I disconnect iSCSI drives from the target (shut NIC down / > shutdown ctld), server running the pool sometimes panics (traces in my > previous mail, 06/10). > > (...) > > Andriy, who took many debug traces from my system, managed to reproduce > the first issue locally, using a 3-way ZFS mirror with one local disk > plus two iSCSI disks. > Sounds like there is a deadlock issue on iSCSI initiator side. So, Andriy proposed a patch which solves this first issue : https://reviews.freebsd.org/D12652 > Regarding the second issue, I'm not able to reproduce it if I don't use > geom-labels. > There may then be an issue on geom-label side (which could then also > affect fully-local ZFS pools using geom-labels). and another one for the second issue : https://reviews.freebsd.org/D12809 Many thanks to the list, to Andriy for his nice & impressive work, Alexander & Edward for their reviews. Ben
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