Date: Mon, 13 Oct 2014 18:15:58 -0700 From: "K. Macy" <kmacy@freebsd.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: "freebsd-fs@FreeBSD.org" <freebsd-fs@freebsd.org>, FreeBSD Stable <freebsd-stable@freebsd.org>, mark <Mark.Martinec@ijs.si> Subject: Re: zpool import hangs when out of space - Was: zfs pool import hangs on [tx->tx_sync_done_cv] Message-ID: <CAHM0Q_O7LNBiQAEjygANa%2B0rqm9cywjTPbNXabB4TePfEHAZsA@mail.gmail.com> In-Reply-To: <E3C3C359999140B48943A0E1A04F83A9@multiplay.co.uk> References: <54372173.1010100@ijs.si> <644FA8299BF848E599B82D2C2C298EA7@multiplay.co.uk> <54372EBA.1000908@ijs.si> <DE7DD7A94E9B4F1FBB3AFF57EDB47C67@multiplay.co.uk> <543731F3.8090701@ijs.si> <543AE740.7000808@ijs.si> <A5BA41116A7F4B23A9C9E469C4146B99@multiplay.co.uk> <CAHM0Q_N%2BC=3qgUnyDkEugOFcL=J8gBjbTg8v45Vz3uT=e=Fn2g@mail.gmail.com> <6E01BBEDA9984CCDA14F290D26A8E14D@multiplay.co.uk> <CAHM0Q_OpV2sAQQAH6Cj_=yJWAOt8pTPWQ-m45JSiXDpBwT6WTA@mail.gmail.com> <E2E24A91B8B04C2DBBBC7E029A12BD05@multiplay.co.uk> <CAHM0Q_Oeka25-kdSDRC2evS1R8wuQ0_XgbcdZCjS09aXJ9_WWQ@mail.gmail.com> <14ADE02801754E028D9A0EAB4A16527E@multiplay.co.uk> <543C3C47.4010208@ijs.si> <E3C3C359999140B48943A0E1A04F83A9@multiplay.co.uk>
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>> Thank you both for analysis and effort! >> >> I can't rule out the possibility that my main system pool >> on a SSD was low on space at some point in time, but the >> three 4 GiB cloned pools (sys1boot and its brothers) were all >> created as a zfs send / receive copies of the main / (root) >> file system and I haven't noticed anything unusual during >> syncing. This syncing was done manually (using zxfer) and >> independently from the upgrade on the system - on a steady/quiet >> system, when the source file system definitely had sufficient >> free space. >> >> The source file system now shows 1.2 GiB of usage shown >> by df: >> shiny/ROOT 61758388 1271620 60486768 2% / >> Seems unlikely that the 1.2 GiB has grown to 4 GiB space >> on a cloned filesystem. >> >> Will try to import the main two pools after re-creating >> a sane boot pool... > > > Yer zfs list only shows around 2-3GB used too but zpool list > shows the pool is out of space. Cant rule out an accounting > issue though. > What is using the extra space in the pool? Is there an unmounted dataset or snapshot? Do you know how to easily tell? Unlike txg and zio processing I don't have the luxury of having just read that part of the codebase. Thanks.
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